Connection handle has been closed and is unusable

[jasmineseed]

we have an application deployed on Jboss 4.0.2. Using PostgreSql 8 and DAO pattern.
I have taken all care to close the resultSets, Prepared Statement and Connection object.

Also we r using Jboss Connection pooling as :

<min-pool-size>5</min-pool-size>
<max-pool-size>150</max-pool-size>
<idle-timeout-minutes>10</idle-timeout-minutes>
<check-valid-connection-sql>select 1</check-valid-connection-sql>

Still during Stress testing (10 simultaneous users) getting following errors for 3 executions out of 10:


1)
sepa.aff.AFFException: Connection handle has been closed and is unusable
at com.ail.sepa.aff.businesslogic.dao.CategoryImpl.findByCategoryId(CategoryImpl.java:801)
at com.ail.sepa.aff.businesslogic.command.GetSiteDetails.executeInternal(GetSiteDetails.java:116)
at com.ail.sepa.aff.businesslogic.command.AffCommand.execute(AffCommand.java:42)
at com.ail.sepa.aff.businesslogic.AffManagerBean.getSiteDetails(AffManagerBean.java:342)
at sun.reflect.GeneratedMethodAccessor215.invoke(Unknown Source)

2)
org.postgresql.util.PSQLException: This statement has been closed.
at org.postgresql.jdbc2.AbstractJdbc2Statement.checkClosed(AbstractJdbc2Statement.java:2390)
at org.postgresql.jdbc2.AbstractJdbc2Statement.getMaxRows(AbstractJdbc2Statement.java:521)
at org.postgresql.jdbc3.Jdbc3Statement.createResultSet(Jdbc3Statement.java:36)
at org.postgresql.jdbc2.AbstractJdbc2Statement$StatementResultHandler.handleResultRows(AbstractJdbc2Statement.java:188)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1270)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:430)

Thanks in advance
[e-mail]

[weston.price]

http://forum.java.sun.com/thread.jspa?threadID=782570