Bug ID: JDK-6380091 IOException/SIGSEGV occurs during SocketChannel.close processing.

Type: Bug
Component: core-libs
Sub-Component: java.nio
Affected Version: 5.0,5.0u4,5.0u5,5.0u6

Priority: P2
Status: Resolved
Resolution: Fixed
OS:
linux,linux_2.6,linux_redhat_3.0,solaris_10 linux,linux_2.6,linux_redhat_3.0,solaris_10
CPU: generic,x86,sparc

Submitted: 2006-02-02
Updated: 2010-04-02
Resolved: 2006-02-18

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Other	JDK 6
5.0u8Fixed	6 b73Fixed

The customer is getting following 3 errors at SocketChannel.close processing.

Case1: SIGSEGV occurs and VM crashes.
       (See hs_err_pid14024.log, but core was not generated.)
Case2: "IOException: No such file or directory" occurs.
Case3: "IOException: Thread signal failed" occurs

EVALUATION -- Submitter has confirmed that fix addresses the issues that they observed.

24-02-2006

EVALUATION The bug is that a non-existant thread is being signalled. The issue is intermittent and the failure modes vary because the pthread_t of a terminated thread is passed to pthread_kill. The reason this is happening is because SocketChannelImpl's connect method isn't resetting the readerThread so when the channel is closed it attempts to signal the reader. The test case provokes this problem because it has a thread that terminates immediately after establishing a connection.

02-02-2006

SUGGESTED FIX ------- SocketChannelImpl.java ------- *** /tmp/sccs.ZwayGQ Thu Feb 2 09:40:26 2006 --- SocketChannelImpl.java Thu Feb 2 09:40:16 2006 *************** *** 476,481 **** --- 476,482 ---- } } } finally { + readerThread = 0; end((n > 0) || (n == IOStatus.UNAVAILABLE)); assert IOStatus.check(n); }

02-02-2006

Duplicate :	JDK-6691969 - Workaround Bugzilla Bug 169995 - Crash running pthread_kill on dead thread
Duplicate :	JDK-6445262 - Need analysis on nio error
Relates :	JDK-2137628 - (ch) test/java/nio/channels/AsyncCloseAndInterrupt.java fails in 5.0u8 and mustang (linux only)
Relates :	JDK-6419424 - (ch) test/java/nio/channels/AsyncCloseAndInterrupt.java fails in 5.0u8 and mustang (linux only)