The WebLogic Administration Server does not start with the following exception in stdout/stderr logs:

The WebLogic Server did not start up properly.;

local class incompatible: stream classdesc serialVersionUID =7043852349133450673, local class serialVersionUID = 3875704819898565848
(;Ljava.lang.Class;Ljava.lang.ClassNotFoundException;;)V(Unknown Source)


Background & Analysis:

This problem occurred on an environment where WebLogic Server 8.1 was used with JRockit 1.5.



Use JRockit/Hotspot 1.4.x with WebLogic 8.1

Root Cause:

WebLogic 8.1 is incompatible with JRockit/Hotspot JVM 1.5 and later versions.


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Filed under: Middleware

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