APAR status
Closed as program error.
Error description
Error Message: N/A . Stack Trace: Java callstack: at sun/nio/ch/FileDispatcherImpl.lock0(Native Method) at sun/nio/ch/FileDispatcherImpl.lock(FileDispatcherImpl.java:119) at sun/nio/ch/FileChannelImpl.lock(FileChannelImpl.java:1095) at java/nio/channels/FileChannel.lock(FileChannel.java:1064) . . . Native callstack: nsleep+0xe4 (0x09000000000397E8 <OSB>libc.a+0x388e8<CSB>) sleep+0x88 (0x090000000015D88C <OSB>libc.a+0x15c98c<CSB>) Java_sun_nio_ch_FileDispatcherImpl_lock0+0xe0 (0x0900000007B339A4 <OSB>libnio.so+0x99a4<CSB>) (0x0900000006249B50 <OSB>libj9vm28.so+0xdcb50<CSB>) (0x090000000616FAFC <OSB>libj9vm28.so+0x2afc<CSB>) (0x09000000062D5C80 <OSB>libj9prt28.so+0x2c80<CSB>) (0x090000000616F8D4 <OSB>libj9vm28.so+0x28d4<CSB>) (0x09000000062B887C <OSB>libj9thr28.so+0x387c<CSB>) _pthread_body+0xf0 (0x0900000000542E14 <OSB>libpthreads.a+0x3e14<CSB>) .
Local fix
Problem summary
Problem is caused because system api 'fcntl' fails with error EDEADLK and APAR IV78039 retry indefinitely as EDEADLK normally is a temporary situation when multiple process/threads attempt to lock same file.
Problem conclusion
java.nio.channels.FileChannel.lock() has been updated to retry for limited number of times. If situation is not changed in this time, an IOException with message 'Deadlock condition if locked' is thrown and should be handled at application level. . This APAR will be fixed in the following Java Releases: 8 SR3 FP10 (8.0.3.10) 7 R1 SR3 FP50 (7.1.3.50) 6 R1 SR8 FP30 (6.1.8.30) 7 SR9 FP50 (7.0.9.50) 6 SR16 FP30 (6.0.16.30) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the available Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV86616
Reported component name
JAVA CLASS LIBS
Reported component ID
620700130
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-07-06
Closed date
2016-07-06
Last modified date
2016-07-06
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
R800 PSY
UP
R700 PSY
UP
R600 PSY
UP
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Document Information
Modified date:
21 February 2022