APAR status
Closed as program error.
Error description
Error Message: 14:30:00.734642317 0x0 j9mm.621 Event GC Assertion message: readObject 503fd3a558 in Evacuate 14:30:00.735437029 *0x50420a7200 j9mm.141 Assert * ** ASSERTION FAILED ** at ./StandardAccessBarrier.cpp:655: ((false)) . Stack Trace: #14 0x00007f80abb02aae in MM_StandardAccessBarrier::preObjectRead (this=0x7f80ac0366d0, vmThread=<value optimized out>, srcObject=<value optimized out>, srcAddress=<value optimized out>) at StandardAccessBarrier.cpp:655 #15 0x00007f80ab9561ae in MM_ObjectAccessBarrier::mixedObjectReadObject (this=0x7f80ac0366d0, vmThread=0x99ed00, srcObject=0x2fe050e8, srcOffset=<value optimized out>, isVolatile=false) at ObjectAccessBarrier.cpp:562 #16 0x00007f80ab1d9b3d in jvmtiGetThreadInfo (env=<value optimized out>, thread=<value optimized out>, info_ptr=0x7f80a95769f0) at jvmtiThread.c:487 #17 0x00007f80aad03210 in jdwp::ThreadReference::NameHandler::Execute(JNIEnv_*) () from /team/Dmitri/136058/sdk/jre/lib/amd64/libjdwp.so #18 0x00007f80aad0ee7e in jdwp::SyncCommandHandler::Run(JNIEnv_*, jdwp::CommandParser*) () from /team/Dmitri/136058/sdk/jre/lib/amd64/libjdwp.so #19 0x00007f80aad0e582 in jdwp::CommandDispatcher::ExecCommand(JNIEnv_*, jdwp::CommandParser*) () from /team/Dmitri/136058/sdk/jre/lib/amd64/libjdwp.so #20 0x00007f80aad19503 in jdwp::PacketDispatcher::Run(JNIEnv_*) () from /team/Dmitri/136058/sdk/jre/lib/amd64/libjdwp.so #21 0x00007f80aad19d88 in jdwp::PacketDispatcher::StartFunction(_jvmtiEnv*, JNIEnv_*, void*) () from /team/Dmitri/136058/sdk/jre/lib/amd64/libjdwp.so #22 0x00007f80ab1d928a in wrappedAgentThreadStart (portLib=0x7f80b1cc4840, entryArg=<value optimized out>) at jvmtiThread.c:968 #23 0x00007f80b0eb1475 in omrsig_protect (portLibrary=0x7f80b1cc4840, fn=0x7f80ab1d91d0 <wrappedAgentThreadStart>, fn_arg=0x7f80ac35a910, handler=0x7f80b15a6440 <structuredSignalHandler>, handler_arg=0x99ed00, flags=126, result=0x7f80a9576ef8) at ../../omr/port/unix/omrsignal.c:397 #24 0x00007f80ab1d890f in agentThreadStart (entryArg=<value optimized out>) at jvmtiThread.c:930 #25 0x00007f80b131738e in thread_wrapper () from /team/Dmitri/136058/sdk/jre/lib/amd64/compressedrefs/libj9thr29. so .
Local fix
Do not use Concurrent Scavenger by excluding -Xgc:concurrentScavenge option
Problem summary
The elements of JNI Weak Global References Table were not handled properly in Concurrent Scavenger
Problem conclusion
Handling of JNI Weak Global References Table elements has been fixed for case of Concurrent Scavenger . This APAR will be fixed in the following Java Releases: 8 SR5 FP7 (8.0.5.7) . 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
IJ02541
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
270
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-12-08
Closed date
2017-12-08
Last modified date
2017-12-08
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
J9 COMMON CODE
Fixed component ID
620700127
Applicable component levels
R270 PSY
UP
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Document Information
Modified date:
21 February 2022