While making changes in jsp pages in eclipse IDE, i was continously getiing error:
java.io.FileNotFoundException:/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/work/Catalina/localhost/_/SESSIONS.ser
SEVERE: Exception unloading sessions to persistent storage
and I need to restart the server to run the application.
This was happening in linux machine.
After digging a lot I found its due to file permission problem.
So to remove this error just go to CATALINA_HOME/conf/context.xml
and uncomment
It was since Tomcat was not being able to load previously serialized web sessions that had been saved, may be because Tomcat didn't shutdown cleanly.
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