APAR status
Closed as program error.
Error description
Error Message: Deadlock occurred when a thread doing SocketChannel.open() is interrupted by another thread. . Stack Trace: "Thread-6" J9VMThread:0x032E0200, j9thread_t:0x03E20A28, Blocked on: java/lang/Object@0x5BB179B8 Owned by: "Thread-5" (J9VMThread:0x03300D00, java/lang/Thread:0x5BAD0D30) Java callstack: at java/nio/channels/spi/AbstractSelectableChannel .implCloseChannel(AbstractSelectableChannel.java:212) at java/nio/channels/spi/AbstractInterruptibleChannel$1.interrupt (AbstractInterruptibleChannel.java:158) at java/lang/Thread.interrupt(Thread.java:525) "Thread-5" J9VMThread:0x03300D00, j9thread_t:0x03E238D0, Blocked on: java/lang/Thread$ThreadLock@0x5BAD19D8 Owned by: "Thread-6" (J9VMThread:0x032E0200, java/lang/Thread:0x5BAD0C30) Java callstack: at java/lang/Thread.blockedOn(Thread.java:1071) at sun/reflect/NativeMethodAccessorImpl.invoke0(Native Method) at sun/reflect/NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:60) at sun/reflect/DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:37) at java/lang/reflect/Method.invoke(Method.java:611) at sun/misc/SharedSecrets$1.blockedOn(SharedSecrets.java:117) at java/nio/channels/spi/AbstractInterruptibleChannel .blockedOn(AbstractInterruptibleChannel.java:209) at java/nio/channels/spi/AbstractInterruptibleChannel.end (AbstractInterruptibleChannel.java:197) at sun/nio/ch/SocketChannelImpl.connect(SocketChannelImpl.java:530) at java/nio/channels/SocketChannel.open(SocketChannel.java:157) .
Local fix
Problem summary
The deadlock occurred due to a lock contention between SocketChannel open and interrupt threads when a thread establishing a socket connection is interrupted by another thread.
Problem conclusion
This defect will be fixed in: 6.0.0 SR11 6.0.1 SR4 7.0.0 SR3 . JVM NIO channel code is updated to avoid the lock contention between SocketChannel open and interrupt threads.
Temporary fix
Comments
APAR Information
APAR number
IV23868
Reported component name
JAVA CLASS LIBS
Reported component ID
620700130
Reported release
600
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-06-27
Closed date
2012-06-27
Last modified date
2012-11-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
JAVA CLASS LIBS
Fixed component ID
620700130
Applicable component levels
R600 PSY
UP
R700 PSY
UP
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Document Information
Modified date:
02 November 2012