APAR status
Closed as program error.
Error description
Error Message: A segmentation error is received in compiled_method java/lang/J9VMInternals.prepare(Ljava/lang/Class;)V when customer is running with -Xshareclasses on zOS. Unhandled exception Type=Segmentation error vmState=0x00000000 J9Generic_Signal_Number=00000004 Signal_Number=0000000b Error_Value=00000000 Signal_Code=00000035 Handler1=194351E8 Handler2=19524460 gpr0=00000000 gpr1=3B8B14C4 gpr2=2312D064 gpr3=1A615958 gpr4=192CC940 gpr5=2309E130 gpr6=2312D748 gpr7=19441C00 gpr8=2381CF09 gpr9=1ADE0A98 gpr10=2309E1C0 gpr11=237F678C gpr12=1922ABD8 gpr13=23079200 gpr14=1A615958 gpr15=19433DE8 hgpr0=00000000 hgpr1=00000000 hgpr2=00000000 hgpr3=00000000 hgpr4=00000000 hgpr5=00000000 hgpr6=00000000 hgpr7=00000000 hgpr8=00000000 hgpr9=00000000 hgpr10=00000000 hgpr11=00000000 hgpr12=00000000 hgpr13=00000000 hgpr14=00000000 hgpr15=00000000 fpc=00080000 psw0=078D0400 psw1=A312D098 fpr0=00000001 fpr1=3EAAAAAB fpr2=00000000 fpr3=00000003 fpr4=4744DA81 fpr5=00000000 fpr6=00000000 fpr7=00000000 fpr8=00000000 fpr9=00000000 fpr10=00000000 fpr11=00000000 fpr12=00000000 fpr13=00000000 fpr14=00000000 fpr15=00000000 Program_Unit_Name= Program_Unit_Address=19352B58 Entry_Name=SENDINITIALIZE Entry_Address=19352B58 Compiled_method=java/lang/J9VMInternals.prepare(Ljava/lang/Class ;)V Target=2_60_20110219_076062 (z/OS 01.11.00) CPU=s390 (16 logical CPUs) (0x800000000 RAM) . Stack Trace: ----------- Stack Backtrace ----------- protectedIntrospectBacktraceSymbols+0x17e (, 0x194BCA4E) j9sig_protect+0x5cc (???, 0x194D6D5C) j9introspect_backtrace_symbols+0x17e (, 0x194BC986) generateDiagnosticFiles+0x10c (????, 0x19375EFC) j9sig_protect+0x5cc (???, 0x194D6D5C) structuredSignalHandler+0x180 (???, 0x19377670) masterSynchSignalHandler+0x204 (???, 0x194D53F4) (, 0x18EC25D2) __zerros+0x1d6 (, 0x18EC1A66) CEEVROND+0x11ea (, 0x0932555A) (, 0x0921B224 <OSB>CEEHDSP+0xd2c<CSB>) (, 0x09229156 <OSB>CEEHRNUH+0x96<CSB>) SENDINITIALIZE+0x9dda540 (, 0x2312D098) resolveClassRef+0x32c (???, 0x193BD7C4) SENDCLINIT+0xfffe747c (, 0x1933835C) SENDINITIALIZE+0x19cdb38 (, 0x1AD20690) resolveStaticMethodRef+0x624 (???, 0x193BCC94) SENDCLINIT+0xfffe7556 (, 0x19338436) SENDINITIALIZE+0x19cdb38 (, 0x1AD20690) resolveClassRef+0x32c (???, 0x193BD7C4) SENDCLINIT+0xfffe747c (, 0x1933835C) SENDINITIALIZE+0x19cdb38 (, 0x1AD20690) initializeRequiredClasses+0x51a (???, 0x1AD42EEA) standardInit+0x146 (???, 0x1AD794A6) J9VMDllMain+0x2e0 (???, 0x1AD8BC70) runJ9VMDllMain+0x126 (????, 0x1939599E) pool_do+0x33a (???, 0x193FCCAA) runInitializationStage+0x14c (????, 0x193976F4) protectedInitializeJavaVM+0x1232 (????, 0x193956F2) j9sig_protect+0x5cc (???, 0x194D6D5C) initializeJavaVM+0x496 (???, 0x1939AFD6) JNI_CreateJavaVM+0x70 (???, 0x1938D850) JNI_CreateJavaVM+0x150e (????, 0x192E304E) JNI_CreateJavaVM+0x968 (????, 0x1920E6A0) JavaMain+0x1b0 (, 0x191BC238) CEEVROND+0x11ea (, 0x0932555A) (, 0x0000D1A2 <OSB>CEEOPCMM+0x982<CSB>) --------------------------------------- . The static field that triggers the guarded counting recompilation for AOT methods is not being relocated properly. As a result, when an AOT method is loaded by subsequent JVM instances, the static pointer is stale, and may be pointing to some other piece of memory and/or garbage.
Local fix
Issue can be worked around using the following option: -Xjit:disableGuardedCountingRecompilations -Xaot:disableGuardedCountingRecompilations
Problem summary
The static field that triggers the guarded counting recompilation for AOT methods is not being relocated properly. As a result, when an AOT method is loaded by subsequent JVM instances, the static pointer is stale, and may be pointing to some other piece of memory and/or garbage.
Problem conclusion
This defect will be fixed in: 6.0.1 GA FP1 . The JVM has been updated to address this issue. . To obtain the fix: Install build 20110303 or later
Temporary fix
Comments
APAR Information
APAR number
IV02044
Reported component name
JIT
Reported component ID
620700124
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-06-16
Closed date
2011-06-16
Last modified date
2011-06-16
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
JIT
Fixed component ID
620700124
Applicable component levels
R260 PSY
UP
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Document Information
Modified date:
16 June 2011