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From "Lionel Cons (Created) (JIRA)" <>
Subject [jira] [Created] (APLO-160) Apollo becoming unresponsive under stress test
Date Tue, 14 Feb 2012 13:31:01 GMT
Apollo becoming unresponsive under stress test

                 Key: APLO-160
             Project: ActiveMQ Apollo
          Issue Type: Bug
         Environment: apollo-1.1-20120209.032648-24
            Reporter: Lionel Cons

While running a stress test against apollo-1.1-20120209.032648-24 (many concurrent TCP connections),
the broker became unresponsive.

It logged several times: java.lang.OutOfMemoryError: GC overhead limit exceeded

It also logged other warnings, probably related:

2012-02-14 14:14:49,273 | WARN  | handle failed | | Apollo Task
2012-02-14 14:18:39,073 | WARN  | Problem scavenging sessions | org.eclipse.jetty.server.session
| HashSessionScavenger-0

It could not be stopped either, I had to kill -9 it.

What can be done to avoid these problems?

FWIW, java has been started with -server -Xmx8192m -Xms4096m

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