JDK-8156099 : [macosx] Drag and drop of link from web browser, DataFlavor types application/x-java-url and text/uri-list, getTransferData returns null
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.awt
  • Affected Version: 8u72,9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: os_x
  • CPU: x86
  • Submitted: 2016-05-04
  • Updated: 2017-01-10
  • Resolved: 2016-08-22
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JDK 9
9 b135Fixed
Related Reports
Relates :  
JDK-8165680 - [macosx] Enhance handling of UTF-8 characters in CDataTransfer.java
Relates :  
JDK-8136763 - [macosx] java always returns only one value for "text/uri-list" dataflavor even if several files were copied
Description
FULL PRODUCT VERSION :
Bug reproduced in jdk8u72, 8u74, 8u77, 8u91, 8u92
Bug did not reproduce in 8u71 and 8u73.
java -version for the 8u92 test:

java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
MacOS X 10.11.4

EXTRA RELEVANT SYSTEM CONFIGURATION :
Bug reproduced on various Macs running OS X 10.11.4 (El Capitan) using Chrome version 50.0.2661.94 (64-bit), Firefox 45.0.2, and Safari Version 9.1 (11601.5.17.1). Test case worked on Linux (Fedora 21). Didn't try on Windows.

A DESCRIPTION OF THE PROBLEM :
Drag and drop of a link from a web browser fails when the code uses a DataFlavor with mime type application/x-java-url or text/uri-list because the Transferable instance returns true for isDataFlavorSupported{flavior) (that is the DataFlavor can be found in the array returned by getTransferableFlavors()) yet getTransferData(flavor) returns null.

This can be seen in the example code that is pasted in below. The result is that our application that accepts drag and drop of file links in a web browser that works in Linux and Windows and works on Mac OS X using Java 8u71, no longer works on Mac OS X using the current 8u91 or 8u92. The bug seems to have been introduced in 8u72, but skipped 8u73, appearing again in 8u74 and all later including the current 8u92.

REGRESSION.  Last worked in version 8u73

ADDITIONAL REGRESSION INFORMATION: 
works in
java version "1.8.0_71"
Java(TM) SE Runtime Environment (build 1.8.0_71-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.71-b15, mixed mode)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
On a Mac running OS X 10.11.4 (El Capitan), run the example code pasted in below, in such a way that you can see the text output to stdout. For example you can run the program from the command line in a Terminal window. The code is a self contained class with a main method. The program opens up a blank square pane. Open a web browser. For my test I went to http://example.com which is a page that contains a link with the text "More information..." but any web page with an ordinary html link should do. Drag and drop the link from the web browser to the blank square pane of the test program. The program will print output to stdout.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
This is the output when running the example using Java 8u71, which has correct results, after dragging and dropping the More Information... link from http://example.com

$ /Library/Java/JavaVirtualMachines/jdk1.8.0_71.jdk/Contents/Home/jre/bin/java -cp . dnd.DragHere
java.awt.datatransfer.DataFlavor[mimetype=application/x-java-url;representationclass=java.net.URL]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.Reader]:	java.io.InputStreamReader@550accb1
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.Reader]:	java.io.InputStreamReader@6c346718
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.Reader]:	java.io.InputStreamReader@4cfd64e4
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.lang.String]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.lang.String]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.lang.String]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.CharBuffer]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.CharBuffer]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.CharBuffer]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[C]:	[C@1057fa63
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[C]:	[C@133bd39c
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[C]:	[C@5c787a44
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@7b85ef6b
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@54ae869a
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@19c408a0
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=272 cap=272]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=272 cap=272]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=272 cap=272]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16]:	[B@6f1fb86
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16]:	[B@525ba284
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16]:	[B@72617403
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@4bd9f3e7
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@42fd1cd1
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@4dbdd988
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@34057d50
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-8]:	[B@30c7f6fc
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-8]:	[B@1a766fa1
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-8]:	[B@39a484fe
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@26548167
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@29abf347
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@99ab4
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16BE]:	[B@1d177d3f
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16BE]:	[B@1f4a9843
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16BE]:	[B@690d6126
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@251d8a89
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@345e590
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@4886ed3b
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16LE]:	[B@4a80b15c
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16LE]:	[B@3803347
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16LE]:	[B@2fc53fc2
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@5055e034
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@1f10b133
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@1d08a39d
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=ISO-8859-1]:	[B@1b35b4d1
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=ISO-8859-1]:	[B@649ea3c3
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=ISO-8859-1]:	[B@7e9d0f4a
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@26d15f4f
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@10f4f478
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@165dd1e
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=US-ASCII]:	[B@17147527
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=US-ASCII]:	[B@3b937bad
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=US-ASCII]:	[B@cf30f93
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.Reader]:	java.io.InputStreamReader@23d1be3e
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.lang.String]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.CharBuffer]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[C]:	[C@17d84a2e
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@37b6056b
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=72 cap=72]
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16]:	[B@232d0b99
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@da3718c
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@587fc32c
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-8]:	[B@5fe50815
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@145fb1b3
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=70 cap=70]
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16BE]:	[B@2669da5
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@24a64866
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=70 cap=70]
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16LE]:	[B@53744947
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@3acfb8b3
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=ISO-8859-1]:	[B@cf281fa
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@1a010d7a
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=US-ASCII]:	[B@6bce510c
java.awt.datatransfer.DataFlavor[mimetype=application/x-java-serialized-object;representationclass=java.lang.String]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.Reader]:	java.io.InputStreamReader@2c8376e6
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.lang.String]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.CharBuffer]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[C]:	[C@3466dfdd
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=unicode]:	java.io.StringReader@269e6ef6
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=72 cap=72]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16]:	[B@3fc10d18
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@8c26840
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@a58d6b2
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-8]:	[B@5fe4f0d1
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@68fa8ff8
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=70 cap=70]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16BE]:	[B@73e16acf
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@3f40df47
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=70 cap=70]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16LE]:	[B@47dad206
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@7be3104a
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=ISO-8859-1]:	[B@3acaaeb
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@3aaff73e
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=US-ASCII]:	[B@2b74488f


