shirish maurya [https://community.jboss.org/people/shirishmaurya] created the discussion "Connection pool problem jboss 5.1 + hibernate oracle 11.2.3.0 DB,Hibernate 3.3.2.GA" To view the discussion, visit: https://community.jboss.org/message/742128#742128 -------------------------------------------------------------- issue with connection management for jboss 5.1 + hibernate, my hibrenate uses jndi name define for connection pooling, below is the hibernate configuration 03:29:45,068 INFO [SettingsFactory] Automatic flush during beforeCompletion(): disabled 03:29:45,068 INFO [SettingsFactory] Automatic session close at end of transaction: disabled 03:29:45,070 INFO [SettingsFactory] Scrollable result sets: enabled 03:29:45,070 INFO [SettingsFactory] JDBC3 getGeneratedKeys(): disabled 03:29:45,071 INFO [SettingsFactory] Connection release mode: auto 03:29:45,072 INFO [SettingsFactory] Default batch fetch size: 4 03:29:45,072 INFO [SettingsFactory] Generate SQL with comments: disabled 03:29:45,072 INFO [SettingsFactory] Order SQL updates by primary key: disabled 03:29:45,073 INFO [SettingsFactory] Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory 03:29:45,078 INFO [ASTQueryTranslatorFactory] Using ASTQueryTranslatorFactory 03:29:45,079 INFO [SettingsFactory] Query language substitutions: {} 03:29:45,079 INFO [SettingsFactory] JPA-QL strict compliance: disabled 03:29:45,079 INFO [SettingsFactory] Second-level cache: disabled 03:29:45,079 INFO [SettingsFactory] Query cache: disabled 03:29:45,079 INFO [SettingsFactory] Optimize cache for minimal puts: disabled 03:29:45,079 INFO [SettingsFactory] Structured second-level cache entries: disabled 03:29:45,092 INFO [SettingsFactory] Statistics: disabled i have also made a connection release mode to on close and track transation track statement  but no where it helps ds file config min-pool-size>8</min-pool-size> <max-pool-size>100</max-pool-size> <blocking-timeout-millis>50000</blocking-timeout-millis> <use-strict-min>true</use-strict-min> <track-statements>true</track-statements> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name> <metadata> <type-mapping>Oracle11g</type-mapping> </metadata> </local-tx-datasource> </datasources> after certain duration of time say 30 mins the connection problem arises, this happens as i increase the concuurent users. the connection are getting closed out from the code. also i see a lot of inactive session at DB end increase duration the test period. org.hibernate.exception.GenericJDBCException: Cannot open connection at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126) at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449) at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:161) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1577) at org.hibernate.loader.Loader.doQuery(Loader.java:696) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) at org.hibernate.loader.Loader.loadCollectionBatch(Loader.java:2057) at org.hibernate.loader.collection.BatchingCollectionInitializer.initialize(BatchingCollectionInitializer.java:70) at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:587) at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventL istener.java:83) at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1744) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108) at org.hibernate.collection.PersistentBag.iterator(PersistentBag.java:272) Caused by: org.jboss.util.NestedSQLException: Unable to get managed connection for jdbc/mya/bonusPool; - nested throwable: (javax.re source.ResourceException: Unable to get managed connection for jdbc/mya/bonusPool) at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:95) at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java :82) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) ... 84 more Caused by: javax.resource.ResourceException: Unable to get managed connection for jdbc/mya/bonusPool at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:441) at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:424) at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:496) at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManag er2.java:941) at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:89) ... 86 more Caused by: javax.resource.ResourceException: No ManagedConnections available within configured blocking timeout ( 50000 [ms] ) at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:311) at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:69 0) at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:404) ... 90 more is there any particular setting i m missing for hibernate or jboss. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/742128#742128] Start a new discussion in Datasource Configuration at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]