Hello,

I am using jbpm-6.0.1 with h2 db. i am running some process as sub-process. when it assigned to human task and return back to main process, i am getting this error.

once this error occurs then jboss get down. there is no option without restart.

Please suggest me to resolve this error.

21:57:40,008 WARN  [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (pool-19-thread-1) SQL Error: 0, SQLState: null

21:57:40,016 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (pool-19-thread-1) javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/jbpmDS

21:57:40,050 WARN  [org.jbpm.shared.services.impl.TransactionalCommandService] (pool-19-thread-1) Could not commit session: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Could not open connection

    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1361) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1289) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:313) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]

    at org.jbpm.shared.services.impl.JpaPersistenceContext.queryStringWithParameters(JpaPersistenceContext.java:151) [jbpm-shared-services-6.0.1.Final.jar:6.0.1.Final]

    at org.jbpm.shared.services.impl.JpaPersistenceContext.queryAndLockWithParametersInTransaction(JpaPersistenceContext.java:37) [jbpm-shared-services-6.0.1.Final.jar:6.0.1.Final]

    at org.jbpm.executor.impl.ExecutorQueryServiceImpl$LockAndUpdateRequestInfoCommand.execute(ExecutorQueryServiceImpl.java:217) [jbpm-executor-6.0.1.Final.jar:6.0.1.Final]

    at org.jbpm.executor.impl.ExecutorQueryServiceImpl$LockAndUpdateRequestInfoCommand.execute(ExecutorQueryServiceImpl.java:204) [jbpm-executor-6.0.1.Final.jar:6.0.1.Final]

    at org.jbpm.shared.services.impl.TransactionalCommandService.execute(TransactionalCommandService.java:38) [jbpm-shared-services-6.0.1.Final.jar:6.0.1.Final]

    at org.jbpm.executor.impl.ExecutorQueryServiceImpl.getRequestForProcessing(ExecutorQueryServiceImpl.java:199) [jbpm-executor-6.0.1.Final.jar:6.0.1.Final]

    at org.jbpm.executor.impl.ExecutorRunnable.run(ExecutorRunnable.java:83) [jbpm-executor-6.0.1.Final.jar:6.0.1.Final]

    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [rt.jar:1.7.0_45]

    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304) [rt.jar:1.7.0_45]

    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178) [rt.jar:1.7.0_45]

    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [rt.jar:1.7.0_45]

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]

    at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]

Caused by: org.hibernate.exception.GenericJDBCException: Could not open connection

    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:52) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:304) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:169) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.proxy.ConnectionProxyHandler.extractPhysicalConnection(ConnectionProxyHandler.java:82) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.proxy.ConnectionProxyHandler.continueInvocation(ConnectionProxyHandler.java:138) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at com.sun.proxy.$Proxy45.prepareStatement(Unknown Source)

    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:147) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:166) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:145) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1739) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.Loader.doQuery(Loader.java:828) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:289) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.Loader.doList(Loader.java:2463) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.Loader.doList(Loader.java:2449) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2279) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.Loader.list(Loader.java:2274) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:196) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1115) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:280) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]

    ... 14 more

Caused by: java.sql.SQLException: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/jbpmDS

    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:137)

    at org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider.getConnection(InjectedDataSourceConnectionProvider.java:67) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:276) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:297) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

    ... 35 more

Caused by: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/jbpmDS

    at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:390)

    at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:368)

    at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:464)

    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:129)

    ... 38 more

Caused by: javax.resource.ResourceException: IJ000655: No managed connections available within configured blocking timeout (30000 [ms])

    at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:377)

    at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getTransactionNewConnection(AbstractPool.java:495)

    at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:374)

    at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:329)

    ... 41 more

Thanks in advance,

Pankaj Mishra