Concurrent Modification of the Map Variable "Tms" (Target Module States) in DeploymentState

(Doc ID 2119093.1)

Last updated on NOVEMBER 05, 2016

Applies to:

Oracle WebLogic Server - Version 12.1.2.0.0 and later
Information in this document applies to any platform.

Symptoms

 You have observed occasional failures during application deployment on WLS 12c which results in:

In all these cases, the Java Heap Dump shows broken HashMap stored in field 'tms' of class 'weblogic.deploy.internal.targetserver.server.state.DeploymentState' - some of its entries are cycled (see screenshot 'Broken-Hashmap.png' from Eclipse Memory Analyzer).

 

 

Such situation is usually a result of non-synchronized concurrent access to HashMap. As result of this issue, the server or application becomes completely unusable and need to be recycled.  This problem is not easily reproducible.

 

Cause

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