APAR status
Closed as program error.
Error description
Error Message: 0x2b5ee00 j9mm.107 * ** ASSERTION FAILED ** at ../../gc_glue_java/ScavengerRootClearer.cpp:45: ((false && (_scavenger->isObjectInNewSpace(referenceObj)))) or j> 20:44:13 Unhandled exception j> 20:44:13 Type=Segmentation error vmState=0x0002000f j> 20:44:13 Windows_ExceptionCode=c0000005 J9Generic_Signal=00000004 ExceptionAddress=000007FEF1AB12C8 ContextFlags=0010001f j> 20:44:13 Handler1=000007FEF307FA20 Handler2=000007FEF32EC4B0 InaccessibleReadAddress=0000000000000036 j> 20:44:13 RDI=00000000FFF70320 RSI=0000000000040000 RAX=0000000000000000 RBX=000007FEF1BC1820 j> 20:44:13 RCX=0000000000000000 RDX=00000000FFF70328 R8=0000000000000036 R9=000007FEF1BC17F0 j> 20:44:13 R10=000007FEF1BC1980 R11=000007FEF1BC19C0 R12=0000000012C8DAF8 R13=00000000225EF138 j> 20:44:13 R14=0000000012C8DBE8 R15=0000000000000002 j> 20:44:13 RIP=000007FEF1AB12C8 RSP=00000000225EEEE0 RBP=0000000000000000 GS=002B j> 20:44:13 FS=0053 ES=002B DS=002B j> 20:44:13 XMM0 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM1 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM2 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM3 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM4 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM5 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM6 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM7 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM8 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM9 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM10 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM11 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM12 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM13 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM14 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 XMM15 0000000000000000 (f: 0.000000, d: 0.000000e+000) j> 20:44:13 Module=W:\builds\bld_346049\sdk\wa6480\jre\bin\compressedrefs\j9 gc29.dll j> 20:44:13 Module_base_address=000007FEF18E0000 Offset_in_DLL=00000000001d12c8 j> 20:44:13 Target=2_90_20170501_346049 (Windows 7 6.1 build 7601 Service Pack 1) j> 20:44:13 CPU=amd64 (6 logical CPUs) (0x3fff8e000 RAM) j> 20:44:13 ----------- Stack Backtrace ----------- j> 20:44:14 MM_ScavengerRootClearer::processReferenceList+0x268 (scavengerrootclearer.cpp:52, 0x000007FEF1AB12C8 <OSB>j9gc29+0x1d12c8<CSB>) j> 20:44:14 MM_ScavengerRootClearer::scavengeReferenceObjects+0x2bd (scavengerrootclearer.cpp:99, 0x000007FEF1AB17BD <OSB>j9gc29+0x1d17bd<CSB>) j> 20:44:14 MM_ScavengerRootClearer::scanWeakReferenceObjects+0x5e (scavengerrootclearer.hpp:90, 0x000007FEF1A431CE <OSB>j9gc29+0x1631ce<CSB>) j> 20:44:14 MM_RootScanner::scanClearable+0x41 (rootscanner.cpp:901, 0x000007FEF18F2771 <OSB>j9gc29+0x12771<CSB>) j> 20:44:14 MM_Scavenger::workThreadGarbageCollect+0xc2 (scavenger.cpp:2029, 0x000007FEF1A61522 <OSB>j9gc29+0x181522<CSB>) j> 20:44:14 MM_ParallelDispatcher::slaveEntryPoint+0x8a (paralleldispatcher.cpp:169, 0x000007FEF1A068BA <OSB>j9gc29+0x1268ba<CSB>) j> 20:44:14 dispatcher_thread_proc2+0x18f (paralleldispatcher.cpp:92, 0x000007FEF1A066BF <OSB>j9gc29+0x1266bf<CSB>) j> 20:44:14 omrsig_protect+0x206 (omrsignal.c:220, 0x000007FEF32ED056 <OSB>j9prt29+0x2d056<CSB>) j> 20:44:14 dispatcher_thread_proc+0x48 (paralleldispatcher.cpp:131, 0x000007FEF1A06818 <OSB>j9gc29+0x126818<CSB>) j> 20:44:14 thread_wrapper+0x11e (omrthread.c:1596, 0x000007FEF6A05D6E <OSB>J9THR29+0x5d6e<CSB>) j> 20:44:14 _endthreadex+0x43 (0x0000000070ED1DB7 <OSB>MSVCR100+0x21db7<CSB>) j> 20:44:14 _endthreadex+0xdf (0x0000000070ED1E53 <OSB>MSVCR100+0x21e53<CSB>) j> 20:44:14 BaseThreadInitThunk+0xd (0x00000000775959CD <OSB>kernel32+0x159cd<CSB>) j> 20:44:14 RtlUserThreadStart+0x21 (0x00000000776CA561 <OSB>ntdll+0x2a561<CSB>) . Stack Trace: j> 20:44:13 ----------- Stack Backtrace ----------- j> 20:44:14 MM_ScavengerRootClearer::processReferenceList+0x268 (scavengerrootclearer.cpp:52, 0x000007FEF1AB12C8 <OSB>j9gc29+0x1d12c8<CSB>) j> 20:44:14 MM_ScavengerRootClearer::scavengeReferenceObjects+0x2bd (scavengerrootclearer.cpp:99, 0x000007FEF1AB17BD <OSB>j9gc29+0x1d17bd<CSB>) j> 20:44:14 MM_ScavengerRootClearer::scanWeakReferenceObjects+0x5e (scavengerrootclearer.hpp:90, 0x000007FEF1A431CE <OSB>j9gc29+0x1631ce<CSB>) j> 20:44:14 MM_RootScanner::scanClearable+0x41 (rootscanner.cpp:901, 0x000007FEF18F2771 <OSB>j9gc29+0x12771<CSB>) j> 20:44:14 MM_Scavenger::workThreadGarbageCollect+0xc2 (scavenger.cpp:2029, 0x000007FEF1A61522 <OSB>j9gc29+0x181522<CSB>) j> 20:44:14 MM_ParallelDispatcher::slaveEntryPoint+0x8a (paralleldispatcher.cpp:169, 0x000007FEF1A068BA <OSB>j9gc29+0x1268ba<CSB>) j> 20:44:14 dispatcher_thread_proc2+0x18f (paralleldispatcher.cpp:92, 0x000007FEF1A066BF <OSB>j9gc29+0x1266bf<CSB>) j> 20:44:14 omrsig_protect+0x206 (omrsignal.c:220, 0x000007FEF32ED056 <OSB>j9prt29+0x2d056<CSB>) j> 20:44:14 dispatcher_thread_proc+0x48 (paralleldispatcher.cpp:131, 0x000007FEF1A06818 <OSB>j9gc29+0x126818<CSB>) j> 20:44:14 thread_wrapper+0x11e (omrthread.c:1596, 0x000007FEF6A05D6E <OSB>J9THR29+0x5d6e<CSB>) j> 20:44:14 _endthreadex+0x43 (0x0000000070ED1DB7 <OSB>MSVCR100+0x21db7<CSB>) j> 20:44:14 _endthreadex+0xdf (0x0000000070ED1E53 <OSB>MSVCR100+0x21e53<CSB>) j> 20:44:14 BaseThreadInitThunk+0xd (0x00000000775959CD <OSB>kernel32+0x159cd<CSB>) j> 20:44:14 RtlUserThreadStart+0x21 (0x00000000776CA561 <OSB>ntdll+0x2a561<CSB>) . Occur with Gencon GC policy on Windows only
Local fix
Use GC policy other then Gencon or run with -Xgcthreads1
Problem summary
Missed write barrier for multi threaded environment
Problem conclusion
Threads synchronization has been fixed . This APAR will be fixed in the following Java Releases: 8 SR5 (8.0.5.0) . 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
IV99781
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
2017-09-11
Closed date
2017-09-11
Last modified date
2017-09-11
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:
22 February 2022