Fix (APAR): PI11425 Status: Fix Release: 8.5.5.2 Operating System: AIX,HP-UX,IBM i,Inspur K-UX,Linux,Solaris,Windows,iOS,z/OS Supersedes Fixes: CMVC Defect: xxxxxx Byte size of APAR: 256394 Date: 2016-01-06 Abstract: ConcurrentModificationException in CreationalContextImpl under load Description/symptom of problem: PI11425 resolves the following problem: ERROR DESCRIPTION: Under very high load, a java.util.ConcurrentModificationException might be thrown by org.apache.webbeans.context.creational.CreationalContextImpl. LOCAL FIX: na PROBLEM SUMMARY USERS AFFECTED: IBM WebSphere Application Server Full Profile versions 8.0 and 8.5.5 users of Contexts and Dependency Injection (CDI). PROBLEM DESCRIPTION: CreationalContextImpl incorrectly synchronizes updates to an internal Map leading to problems in a multi-threaded environment RECOMMENDATION: None The CDI implementation incorrectly synchronizes updates to an internal Map, which might lead to a java.util.ConcurrentModificationException. The exception might look like the one below: Caused by: java.util.ConcurrentModificationException at java.util.WeakHashMap$HashIterator.next(WeakHashMap.java:244) at org.apache.webbeans.context.creational.CreationalContextImpl.rem oveAllDependents(CreationalContextImpl.java:368) PROBLEM CONCLUSION: The CDI implementation was modified to correctly synchronize its activity in CreationalContextImpl to avoid the ConcurrentModificationException. The fix for this APAR is currently targeted for inclusion in fix packs 8.0.0.9 and 8.5.5.3. Please refer to the Recommended Updates page for delivery information: http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980 Directions to apply fix: Fix applies to Editions: Release 8.5 X Application Server (Express or BASE) X Network Deployment (ND) Install Fix to all WebSphere installations unless special instructions are included below. Special Instructions: None NOTE: The user must: * Logged in with the same authority level when unpacking a fix, fix pack or refresh pack. * Be at V1.4.3 or newer of the Installation Manager. Certain iFixes may require a newer version of the Installation Manager and the Installation Manager will inform you during the installation process if a newer version is required. The IBM Knowledge Center can provide details, if needed, on the use of the Installation Manager to apply the iFixes. http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp. Shutdown WebSphere Application Server before applying the iFixes. Restart WebSphere Application Server after applying the iFixes. Directions to remove fix: The IBM Knowledge Center can provide details, if needed, on the use of the Installation Manager to remove the iFixes. http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp. Shutdown WebSphere Application Server before removing the iFixes. Restart WebSphere Application Server after removing the iFixes. Directions to re-apply fix: 1) Shutdown WebSphere Application Server. 2) Follow the Fix instructions to apply the fix. 3) Restart WebSphere Application Server. Additional Information: