The Administration server of a WebLogic domain comprising WebLogic Server 10.0 and WebLogic Integration 10.2, consumes high CPU and throws java.lang.OutOfMemory errors.



The WebLogic Domain’s admin server had only two web applications deployed on it – the WebLogic Administration console and WebLogic Integration console. After start-up, its CPU utilization gradually increased and reached around 80% within a couple of days. Also, java.lang.OutOfMemory errors were observed in the server logs. This behaviour was observed even when there was no load on the managed servers and the web applications on the admin server were not accessed (all servers idle from a user perspective).

WebLogic Domain details:

Version: WebLogic Server 10.0 MP1, WebLogic Integration 10.2
JVM: JRockit R27.5.0-110 (JRE Standard Edition build 1.5.0_14-b03)
Admin Server JVM Heap: Minimum (Xms) = Maximum (Xmx) = 2 GB
Number of managed servers: 2
Operating System: 64-bit Red Hat Enterprise Linux 5.1
CPU Architecture: AMD64



The following patches were applied and the problem was resolved. Contact Oracle support or use their Smart Update procedure to obtain the patches.

1. D76T CR380997 Admin server gives OOM: Closed the Queue and Session Objects properly.
2. LJTR CR373884 Unable to apply some of the patches for jpd.jar when using "inject" mechanism
3. ZSX5 BUG8174387 MEMORY LEAK OBSERVED ON ADMIN SERVER: No public details available. Patch provided for WLI 10.2


Root Cause:

Known issues with WebLogic Integration 10.2



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