THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Apache Geronimo v2.1 is Java EE 5 certified. With that said, it will likely run on different JVM versions however the results may be unpredictable. Whenever possible use jdk 1.5.
Port
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conflicts
The second most common startup issue is associated to port conflicts, check no other application is using or blocking Geronimo's default ports:
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