FULL PRODUCT VERSION :
java version "1.8.0_20"
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.20-b23, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux prod-backend-19 3.13.0-36-generic #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Heap dump fails with: "can not get class data for sun/net/ExtendedOptionsImpl". Occurs every single time making heap dumps impossible.

$ sudo /opt/jdk/jdk1.8.0_20/bin/jmap -F -dump:format=b,file=heap.dump 15079
Attaching to process ID 15079, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.20-b23
Dumping heap to heap.dump ...
Exception in thread "main" java.lang.reflect.InvocationTargetException
	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 sun.tools.jmap.JMap.runTool(JMap.java:201)
	at sun.tools.jmap.JMap.main(JMap.java:130)
Caused by: sun.jvm.hotspot.utilities.AssertionFailure: can not get class data for sun/net/ExtendedOptionsImpl$$Lambda$10x00000007c01fe828
	at sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
	at sun.jvm.hotspot.utilities.HeapHprofBinWriter.writeInstance(HeapHprofBinWriter.java:803)
	at sun.jvm.hotspot.utilities.AbstractHeapGraphWriter$1.doObj(AbstractHeapGraphWriter.java:95)
	at sun.jvm.hotspot.oops.ObjectHeap.iterateLiveRegions(ObjectHeap.java:353)
	at sun.jvm.hotspot.oops.ObjectHeap.iterate(ObjectHeap.java:171)
	at sun.jvm.hotspot.utilities.AbstractHeapGraphWriter.write(AbstractHeapGraphWriter.java:51)
	at sun.jvm.hotspot.utilities.HeapHprofBinWriter.write(HeapHprofBinWriter.java:433)
	at sun.jvm.hotspot.tools.HeapDumper.run(HeapDumper.java:62)
	at sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:260)
	at sun.jvm.hotspot.tools.Tool.start(Tool.java:223)
	at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
	at sun.jvm.hotspot.tools.HeapDumper.main(HeapDumper.java:83)
	... 6 more


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.reflect.InvocationTargetException
	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 sun.tools.jmap.JMap.runTool(JMap.java:201)
	at sun.tools.jmap.JMap.main(JMap.java:130)
Caused by: sun.jvm.hotspot.utilities.AssertionFailure: can not get class data for sun/net/ExtendedOptionsImpl$$Lambda$10x00000007c01fe828
	at sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
	at sun.jvm.hotspot.utilities.HeapHprofBinWriter.writeInstance(HeapHprofBinWriter.java:803)
	at sun.jvm.hotspot.utilities.AbstractHeapGraphWriter$1.doObj(AbstractHeapGraphWriter.java:95)
	at sun.jvm.hotspot.oops.ObjectHeap.iterateLiveRegions(ObjectHeap.java:353)
	at sun.jvm.hotspot.oops.ObjectHeap.iterate(ObjectHeap.java:171)
	at sun.jvm.hotspot.utilities.AbstractHeapGraphWriter.write(AbstractHeapGraphWriter.java:51)
	at sun.jvm.hotspot.utilities.HeapHprofBinWriter.write(HeapHprofBinWriter.java:433)
	at sun.jvm.hotspot.tools.HeapDumper.run(HeapDumper.java:62)
	at sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:260)
	at sun.jvm.hotspot.tools.Tool.start(Tool.java:223)
	at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
	at sun.jvm.hotspot.tools.HeapDumper.main(HeapDumper.java:83)
	... 6 more

REPRODUCIBILITY :
This bug can be reproduced always.