unable to get managed connection with java hibernate jboss 5.1

Hi , i have a issue reported with jboss 5.1, linux and java based hibernate ,oracle 11.2.3.0 DB,Hibernate 3.3.2.GA

while load testing for application for jboss on one JVM load balanced on each server ( i.e 2 JVM) heap 1.5 GB

while running test for 200 users i was able to perform the test successfully .

as i increase the amount of users to 400 after exact 20 mins of test i start getting errors as unable to get managed connection

following is the ds.xml file into

min-pool-size>1</min-pool-size>
<max-pool-size>64</max-pool-size>
<query-timeout>300</query-timeout>
<idle-timeout-minutes>0</idle-timeout-minutes>
<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>

2012-05-19 02:54:01,406 INFO [org.hibernate.cfg.SettingsFactory] (main) Automatic flush during beforeCompletion(): disabled
2012-05-19 02:54:01,406 INFO [org.hibernate.cfg.SettingsFactory] (main) Automatic session close at end of transaction: disabled
2012-05-19 02:54:01,407 INFO [org.hibernate.cfg.SettingsFactory] (main) Scrollable result sets: enabled
2012-05-19 02:54:01,407 INFO [org.hibernate.cfg.SettingsFactory] (main) JDBC3 getGeneratedKeys(): disabled
2012-05-19 02:54:01,407 INFO [org.hibernate.cfg.SettingsFactory] (main) Connection release mode: auto
2012-05-19 02:54:01,408 INFO [org.hibernate.cfg.SettingsFactory] (main) Default batch fetch size: 4
2012-05-19 02:54:01,409 INFO [org.hibernate.cfg.SettingsFactory] (main) Generate SQL with comments: disabled
2012-05-19 02:54:01,409 INFO [org.hibernate.cfg.SettingsFactory] (main) Order SQL updates by primary key: disabled
2012-05-19 02:54:01,409 INFO [org.hibernate.cfg.SettingsFactory] (main) Order SQL inserts for batching: disabled
2012-05-19 02:54:01,409 INFO [org.hibernate.cfg.SettingsFactory] (main) Query translator: org.hibernate.hql.ast.ASTQueryTranslatorF
actory
2012-05-19 02:54:01,413 INFO [org.hibernate.hql.ast.ASTQueryTranslatorFactory] (main) Using ASTQueryTranslatorFactory
2012-05-19 02:54:01,413 INFO [org.hibernate.cfg.SettingsFactory] (main) Query language substitutions: {}
2012-05-19 02:54:01,413 INFO [org.hibernate.cfg.SettingsFactory] (main) JPA-QL strict compliance: disabled
2012-05-19 02:54:01,413 INFO [org.hibernate.cfg.SettingsFactory] (main) Second-level cache: disabled
2012-05-19 02:54:01,413 INFO [org.hibernate.cfg.SettingsFactory] (main) Query cache: disabled
2012-05-19 02:54:01,413 INFO [org.hibernate.cfg.SettingsFactory] (main) Cache region factory : org.hibernate.cache.impl.NoCachingRe
gionFactory
2012-05-19 02:54:01,413 INFO [org.hibernate.cfg.SettingsFactory] (main) Optimize cache for minimal puts: disabled
2012-05-19 02:54:01,413 INFO [org.hibernate.cfg.SettingsFactory] (main) Structured second-level cache entries: disabled
2012-05-19 02:54:01,422 INFO [org.hibernate.cfg.SettingsFactory] (main) Statistics: disabled
2012-05-19 02:54:01,423 INFO [org.hibernate.cfg.SettingsFactory] (main) Deleted entity synthetic identifier rollback: disabled
2012-05-19 02:54:01,423 INFO [org.hibernate.cfg.SettingsFactory] (main) Default entity-mode: pojo
2012-05-19 02:54:01,423 INFO [org.hibernate.cfg.SettingsFactory] (main) Named query checking : enabled

