hi,
I'm experiencing problems when using JBoss CMP on top of Firebird. I'm not
sure, wheather this is JBoss topic or if it's an issue of the driver/db. I'm
trying to get information from the firebird forums on this topic as well, but
any hints would be highly appreciated - like explaining what does the exception
I'm getting means from the JBoss side..
The exception looks like this:
| org.firebirdsql.jdbc.FBSQLException: Problem getting connection:
org.jboss.resource.JBossResourceException: Could not enlist in transaction on
entering meta-aware object!; - nested throwable:
(javax.transaction.SystemException: java.lang.Throwable: Unabled to enlist
resource, see the previous warnings. tx=TransactionImpl:XidImpl[FormatId=257,
GlobalId=jarchive.nem.homolka.cz/6929968, BranchQual=, localId=6929968])
| at
org.firebirdsql.jdbc.FBDataSource.getConnection(FBDataSource.java:88)
| at
org.jboss.ejb.plugins.cmp.jdbc.JDBCAbstractQueryCommand.execute(JDBCAbstractQueryCommand.java:210)
| at
org.jboss.ejb.plugins.cmp.jdbc.JDBCAbstractQueryCommand.execute(JDBCAbstractQueryCommand.java:128)
| at
org.jboss.ejb.plugins.cmp.jdbc.JDBCFindEntitiesCommand.execute(JDBCFindEntitiesCommand.java:40)
| at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.findEntities(JDBCStoreManager.java:598)
| at
org.jboss.ejb.plugins.CMPPersistenceManager.findEntities(CMPPersistenceManager.java:322)
| at
org.jboss.resource.connectionmanager.CachedConnectionInterceptor.findEntities(CachedConnectionInterceptor.java:245)
| ...
|
The exception occurs when the server is under heavy load and gets excessive
after some time... It runs JBoss 4.0.3SP1 and FB superserver 2 RC 1.
This is my Datasource config snippet:
| <tx-connection-factory>
|
| <jndi-name>FirebirdDS</jndi-name>
|
| <xa-transaction/>
|
| <rar-name>jaybird-2.0.1.rar</rar-name>
| <connection-definition>javax.sql.DataSource</connection-definition>
|
| <config-property name="Database"
type="java.lang.String">localhost:${jboss.server.data.dir}/firebird/data.fdb</config-property>
|
| <min-pool-size>20</min-pool-size>
| <max-pool-size>100</max-pool-size>
|
| <idle-timeout-minutes>10</idle-timeout-minutes>
|
| <blocking-timeout-millis>5000</blocking-timeout-millis>
|
| <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml
(optional) -->
| <metadata>
| <type-mapping>Firebird</type-mapping>
| </metadata>
| </tx-connection-factory>
|
The whole thing looks like some kind of a connection leak, but as all the data
access is done by CMP engine, it's difficult for me to track it down.
Thanks for amy assistance or ideas.
-- petr kalina
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