APAR status
Closed as program error.
Error description
Error Message: Segmentation error occurs when a user tries to use a non-persistent shared class cache in read-only mode with a memory control file of 0 size. . Stack Trace: j9shsem_deprecated_getid at sysvipc/j9shsem_deprecated.c:1173 SH_OSCachesysv::initializeHeader at OSCachesysv.cpp:577 SH_OSCachesysv::openCache at OSCachesysv.cpp:348 SH_OSCachesysv::startup at OSCachesysv.cpp:224 SH_CompositeCacheImpl::startup at CompositeCache.cpp:1151 SH_CacheMap::startup at CacheMap.cpp:425 j9shr_init at shrinit.cpp:2837 J9VMDllMain at shrclssup.c:225 runJ9VMDllMain at jvminit.c:2310 pool_do at pool.c:636 runInitializationStage at jvminit.c:2260 protectedInitializeJavaVM at jvminit.c:5051 j9sig_protect at jvminit.c:948 JNI_CreateJavaVM at jniinv.c:101 JNI_CreateJavaVM at jvm.c:2089 JNI_CreateJavaVM () from /team/ashu/java7sr1/unzipped/jre/lib/amd64/j9vm/libjvm.so JavaMain () from /team/ashu/java7sr1/unzipped/jre/bin/../lib/amd64/jli/libjli.so .
Local fix
Remove the control files by using -Xshareclasses:destroy option and retry.
Problem summary
The problem occurs when the memory control file of a non-persistent shared class cache is of 0 size. Using such a cache in read-only mode specified by -Xsharedclasses:readonly option results in JVM to crash.
Problem conclusion
This defect will be fixed in: 6.0.1 SR3 7.0.0 SR2 . JVM has been fixed to display a proper error message when it tries to attach to a non-persistent shared class cache with memory control file of size 0 bytes in read-only mode.
Temporary fix
Comments
APAR Information
APAR number
IV26904
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-08-23
Closed date
2012-08-23
Last modified date
2012-08-23
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
R260 PSY
UP
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Document Information
Modified date:
21 February 2022