[jboss-user] [Datasource Configuration] - Re: Maximum Database connection issue in JBoss 5.1

Wolf-Dieter Fink do-not-reply at jboss.com
Wed Apr 25 05:09:38 EDT 2012

Wolf-Dieter Fink [https://community.jboss.org/people/wdfink] created the discussion

"Re: Maximum Database connection issue in JBoss 5.1"

To view the discussion, visit: https://community.jboss.org/message/732054#732054

I suppose you have more than 4*275 clients.
After yoiu reach InUseConnectionCount=275 on one instance the next calls to a connection will wait the 'BlockingTimeout' of the DS configuration.
This will often end up in such situations, many threads are waiting for a connection and block memory and resources, the GC can not free memory, the server gets slower and you will have a crash because of too much GC load.

You might
- increase the number of connections
  might not help because you must handle the number of threads in one instance (maybe increase memory)
- add JBoss instances
- limit the number of web sessions

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