After integrating JCo in an existing web application, we experience infrequent JVM crashes. We suspect that the error is caused by the native JCo libaries.
Analysis so far:
- Every Javacore dump contains the following lines:
SIGSEGV received at 0xd12482cc in /usr/WebSphere/AppServer/java/jre/bin/classic/libjvm.a. Processing terminated.
J2RE 1.4.2 IBM AIX build ca142ifx-20051115 (SR3 + 94164 + 97403 + 97482)
- The current thread in each core dump is in a different java class.
- Every Javacore contains a thread with the native JCo call:
"1922390637::609738/NORDKredit" (TID:0x302E0E28, sys_thread_t:0x69ECB620, state:R, native ID:0x47B5) prio=5
at com.sap.mw.jco.rfc.MiddlewareRFC$Client.nativeExecute(Native Method)
- The garbage collector runs in verbose mode and shows 50-70% free memory.
IBM Websphere 6.2
IBM JDK 1.4.2
Has anybody experienced a similar problem? Does JCo 2.1.7 or other patches fix this issue?