If I remember correctly, MySQL basically disconnects and shutdowns after a certain amount of time. I remember doing something with a "reload="true" in the datasource to prevent this.
Hopefully someone else may clue you in better, but you may want to check the datasource props and see if this is valid. Scott -----Original Message----- From: Chris Long [mailto:[EMAIL PROTECTED] Sent: Monday, January 29, 2007 8:54 AM To: users@tomcat.apache.org Subject: Tomcat and MySQL sync problems Hello, I'm having a problem where it seems Tomcat and MySQL go out of sync and I am no longer able to connect to the MySQL database. The only way I've found to be able to reconnect to my database is to restart Tomcat. This generally seems to happen some time over the course of the night and I notice the problem when I check on things in the morning, but it doesn't seem to happen every time. Does anyone have any idea what may be causing this and how to fix it? Here is a list of what I'm using: Tomcat 5.5.17 MySQL 14.12 Hibernate 3.2 mysql-connector-java-5.0.4 JAVA 1.5 Windows XP Pro [Jan 29 2007 (Mon)9:30:56 EST] ERROR [http-8888-Processor20]( org.hibernate.util.JDBCExceptionReporter) - No operations allowed after connection closed.Connection was implicitly closed due to underlying exception/error: ** BEGIN NESTED EXCEPTION ** com.mysql.jdbc.CommunicationsException MESSAGE: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.SocketException MESSAGE: Software caused connection abort: socket write error STACKTRACE: java.net.SocketException: Software caused connection abort: socket write error at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java :65) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123) at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2637) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1554) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665) at com.mysql.jdbc.Connection.execSQL(Connection.java:3176) at com.mysql.jdbc.PreparedStatement.executeInternal( PreparedStatement.java:1153) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java :1266) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java :186) at org.hibernate.loader.Loader.getResultSet(Loader.java:1778) at org.hibernate.loader.Loader.doQuery(Loader.java:662) 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.hql.QueryLoader.list(QueryLoader.java:388) at org.hibernate.hql.ast.QueryTranslatorImpl.list( QueryTranslatorImpl.java:338) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java :172) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) at org.hibernate.impl.AbstractQueryImpl.uniqueResult( AbstractQueryImpl.java:804) at com.tne.nres.projectTracker.ProjectTrackerServlet.validateUser(Unknown Source) at com.tne.nres.projectTracker.ProjectTrackerServlet.doPost(Unknown Source) 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$Http11ConnectionHandler.proc essConnection (Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket( PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt( LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run( ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) ** END NESTED EXCEPTION ** Last packet sent to the server was 16 ms ago. STACKTRACE: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.SocketException MESSAGE: Software caused connection abort: socket write error STACKTRACE: java.net.SocketException: Software caused connection abort: socket write error at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java :65) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123) at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2637) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1554) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665) at com.mysql.jdbc.Connection.execSQL(Connection.java:3176) at com.mysql.jdbc.PreparedStatement.executeInternal( PreparedStatement.java:1153) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java :1266) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java :186) at org.hibernate.loader.Loader.getResultSet(Loader.java:1778) at org.hibernate.loader.Loader.doQuery(Loader.java:662) 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.hql.QueryLoader.list(QueryLoader.java:388) at org.hibernate.hql.ast.QueryTranslatorImpl.list( QueryTranslatorImpl.java:338) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java :172) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) at org.hibernate.impl.AbstractQueryImpl.uniqueResult( AbstractQueryImpl.java:804) at com.tne.nres.projectTracker.ProjectTrackerServlet.validateUser(Unknown Source) at com.tne.nres.projectTracker.ProjectTrackerServlet.doPost(Unknown Source) 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$Http11ConnectionHandler.proc essConnection (Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket( PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt( LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run( ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) ** END NESTED EXCEPTION ** Last packet sent to the server was 16 ms ago. at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2652) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1554) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665) at com.mysql.jdbc.Connection.execSQL(Connection.java:3176) at com.mysql.jdbc.PreparedStatement.executeInternal( PreparedStatement.java:1153) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java :1266) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java :186) at org.hibernate.loader.Loader.getResultSet(Loader.java:1778) at org.hibernate.loader.Loader.doQuery(Loader.java:662) 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.hql.QueryLoader.list(QueryLoader.java:388) at org.hibernate.hql.ast.QueryTranslatorImpl.list( QueryTranslatorImpl.java:338) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java :172) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) at org.hibernate.impl.AbstractQueryImpl.uniqueResult( AbstractQueryImpl.java:804) at com.tne.nres.projectTracker.ProjectTrackerServlet.validateUser(Unknown Source) at com.tne.nres.projectTracker.ProjectTrackerServlet.doPost(Unknown Source) 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$Http11ConnectionHandler.proc essConnection (Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket( PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt( LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run( ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) ** END NESTED EXCEPTION ** Thanks, Christopher Long --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