error msg

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)
at com.pepsico.mya.bonus.domain.verification.VerificationRecordCalcSheet.populateBonusRecordDetails(VerificationRecordCalcSh
eet.java:153)
at com.pepsico.mya.bonus.domain.verification.VerificationRecordCalcSheet.getEmployeeRecordsFromForecast(VerificationRecordCa
lcSheet.java:60)
at com.pepsico.mya.bonus.domain.verification.VerificationRecordCalcSheet.getCurrentVerificationRecord(VerificationRecordCalc
Sheet.java:34)
at com.pepsico.mya.bonus.struts.verification.ViewVerificationSheetAction.execute(ViewVerificationSheetAction.java:168)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.RoleModeFilter.doFilter(RoleModeFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.security.SecurityContextFilter.doFilter(SecurityContextFilter.java:138)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.LocaleFilter.doFilter(LocaleFilter.java:59)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.ApplicationContextFilter.doFilter(ApplicationContextFilter.java:86)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.SessionSettingsFilter.doFilter(SessionSettingsFilter.java:187)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:124)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:8
1)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:436)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:384)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)
at java.lang.Thread.run(Thread.java:662)
Caused by: org.jboss.util.NestedSQLException: Unable to get managed connection for jdbc/mya/bonusPool; - nested throwable: (javax.re
source.ResourceException: Unable to get managed connection for jdbc/mya/bonusPool)
at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:95)
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java
:82)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
... 84 more
Caused by: javax.resource.ResourceException: Unable to get managed connection for jdbc/mya/bonusPool
at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:441)
at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:424)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:496)
at org.jboss.resource.connectionmanager.BaseConnectionManager2$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
2012-05-19 03:36:46,258 ERROR [com.pepsico.mya.bonus.exception.ApplicationException] (ajp-lrhisa02.hewitt.com%2F10.20.95.36-12002-17
6) Entity is still being used in the application.
2012-05-19 03:36:46,262 ERROR [com.pepsico.mya.bonus.exception.BusinessException] (ajp-lrhisa02.hewitt.com%2F10.20.95.36-12002-176)
Entity is still being used in the application.
2012-05-19 03:36:40,158 ERROR [com.pepsico.mya.bonus.struts.calcsheet.CalculationSheetLoadAction] (ajp-lrhisa02.hewitt.com%2F10.20.9
5.36-12002-156) Unable to create verification record sheet
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)
at com.pepsico.mya.bonus.domain.verification.VerificationRecordCalcSheet.populateBonusRecordDetails(VerificationRecordCalcSh
eet.java:153)
at com.pepsico.mya.bonus.domain.verification.VerificationRecordCalcSheet.getEmployeeRecordsFromForecast(VerificationRecordCa
lcSheet.java:60)
at com.pepsico.mya.bonus.domain.verification.VerificationRecordCalcSheet.getCurrentVerificationRecord(VerificationRecordCalc
Sheet.java:34)
at com.pepsico.mya.bonus.struts.verification.ViewVerificationSheetAction.execute(ViewVerificationSheetAction.java:168)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:444)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:382)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:310)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1078)
at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:295)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:396)
at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:347)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:232)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.RoleModeFilter.doFilter(RoleModeFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.security.SecurityContextFilter.doFilter(SecurityContextFilter.java:138)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.LocaleFilter.doFilter(LocaleFilter.java:59)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.ApplicationContextFilter.doFilter(ApplicationContextFilter.java:86)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.pepsico.mya.bonus.webapp.SessionSettingsFilter.doFilter(SessionSettingsFilter.java:187)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)

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)
... 99 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$ConnectionManagerProxy.allocateConnection(BaseConnectionManag
er2.java:941)
at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:89)
... 101 more
Caused by: javax.resource.ResourceException: No ManagedConnections available within configured blocking timeout ( 50000 [ms] )
at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:311)
at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:69
0)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:404)
... 105 more
2012-05-19 03:36:40,198 ERROR [com.pepsico.mya.bonus.struts.calcsheet.CalculationSheetLoadAction] (ajp-lrhisa02.hewitt.com%2F10.20.9
5.36-12002-140) Unable to create verification record sheet
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)

Please provide some resolution for troubleshooting.