JDK-7133499 : (fc) FileChannel.read not preempted by asynchronous close on OS X
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.nio
  • Affected Version: 7,7u4
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: os_x
  • CPU: unknown,x86
  • Submitted: 2012-01-26
  • Updated: 2014-07-29
  • Resolved: 2014-01-22
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JDK 8 JDK 9
8u20Fixed 9 b03Fixed
Related Reports
Duplicate :  
JDK-7139772 - Implement asynchronous socket channel close on Macosx [Mac OS X]
Relates :  
JDK-7133497 - (fc) FileChannel.lock not preempted by asynchronous close on OS X
Relates :  
JDK-8050499 - (ch) NativeSignal.signal fails with error 316 on OS X
Description
From http://java.net/jira/browse/MACOSX_PORT-229 --

Build: b201
Keywords: test-fail-macos
Tests failed (Regression):
RULE java/nio/channels/AsyncCloseAndInterrupt.java any any
Comments
After this fix the attached test case no longer works on OS X with Java 1.8.0_20-ea-b21. It fails with the following exception: java.io.IOException: Unknown error: 316 at sun.nio.ch.NativeThread.signal(Native Method) at sun.nio.ch.DatagramChannelImpl.implCloseSelectableChannel(DatagramChannelImpl.java:1012) at java.nio.channels.spi.AbstractSelectableChannel.implCloseChannel(AbstractSelectableChannel.java:234) at java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInterruptibleChannel.java:115) at UDPListenerTest$ListenerThread.terminate(UDPListenerTest.java:70) at UDPListenerTest.shutdown(UDPListenerTest.java:30) at UDPListenerTest.main(UDPListenerTest.java:45) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
08-07-2014
I've put a preliminary patch for this issue here: http://cr.openjdk.java.net/~alanb/7133499/webrev/
19-01-2014
EVALUATION Asynchronous close of file channel operations is not currently working on Mac OS X. There are two parts to this, one is the changes in the suggested fix section that will use the SIGIO signal to unblock threads that are blocked in I/O operations, the second part is that the implementation assumes that dup2 will close the file descriptor without blocking indefinitely. Unfortunately on the Mac, dup2 will block indefinitely. This may not be fixable for 7u4.
29-01-2012