[jboss-user] [Datasource Configuration] - Re: Maximum Database connection issue in JBoss 5.1
Anil Mathew
do-not-reply at jboss.com
Mon Apr 30 20:37:46 EDT 2012
Anil Mathew [https://community.jboss.org/people/amathewjboss1] created the discussion
"Re: Maximum Database connection issue in JBoss 5.1"
To view the discussion, visit: https://community.jboss.org/message/733101#733101
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Thank You so much for the response.
The main problem is what you mentioned above. i.e when this issue happens we DO NOT have 4*275 concurrent request (clients). This is why i really can't figure out how we are reaching this maximum "in use connection count".
We don't have a <blocking-timeout-millis> entry in the ds file, which means it is using the default (i.e 30 seconds).
We did 2 of the above which you mentioned as a workaround. i.e added more jboss instances, limited the number of web sessions. These changes did in fact improved our situation but we still reach the "maximum in use connection count".
Also i wanted to share this link with you - - https://issues.jboss.org/browse/JBAS-4047. I got this as a reply for my posting.
Like it is mentioned in the above Jboss URL:
“The PooledInvokerProxy lock is held while getting an available connection from the pool and while the connection is tested. If the connection is to a local (machine) process, it may not take long for the server ACK to arrive. If the connection is to a remote (machine) process, it could take longer depending on network latency (especially if a wan is between tiers). “
My thought is that when the ACK server call (since we are using PooledInvoker) isslow, many threads will wait for a connection.
Again thanks for your time.
Anil Mathew
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