java.net.SocketException: Connection reset

Tue, 08 May 2007 08:52:51 -0700 

Hello everybody,
I'm using OJB in my web applicatin now for more than one year, and it did really fine. 


But since some time an exception occurs which I can't figure out. 
Obviously the connection to the backend was reset.
May it be the case that the db connection timed out? Anybody got an idea 
what I can do about this?


I found this issue in jira but I'm not sure if it's the same case as mine:
http://issues.apache.org/jira/browse/OJB-70?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Best regards,

Abid

Here's the stack trace:
ERROR: [org.apache.ojb.broker.accesslayer.JdbcAccessImpl]
* SQLException during execution of sql-statement:

* sql statement was 'SELECT 
A0.Id,A0.modul_Name,A0.LP,A0.Zuordnung,A0.Ziele,A0.Inhalte,A0.Literatur,A0.Voraussetzung,A0.Modulpruefung,A0.Selbststudium,A0.Form_Teilnahme,A0.Sprache,A0.Aufwand_Gesamt,A0.Dauer,A0.Haeufigkeit,A0.Sonst_Verantwortliche 
FROM Modul_2 A0 WHERE A0.Id = ?'

* Exception message is [An I/O error occured while sending to the backend.]
* Vendor error code [0]
* SQL state code [08006]
* Target class is 'modulverwaltung.beans.Module_2'
* PK of the target object is [id]
* The root stack trace is -->
* java.net.SocketException: Connection reset
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
        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 org.postgresql.core.PGStream.flush(PGStream.java:494)

	at 
org.postgresql.core.v3.QueryExecutorImpl.sendSync(QueryExecutorImpl.java:631)
	at 
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:174)
	at 
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:389)
	at 
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:330)
	at 
org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:240)
	at 
com.p6spy.engine.logging.P6LogPreparedStatement.executeQuery(P6LogPreparedStatement.java:172)
	at 
org.apache.ojb.broker.accesslayer.JdbcAccessImpl.materializeObject(Unknown 
Source)
	at 
org.apache.ojb.broker.core.PersistenceBrokerImpl.getPlainDBObject(Unknown 
Source)
	at org.apache.ojb.broker.core.PersistenceBrokerImpl.getDBObject(Unknown 
Source)
	at 
org.apache.ojb.broker.core.PersistenceBrokerImpl.doGetObjectByIdentity(Unknown 
Source)
	at 
org.apache.ojb.broker.core.PersistenceBrokerImpl.getObjectByIdentity(Unknown 
Source)
	at 
org.apache.ojb.broker.core.PersistenceBrokerImpl.getObjectByQuery(Unknown 
Source)
	at 
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unknown 
Source)
	at 
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getObjectByQuery(Unknown 
Source)
	at 
modulverwaltung.persistence.Module_2DAO.findByPrimaryKey(Module_2DAO.java:73)

        at modulverwaltung.action.ShowModule.performAction(ShowModule.java:32)
        at modulverwaltung.controller.Controller.doGet(Controller.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        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:856)
	at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
	at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at 
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)

        at java.lang.Thread.run(Thread.java:595)

--

Abid Hussain
Mail: [EMAIL PROTECTED]
Web: http://www.abid76.de

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