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I am getting this error suddenly.Till now the application was working fine from sterday i am getting this error java.sql.SQLException: Closed Connection

gocoool
gocoool asked
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Last Modified: 2008-02-01
Hi ,

  I was testing my application in the cluster environment and it was working fine for 1 hr and suddenly i got the following error please help me out

2006-10-30 20:25:51,927 ERROR [com.carrier.arm.common.utils.JDBCUtil] Closed Connection
com.carrier.arm.common.exceptions.ARMException: java.sql.SQLException: Closed Connection
      at com.carrier.arm.common.utils.JDBCUtil.getPreparedStatement(JDBCUtil.java:560)
      at com.carrier.arm.common.utils.JDBCUtil.executeQuery(JDBCUtil.java:695)
      at com.carrier.arm.common.utils.JDBCUtil.executeQuery(JDBCUtil.java:668)
      at com.carrier.arm.integration.dataaccess.common.MasterDAO.getUserContext(MasterDAO.java:100)
      at com.carrier.arm.business.common.ejb.MasterSBean.getUserContext(MasterSBean.java:88)
      at com.carrier.arm.business.common.ejb.MasterSBean_k8fmao_EOImpl.getUserContext(MasterSBean_k8fmao_EOImpl.java:260)
      at com.carrier.arm.business.sessionfacade.MasterSFacade.getUserContext(MasterSFacade.java:390)
      at com.carrier.arm.business.sessionfacade.MasterSFacade_xj4o2o_EOImpl.getUserContext(MasterSFacade_xj4o2o_EOImpl.java:424)
      at com.carrier.arm.client.bd.MasterBD.getUserContext(MasterBD.java:315)
      at com.carrier.arm.client.web.actions.LoginAction.armexecute(LoginAction.java:405)
      at com.carrier.arm.client.web.actions.ARMBaseAction.execute(ARMBaseAction.java:100)
      at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
      at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
      at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
      at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1072)
      at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
      at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
      at com.carrier.arm.client.web.actions.common.filterAction.doFilter(filterAction.java:63)
      at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
      at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6987)
      at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
      at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
      at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3892)
      at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2766)
      at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
      at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)
Caused by: java.sql.SQLException: Closed Connection
      at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
      at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:162)
      at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:227)
      at oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnection.java:735)
      at oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnection.java:652)
      at weblogic.jdbc.common.internal.ConnectionEnv.makeStatement(ConnectionEnv.java:1206)
      at weblogic.jdbc.common.internal.ConnectionEnv.getCachedStatement(ConnectionEnv.java:994)
      at weblogic.jdbc.common.internal.ConnectionEnv.getCachedStatement(ConnectionEnv.java:933)
      at weblogic.jdbc.wrapper.Connection.prepareStatement(Connection.java:359)
      at com.carrier.arm.common.utils.JDBCUtil.getPreparedStatement(JDBCUtil.java:553)
      ... 29 more


Thanks
Comment
Watch Question

Is your server still up and running?
Then is the server process on the server still running?

If possible you might reboot the server machine.

..... unless it's just a loose cable ......

;JOOP!

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Weiping DuSenior Web Developer
CERTIFIED EXPERT

Commented:
- Check your database server to see if any problems happened

- Exception thrown from JDBCUtil.java Line 560; There is a line code, something like  conn.prepareStatement()
The DB connection also could be closed by code in some line. So, you can add a couple of line code before it
if (conn == null || conn.isClosed())
    conn = JDBCUtil.getConnection....to reconnect database.
Weiping DuSenior Web Developer
CERTIFIED EXPERT
Commented:
Also, DB connection could be dropped by timeout

Author

Commented:
Thanks a lot guys...

  I restarted the server and it is working fine till now.. I also think tht it may be dropped out by the timeout....But when i restarted the server it worked fine...


Thanks

:)
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