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Issue #525 has been updated by Pablo Ojanguren.
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<p>So problem comes from a SELECT <acronym title="*">COUNT</acronym>... (SiteMapGenerator.countNotClosedGroups(SiteMapGenerator.java:160))<br />We could start thinking on hibernate-pool configuration problem.</p>
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<h1><a href="http://redmine.ourproject.org/issues/525#change-785">Defect #525: SiteMap generation is not working properly in large sites</a></h1>
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<li>Author: Vicente J. Ruiz Jurado</li>
<li>Status: New</li>
<li>Priority: High</li>
<li>Assignee: </li>
<li>Category: </li>
<li>Target version: </li>
<li>Resolution: </li>
<li>Tags: </li>
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<p>The current exception</p>
<p>2013-03-22 00:20:00 GenerateSitemapJob [INFO] Daily sitemap generation cron job start<br />2013-03-22 00:20:00 LoggerMethodInterceptor [DEBUG] SiteMapGenerator.generate()<br />2013-03-22 00:20:00 NewPooledConnection [WARN] [c3p0] A PooledConnection that has already signalled a Connection error is still in use!<br />2013-03-22 00:20:00 NewPooledConnection [WARN] [c3p0] Another error has occurred [ com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed. ] which will not be reported to listeners!<br />com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.<br /> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)<br /> at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)<br /> at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)<br /> at java.lang.reflect.Constructor.newInstance(Constructor.java:532)<br /> at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)<br /> at com.mysql.jdbc.Util.getInstance(Util.java:384)<br /> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)<br /> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)<br /> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)<br /> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:929)<br /> at com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1193)<br /> at com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1180)<br /> at com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:4137)<br /> at com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:4103)<br /> at com.mchange.v2.c3p0.impl.NewProxyConnection.prepareStatement(NewProxyConnection.java:213)<br /> at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)<br /> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)<br /> at java.lang.reflect.Method.invoke(Method.java:616)<br /> at org.hibernate.engine.jdbc.internal.proxy.ConnectionProxyHandler.continueInvocation(ConnectionProxyHandler.java:138)<br /> at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81)<br /> at $Proxy100.prepareStatement(Unknown Source)<br /> at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:147)<br /> at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:166)<br /> at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:145)<br /> at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1720)<br /> at org.hibernate.loader.Loader.doQuery(Loader.java:828)<br /> at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:289)<br /> at org.hibernate.loader.Loader.doList(Loader.java:2447)<br /> at org.hibernate.loader.Loader.doList(Loader.java:2433)<br /> at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2263)<br /> at org.hibernate.loader.Loader.list(Loader.java:2258)<br /> at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470)<br /> at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355)<br /> at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)<br /> at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1215)<br /> at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)<br /> at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:284)<br /> at com.google.inject.persist.jpa.JpaFinderProxy.invoke(JpaFinderProxy.java:72)<br /> at com.google.inject.persist.jpa.JpaPersistModule$1.invoke(JpaPersistModule.java:129)<br /> at $Proxy23.countExceptType(Unknown Source)<br /> at cc.kune.core.server.searcheable.SiteMapGenerator.countNotClosedGroups(SiteMapGenerator.java:160)<br /> at cc.kune.core.server.searcheable.SiteMapGenerator.generate(SiteMapGenerator.java:115)<br /> at cc.kune.core.server.searcheable.SiteMapGenerator$$EnhancerByGuice$$26e8b0a.CGLIB$generate$0(<generated>)<br /> at cc.kune.core.server.searcheable.SiteMapGenerator$$EnhancerByGuice$$26e8b0a$$FastClassByGuice$$a56540aa.invoke(<generated>)</p>
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