ACTUAL -
This is the output running the same test using Java 8u92

$ /Library/Java/JavaVirtualMachines/jdk1.8.0_92.jdk/Contents/Home/jre/bin/java -cp . dnd.DragHere
2016-05-04 20:09:37.308 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=application/x-java-url;representationclass=java.net.URL]:	null
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.Reader]:	java.io.InputStreamReader@2525f17f
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.Reader]:	java.io.InputStreamReader@490a3aaa
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.Reader]:	java.io.InputStreamReader@3ec959df
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.lang.String]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.lang.String]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.lang.String]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.CharBuffer]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.CharBuffer]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.CharBuffer]:	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><a href="http://www.iana.org/domains/example">More information...</a>
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[C]:	[C@3f6be264
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[C]:	[C@354f52ff
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[C]:	[C@2d88e196
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@597b4259
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@39e3e3d0
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@767496b9
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=272 cap=272]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=272 cap=272]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=272 cap=272]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16]:	[B@1c9a4db0
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16]:	[B@1ff0adf0
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16]:	[B@392b30bd
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@6b38a87f
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@25018f65
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@3f043918
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@5fca589d
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-8]:	[B@719f684b
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-8]:	[B@58ccabba
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-8]:	[B@469e8542
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@4b1d33bc
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@41cac7a4
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@7ce6355c
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16BE]:	[B@4ee01b17
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16BE]:	[B@6c4251a4
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16BE]:	[B@7b225c6f
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@3623ca82
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@78d557f2
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@6e4f63d
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=270 cap=270]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16LE]:	[B@6f4c13aa
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16LE]:	[B@4713b31b
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=UTF-16LE]:	[B@152b16cc
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@345f5f4a
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@3b81cb28
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@61d02c28
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=ISO-8859-1]:	[B@2c00dba8
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=ISO-8859-1]:	[B@626b646d
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=ISO-8859-1]:	[B@57863b83
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@3757ec37
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@1d20acee
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@2451fb2b
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=135 cap=135]
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=US-ASCII]:	[B@426d9601
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=US-ASCII]:	[B@4ad3ec2f
java.awt.datatransfer.DataFlavor[mimetype=text/html;representationclass=[B;charset=US-ASCII]:	[B@520c7e47
2016-05-04 20:09:37.476 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.Reader]:	null
2016-05-04 20:09:37.478 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.lang.String]:	null
2016-05-04 20:09:37.480 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.CharBuffer]:	null
2016-05-04 20:09:37.482 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[C]:	null
2016-05-04 20:09:37.485 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16]:	null
2016-05-04 20:09:37.487 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	null
2016-05-04 20:09:37.489 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16]:	null
2016-05-04 20:09:37.491 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-8]:	null
2016-05-04 20:09:37.493 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-8]:	null
2016-05-04 20:09:37.494 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	null
2016-05-04 20:09:37.496 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-8]:	null
2016-05-04 20:09:37.497 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16BE]:	null
2016-05-04 20:09:37.499 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	null
2016-05-04 20:09:37.502 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16BE]:	null
2016-05-04 20:09:37.504 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16LE]:	null
2016-05-04 20:09:37.506 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	null
2016-05-04 20:09:37.508 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16LE]:	null
2016-05-04 20:09:37.510 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=ISO-8859-1]:	null
2016-05-04 20:09:37.512 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	null
2016-05-04 20:09:37.514 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=ISO-8859-1]:	null
2016-05-04 20:09:37.516 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=US-ASCII]:	null
2016-05-04 20:09:37.517 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	null
2016-05-04 20:09:37.519 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):
http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=US-ASCII]:	null
java.awt.datatransfer.DataFlavor[mimetype=application/x-java-serialized-object;representationclass=java.lang.String]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.Reader]:	java.io.InputStreamReader@79af4f8e
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.lang.String]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.CharBuffer]:	http://www.iana.org/domains/example
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[C]:	[C@57dc1324
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=unicode]:	java.io.StringReader@2bb3f64
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16]:	java.nio.HeapByteBuffer[pos=0 lim=72 cap=72]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16]:	[B@33f49732
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@30a47dfd
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-8]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@7561dfe
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-8]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-8]:	[B@5c4d426f
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-16BE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@4b9703d3
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]:	java.nio.HeapByteBuffer[pos=0 lim=70 cap=70]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16BE]:	[B@584fc4c9
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-16LE]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@6f419bd3
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]:	java.nio.HeapByteBuffer[pos=0 lim=70 cap=70]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16LE]:	[B@5929e26e
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=ISO-8859-1]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@2ad3eb03
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=ISO-8859-1]:	[B@c9c1b1c
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=US-ASCII]:	sun.awt.datatransfer.DataTransferer$ReencodingInputStream@6fe0965f
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=US-ASCII]:	java.nio.HeapByteBuffer[pos=0 lim=35 cap=35]
java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=US-ASCII]:	[B@794c335f



