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AlienQueen
 Post subject: CannotAcquireResourceException (once more)
PostPosted: Mon Dec 04, 2006 7:11 pm 
Newbie

Joined: Mon Dec 04, 2006 5:45 pm
Posts: 4
Location: Bordeaux, France
[excuse me for this double posting... can't figure out how to delete this post...]

Hello all !

I'm using Hibernate 3.2 / Struts 1.2.9 / Eclipse 3.2 and MySQL 5.0.18.16

I'm working on a Tomcat 5.5 webapp. Lauching and using it works fine except after some times Hibernate throws a

CannotAcquireResourceException : com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@11d3ec8 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).


Here's my hibernate.cfg.xml

Code:
<?xml version="1.0"?>

<!DOCTYPE hibernate-configuration PUBLIC
   "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
   "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

   <session-factory>
      <!-- local connection properties -->
      <property name="hibernate.connection.url">
         jdbc:mysql://localhost:3306/travis
      </property>
      <property name="hibernate.connection.driver_class">
         com.mysql.jdbc.Driver
      </property>
      <property name="hibernate.connection.username">zap</property>
      <property name="hibernate.connection.password">zap</property>
      <property name="dialect">
         org.hibernate.dialect.MySQLDialect
      </property>



        <!-- Use the C3P0 connection pool. -->
      <property name="c3p0.min_size">5</property>
        <property name="c3p0.max_size">50</property>
        <property name="c3p0.timeout">5000</property>
        <property name="c3p0.max_statements">400</property>
        <property name="c3p0.idle_test_period">1800</property>
        <property name="c3p0.maxAdministrativeTaskTime">5000</property>
        <property name="c3p0.breakAfterAcquireFailure">false</property>

        <property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>

        <!-- Disable second-level cache.  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
        <property name="cache.use_query_cache">false</property>
        <property name="cache.use_minimal_puts">false</property>
        <property name="max_fetch_depth">3</property>

        <!-- Print SQL to stdout. -->
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>

        <!-- Bind the getCurrentSession() method to the thread. -->
        <property name="current_session_context_class">thread</property>


      <mapping resource="zap.hbm.xml" />
   </session-factory>
</hibernate-configuration>



It is inspired from this document :

Hibernate tuto




Now, here's the Full stack trace of any exception that occurs:

Code:
WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@5966f -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:07 WARN  [SettingsFactory] Could not obtain connection metadata
java.sql.SQLException: Connections could not be acquired from the underlying database!
   at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:236)
   at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
   at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
   at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:76)
   at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2006)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1289)
   at asp.consignes.base._BaseRootDAO.initialize(_BaseRootDAO.java:101)
   at asp.consignes.base._BaseRootDAO.initialize(_BaseRootDAO.java:88)
   at asp.consignes.base._BaseRootDAO.initialize(_BaseRootDAO.java:79)
   at asp.consignes.InitActionConsignesFormulaire.execute(InitActionConsignesFormulaire.java:45)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
   at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
   at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
   at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
   at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:970)
   at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
   ... 42 more
12-04 23:30:08 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@15f1ace -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:08 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@4173b9 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:08 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@760838 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:38 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@11d3ec8 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:38 WARN  [JDBCExceptionReporter] SQL Error: 0, SQLState: null
12-04 23:30:38 ERROR [JDBCExceptionReporter] Connections could not be acquired from the underlying database!
12-04 23:30:38 WARN  [RequestProcessor] Unhandled Exception thrown: class org.hibernate.exception.GenericJDBCException
12-04 23:30:38 ERROR [[travis]] "Servlet.service()" pour la servlet travis a lancé une exception
org.hibernate.exception.GenericJDBCException: Cannot open connection
   at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
   at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
   at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
   at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1538)
   at org.hibernate.loader.Loader.doQuery(Loader.java:661)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
   at org.hibernate.loader.Loader.doList(Loader.java:2211)
   at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
   at org.hibernate.loader.Loader.list(Loader.java:2090)
   at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
   at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
   at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:298)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:98)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:273)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:260)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:82)
   at asp.consignes.InitActionConsignesFormulaire.execute(InitActionConsignesFormulaire.java:47)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
   at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
   at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
   at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
   at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:236)
   at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
   at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
   ... 50 more
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
   at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:970)
   at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
   ... 53 more
12-04 23:30:38 ERROR [[travis]] "Servlet.service()" pour la servlet travis a généré une exception
org.hibernate.exception.GenericJDBCException: Cannot open connection
   at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
   at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
   at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
   at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1538)
   at org.hibernate.loader.Loader.doQuery(Loader.java:661)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
   at org.hibernate.loader.Loader.doList(Loader.java:2211)
   at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
   at org.hibernate.loader.Loader.list(Loader.java:2090)
   at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
   at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
   at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:298)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:98)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:273)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:260)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:82)
   at asp.consignes.InitActionConsignesFormulaire.execute(InitActionConsignesFormulaire.java:47)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
   at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
   at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
   at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
   at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:236)
   at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
   at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
   ... 50 more
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
   at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:970)
   at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
   ... 53 more


I don't know exactly if it comes from Hiberntate or from MySQL, so if you want my MySQL config, just ask ! But I guess it all comes from my c3p0 (bad) configuration.

Regards,


Alien
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