ResourceLimitException

Question

Hello,
I'm getting the ResourceLimitException during load testing an application, and I hope to find out why I'm getting it here.
Platform:
WL81SP5, Oracle 10g (non-XA driver v10.2.0.1.0), Spring 1.2.8, Hibernate 3.1.3.
Data Source Settings:
Honor Global Transactions=true
Emulate Two Phase Commit=true
Connection Pool Settings:
min=max=50
Connection Reserver Timeout=10sec
JTA Transaction Timeout=300
In my load test script I create 100 user threads all trying to execute a db intensive operation on the server. I have noticed that sometimes I get the ResourceLimitException even before I hit 300 secs (JTA Transaction Timeout). I want to set the Connection Reserver Timeout to a greater value, but BEA website says that if you're using global transactions then conn. reserver timeout is ignored - "If you use global transactions, the Connection Reserve Timeout value is ignored. In this situation, a connection request automatically waits for a connection if one is not available. The amount of time available for an application to wait for a connection (if necessary), connect, and complete the transaction is determined by the transaction time out value."
Based on this, I am wondering why the threads are not waiting for at least 300 seconds to get a new connection from the pool?
Below is the nohup output from my server -
[blah] 2007-Aug-23 12:35:15 ERROR [ExecuteThread: '9' for queue: 'weblogic.kernel.Default'] JDBCExceptionReporter.logExceptions(72) | weblogic.common.resourcepool.ResourceLimitException: No resources currently available in pool marketplacePool to allocate to applications, please increase the size of the pool and retry..
[blah] 2007-Aug-23 12:35:15 ERROR [ExecuteThread: '9' for queue: 'weblogic.kernel.Default'] JDBCExceptionReporter.logExceptions(72) | Cannot obtain connection: driverURL = jdbc:weblogic:pool:marketplacePool, props = {enableTwoPhaseCommit=true, connectionPoolID=marketplacePool, jdbcTxDataSource=true, dataSourceName=marketplaceDataSourceTx}
Ref - http://e-docs.bea.com/wls/docs81/jdbc/programming.html

Answer 1

Sledge Hammer wrote:
Hello,
I'm getting the ResourceLimitException during load testing an application, and I hope to find out why I'm getting it here.
Platform:
WL81SP5, Oracle 10g (non-XA driver v10.2.0.1.0), Spring 1.2.8, Hibernate 3.1.3.
Data Source Settings:
Honor Global Transactions=true
Emulate Two Phase Commit=true
Connection Pool Settings:
min=max=50
Connection Reserver Timeout=10secShow me the whole pool configuration. Also,
is your JDBC usage coded to get, use, and close
a JDBC connection all within a given invocation,
and to close the connection without fail, regardless
of any exception, failure or exit path?
Joe
>
JTA Transaction Timeout=300
In my load test script I create 100 user threads all trying to execute a db intensive operation on the server. I have noticed that sometimes I get the ResourceLimitException even before I hit 300 secs (JTA Transaction Timeout). I want to set the Connection Reserver Timeout to a greater value, but BEA website says that if you're using global transactions then conn. reserver timeout is ignored - "If you use global transactions, the Connection Reserve Timeout value is ignored. In this situation, a connection request automatically waits for a connection if one is not available. The amount of time available for an application to wait for a connection (if necessary), connect, and complete the transaction is determined by the transaction time out value."
Based on this, I am wondering why the threads are not waiting for at least 300 seconds to get a new connection from the pool?
Below is the nohup output from my server -
[blah] 2007-Aug-23 12:35:15 ERROR [ExecuteThread: '9' for queue: 'weblogic.kernel.Default'] JDBCExceptionReporter.logExceptions(72) | weblogic.common.resourcepool.ResourceLimitException: No resources currently available in pool marketplacePool to allocate to applications, please increase the size of the pool and retry..
[blah] 2007-Aug-23 12:35:15 ERROR [ExecuteThread: '9' for queue: 'weblogic.kernel.Default'] JDBCExceptionReporter.logExceptions(72) | Cannot obtain connection: driverURL = jdbc:weblogic:pool:marketplacePool, props = {enableTwoPhaseCommit=true, connectionPoolID=marketplacePool, jdbcTxDataSource=true, dataSourceName=marketplaceDataSourceTx}
Ref - http://e-docs.bea.com/wls/docs81/jdbc/programming.html