ERROR MESSAGES/STACK TRACES THAT OCCUR :
Notice that the output pasted in the Actual Result contains multiple error messages that look like

2016-05-04 20:09:37.308 java[7260:252663] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)):


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package dnd;

import javax.swing.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;

/**
 * Test code copied from https://bugs.openjdk.java.net/browse/JDK-8031964
 *  different bug but this code shows what is needed in this case too
 */

public class DragHere {

    public static void main(String[] args) {
        final JFrame frame = new JFrame();
        final JPanel panel = new JPanel();
        frame.getContentPane().add(panel);
        panel.setTransferHandler(new TransferHandler(){
            @Override
            public boolean canImport(final TransferSupport support) {
                return true;
            }

            @Override
            public boolean importData(final TransferSupport support) {
                final Transferable transferable = support.getTransferable();
                final DataFlavor[] flavors = transferable.getTransferDataFlavors();
                for (final DataFlavor flavor : flavors){
                    try {
                        final Object transferData = transferable.getTransferData(flavor);
                        System.out.print(flavor + ":\t");
                        System.out.println(transferData);
                    } catch (UnsupportedFlavorException e) {
                        System.out.println("UnspportedFlavorException: "+e.getMessage());
                        e.printStackTrace();
                    } catch (IOException e) {
                        System.out.println("IOException: "+e.getMessage());
                        e.printStackTrace();
                    }
                }
                return true;
            }
        });
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                frame.setBounds(100, 100, 100, 100);
                frame.setVisible(true);
            }
        });
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
The application typically has a Transferable instance which I will call transferable and a DataFlavor instance which I will call dataFlavor, then does something like 

    if (transferable.isDataFlavorSupported(dataFlavor)) { ... do something with transferable.getTransferData(dataFlavor) ...} else { .. use a different DataFlavor ...}

Instead if transferable.isDataFlavorSupported(dataFlavor) returns true then get the value returned by transferable.getTransferData(dataFlavor) and check if it is null. If it is null then follow the code path that would have been taken if transferable.isDataFlavorSupported(dataFlavor) had returned false.

