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goo
 Post subject: Communication link failure
PostPosted: Tue Feb 03, 2004 8:01 am 
Newbie

Joined: Mon Oct 27, 2003 11:50 am
Posts: 2
i made a Struts/hibernate Application which uses a mySQL Database. Everthing
works fine. But after about 24 hours there occurs an exception on the
Server where the Aplication is running:

Code:
09:18:42,149 DEBUG JDBCExceptionReporter:36 - SQL Exception
java.sql.SQLException: Communication link failure: java.net.SocketException, underlying cause: Connection reset

** BEGIN NESTED EXCEPTION **

java.net.SocketException
MESSAGE: Connection reset

STACKTRACE:

java.net.SocketException: Connection reset
   at java.net.SocketInputStream.read(SocketInputStream.java:168)
   at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
   at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
   at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1449)
   at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1826)
   at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1098)
   at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1192)
   at com.mysql.jdbc.Connection.execSQL(Connection.java:2051)
   at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1496)
   at net.sf.hibernate.impl.BatcherImpl.getResultSet(BatcherImpl.java:83)
   at net.sf.hibernate.loader.Loader.getResultSet(Loader.java:794)
   at net.sf.hibernate.loader.Loader.doQuery(Loader.java:188)
   at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:132)
   at net.sf.hibernate.loader.Loader.doList(Loader.java:949)
   at net.sf.hibernate.loader.Loader.list(Loader.java:940)
   at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:833)
   at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1475)
   at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1454)
   at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1446)



Can somebody help me with this?
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michael
 Post subject:
PostPosted: Tue Feb 03, 2004 8:23 am 
Hibernate Team
Hibernate Team

Joined: Tue Sep 09, 2003 2:10 pm
Posts: 3246
Location: Passau, Germany
Use autoReconnect=true in your jdbc url or use the validate parameters of DBCP or c3po. Read your driver docs or search the forum, this has allready been discussed.
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