Hi all,
I am a JIRA n00b, have been using JIRA v4.4.1#660-r161644 with some plugins for a good month or so.
I've noticed sometimes our JIRA instance crashes for no apparent reason, and mostly after the last user has logged out of the system. The errors in the catalina.out log are all of the following form (apologies for the huge stacktrace):
2011-12-20 10:23:12,991 http-8080-7 ERROR anonymous 618x4653x5 - 78.22.102.159,10.0.0.242 /secure/Dashboard.jspa [NoModule] There was an error getting a DBCP datasource.
java.lang.RuntimeException: Unable to obtain a connection from the underlying connection pool
at org.ofbiz.core.entity.jdbc.interceptors.connection.ConnectionTracker.trackConnection(ConnectionTracker.java:59)
at org.ofbiz.core.entity.transaction.DBCPConnectionFactory.trackConnection(DBCPConnectionFactory.java:149)
at org.ofbiz.core.entity.transaction.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:69)
at org.ofbiz.core.entity.ConnectionFactory.tryGenericConnectionSources(ConnectionFactory.java:69)
at org.ofbiz.core.entity.transaction.JNDIFactory.getConnection(JNDIFactory.java:146)
at org.ofbiz.core.entity.TransactionFactory.getConnection(TransactionFactory.java:101)
at org.ofbiz.core.entity.ConnectionFactory.getConnection(ConnectionFactory.java:59)
at org.ofbiz.core.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:367)
at org.ofbiz.core.entity.GenericDAO.insert(GenericDAO.java:98)
at org.ofbiz.core.entity.GenericHelperDAO.create(GenericHelperDAO.java:64)
at org.ofbiz.core.entity.GenericDelegator.create(GenericDelegator.java:489)
at org.ofbiz.core.entity.GenericDelegator.create(GenericDelegator.java:469)
at org.ofbiz.core.entity.GenericValue.create(GenericValue.java:80)
at com.atlassian.crowd.embedded.ofbiz.db.OfBizHelper.createValue(OfBizHelper.java:162)
at com.atlassian.crowd.embedded.ofbiz.OfBizUserDao.storeAttributeValue(OfBizUserDao.java:290)
at com.atlassian.crowd.embedded.ofbiz.OfBizUserDao.storeAttributeValues(OfBizUserDao.java:267)
at com.atlassian.crowd.embedded.ofbiz.OfBizUserDao.storeAttributes(OfBizUserDao.java:250)
at com.atlassian.crowd.directory.AbstractInternalDirectory.storeUserAttributes(AbstractInternalDirectory.java:519)
at com.atlassian.crowd.manager.directory.DirectoryManagerGeneric.storeUserAttributes(DirectoryManagerGeneric.java:387)
at com.atlassian.crowd.manager.application.ApplicationServiceGeneric.storeUserAttributes(ApplicationServiceGeneric.java:509)
at com.atlassian.crowd.embedded.core.CrowdServiceImpl.setUserAttribute(CrowdServiceImpl.java:375)
at com.atlassian.crowd.embedded.core.CrowdServiceImpl.setUserAttribute(CrowdServiceImpl.java:363)
at com.atlassian.crowd.embedded.core.DelegatingCrowdService.setUserAttribute(DelegatingCrowdService.java:100)
at com.atlassian.crowd.embedded.core.FilteredCrowdServiceImpl.setUserAttribute(FilteredCrowdServiceImpl.java:43)
at com.atlassian.jira.security.login.LoginStoreImpl.setLong(LoginStoreImpl.java:136)
at com.atlassian.jira.security.login.LoginStoreImpl.recordLoginAttempt(LoginStoreImpl.java:59)
at com.atlassian.jira.security.login.LoginManagerImpl.recordLoginAttempt(LoginManagerImpl.java:321)
at com.atlassian.jira.security.login.LoginManagerImpl.onLoginAttempt(LoginManagerImpl.java:203)
at com.atlassian.jira.security.login.JiraElevatedSecurityGuard.onSuccessfulLoginAttempt(JiraElevatedSecurityGuard.java:34)
at com.atlassian.seraph.auth.DefaultAuthenticator.getUserFromCookie(DefaultAuthenticator.java:467)
at com.atlassian.seraph.auth.DefaultAuthenticator.getUser(DefaultAuthenticator.java:327)
at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:125)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:98)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:150)
at com.atlassian.jira.web.filters.JiraLoginFilter.doFilter(JiraLoginFilter.java:70)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
at com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:71)
at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:99)
at com.atlassian.jira.web.filters.JIRAProfilingFilter.doFilter(JIRAProfilingFilter.java:19)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:71)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:350)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.gzipfilter.GzipFilter.doFilterInternal(GzipFilter.java:75)
at com.atlassian.gzipfilter.GzipFilter.doFilter(GzipFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
at com.sysbliss.jira.plugins.workflow.servlet.JWDSendRedirectFilter.doFilter(JWDSendRedirectFilter.java:25)
at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.jira.web.filters.steps.ChainedFilterStepRunner.doFilter(ChainedFilterStepRunner.java:74)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.core.filters.cache.AbstractCachingFilter.doFilter(AbstractCachingFilter.java:33)
at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.core.filters.encoding.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:41)
at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
at com.atlassian.jira.web.filters.PathMatchingEncodingFilter.doFilter(PathMatchingEncodingFilter.java:49)
at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.jira.web.monitor.ActiveRequestsFilter$PassToChainFilterFunc.doFilter(ActiveRequestsFilter.java:346)
at com.atlassian.jira.web.monitor.ActiveRequestsFilter$DebugLogFilterFunc.doFilter(ActiveRequestsFilter.java:463)
at com.atlassian.jira.web.monitor.ActiveRequestsFilter.doFilter(ActiveRequestsFilter.java:173)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.jira.startup.JiraStartupChecklistFilter.doFilter(JiraStartupChecklistFilter.java:75)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.multitenant.servlet.MultiTenantServletFilter.doFilter(MultiTenantServletFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.atlassian.jira.web.filters.steps.ChainedFilterStepRunner.doFilter(ChainedFilterStepRunner.java:74)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:554)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool exhausted, cause: Timeout waiting for idle object
at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:148)
at org.ofbiz.core.entity.transaction.DBCPConnectionFactory$1.call(DBCPConnectionFactory.java:153)
at org.ofbiz.core.entity.transaction.DBCPConnectionFactory$1.call(DBCPConnectionFactory.java:150)
at org.ofbiz.core.entity.jdbc.interceptors.connection.ConnectionTracker.trackConnection(ConnectionTracker.java:53)
... 114 more
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:801)
at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:140)
... 117 more
I am wondering whether this could be a configuration issue or rather something else, perhaps more structural? I only found old (fixed) issues within the existing JIRA tracker relating to one of the above errors... And it is rather annoying to have our JIRA server dying on us from time to time 
Anyone have an idea of what could be going on, and how to solve it?