This is not a complete workaround because the application/x-java-url and text/uri-list mime type DataFlavors are not handled, but often the application has a fallback of using text/plain  DataFlavor when the others are not available and that works well enough.
Comments
Cause of the issue: This issue is a regression of issue https://bugs.openjdk.java.net/browse/JDK-8136763. While adding fix to 8136763 code was modified to handle coping of multiple files but proper distinction was not added between bytes containing files and urls. Fix: Fixed by comparing format of the bytes received for dataflavor "mimetype=text/uri-list". Fixed by distinguishing between bytes containing files and urls. In both cases the dataflavor contains same ���mimetype=text/uri-list���, but the format is different. Format CF_FILE is only used in case of bytes containing files. Webrev link: http://cr.openjdk.java.net/~mhalder/8156099/webrev.02/
18-08-2016
Requested to fix (Hendrik's request)
22-06-2016
It would be nice, if this got finally resolved and backported to Java8. DnD not working properly is quite the pain, IMHO.
15-06-2016
Issue is reproduced on OS X 10.11.3 with JDK 9. Version details with error log: Java Version: java version "9-ea" Java(TM) SE Runtime Environment (build 9-ea+110) Java HotSpot(TM) 64-Bit Server VM (build 9-ea+110, mixed mode) OS X Version: OS X 10.11.3 (15D21) Error Log: 2016-05-10 00:17:57.180 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.Reader]: null 2016-05-10 00:17:57.185 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.lang.String]: null 2016-05-10 00:17:57.186 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.CharBuffer]: null 2016-05-10 00:17:57.188 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[C]: null 2016-05-10 00:17:57.189 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16]: null 2016-05-10 00:17:57.191 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16]: null 2016-05-10 00:17:57.192 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16]: null 2016-05-10 00:17:57.193 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-8]: null 2016-05-10 00:17:57.194 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-8]: null 2016-05-10 00:17:57.196 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-8]: null 2016-05-10 00:17:57.197 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-8]: null 2016-05-10 00:17:57.198 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16BE]: null 2016-05-10 00:17:57.199 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]: null 2016-05-10 00:17:57.200 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16BE]: null 2016-05-10 00:17:57.200 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=UTF-16LE]: null 2016-05-10 00:17:57.201 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]: null 2016-05-10 00:17:57.203 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=UTF-16LE]: null 2016-05-10 00:17:57.204 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=ISO-8859-1]: null 2016-05-10 00:17:57.205 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]: null 2016-05-10 00:17:57.205 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=ISO-8859-1]: null 2016-05-10 00:17:57.207 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.io.InputStream;charset=US-ASCII]: null 2016-05-10 00:17:57.208 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=java.nio.ByteBuffer;charset=US-ASCII]: null 2016-05-10 00:17:57.209 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/uri-list;representationclass=[B;charset=US-ASCII]: null java.awt.datatransfer.DataFlavor[mimetype=application/x-java-serialized-object;representationclass=java.lang.String]: http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.Reader]: java.io.InputStreamReader@40cfb455 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.lang.String]: http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.CharBuffer]: http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[C]: [C@1d3403f4 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=unicode]: java.io.StringReader@4bbbc214 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16]: java.nio.HeapByteBuffer[pos=0 lim=74 cap=74] java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16]: [B@35921a24 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-8]: sun.awt.datatransfer.DataTransferer$ReencodingInputStream@1ebe26bb java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-8]: sun.awt.datatransfer.DataTransferer$ReencodingInputStream@b00ec1a java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-8]: java.nio.HeapByteBuffer[pos=0 lim=36 cap=36] java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-8]: [B@2733e982 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-16BE]: sun.awt.datatransfer.DataTransferer$ReencodingInputStream@615db0f5 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16BE]: java.nio.HeapByteBuffer[pos=0 lim=72 cap=72] java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16BE]: [B@591a3aa5 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=UTF-16LE]: sun.awt.datatransfer.DataTransferer$ReencodingInputStream@19ccbe22 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=UTF-16LE]: java.nio.HeapByteBuffer[pos=0 lim=72 cap=72] java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=UTF-16LE]: [B@118b60ac java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=ISO-8859-1]: sun.awt.datatransfer.DataTransferer$ReencodingInputStream@309c8752 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=ISO-8859-1]: java.nio.HeapByteBuffer[pos=0 lim=36 cap=36] java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=ISO-8859-1]: [B@4cdd02cd java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.io.InputStream;charset=US-ASCII]: sun.awt.datatransfer.DataTransferer$ReencodingInputStream@6f309b81 java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=java.nio.ByteBuffer;charset=US-ASCII]: java.nio.HeapByteBuffer[pos=0 lim=36 cap=36] java.awt.datatransfer.DataFlavor[mimetype=text/plain;representationclass=[B;charset=US-ASCII]: [B@3bc22722 2016-05-10 00:17:57.254 java[442:5712] CDataTransferer_dragQueryFile: plist not a valid NSArray (error (null)): http://www.programmingbasics.org/en/ java.awt.datatransfer.DataFlavor[mimetype=application/x-java-url;representationclass=java.net.URL]: null
09-05-2016
Might be related to CDataTransferer.java in AWT. assigning to Manajit.
06-05-2016
does it affect 9?
05-05-2016