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Java Agent

Starting with JDK 1.5, the javaagent feature has been around which provides for a hook to get access to the classes as they are loaded and consequently do instrumentation of the class to serve your purpose. This along with Javassist will allow you to achieve some useful tasks like enabling specific debugging etc. Below are some useful links for the same http://www.csg.ci.i.u-tokyo.ac.jp/~chiba/javassist/tutorial/tutorial.html http://blog.javabenchmark.org/2013/05/java-instrumentation-tutorial.html https://today.java.net/article/2008/04/22/add-logging-class-load-time-java-instrumentation I used to face issues related to the agent class not been able to find javassist related classes. To tackle this you can add an index file to the agent jar like below. jar -i agent.jar lib\javassist.jar and ensure that during deployment the javassist.jar file is in the lib folder which itselfs exists in the same directory as the agent jar. The  insertBefore and  insertAfter method...
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Exception in AppMerge flows' progression - Unable to resolve deadlock in factory claims [WebLogic 12.1.1]

While deploying my EAR which included a WAR, I was getting the following errors. While searching on the net for possible solutions to the issue, came across a post which indicated that the following setting for the domain was the cause for the same. The setting needs to be deselected. I tried the below url for steps to disable the setting for the domain that I had already created. http://stackoverflow.com/questions/12219782/how-do-you-turn-off-sip-support-in-weblogic-server-12c But that did not help. I then created a new domain and ensured that the setting was unchecked. This resolved the issue.
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