JVM crash with JCo 2.1.6 on AIX 5.3

[former_member257109]

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.

Environment:

IBM Websphere 6.2

IBM JDK 1.4.2

JCo 2.1.6

AIX 5.3

Has anybody experienced a similar problem? Does JCo 2.1.7 or other patches fix this issue?

[Former Member]

Hi,

We have the same problem on AIX 5.3. Did you get any solution?