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  1.  Home
  2. JAVA400-L
  3. January 2003

RE: con

Patrick,

found this on e-promag.com:

WS App Throwing a StaleConnectionException 
Q: My WebSphere application is throwing a 
com.ibm.websphere.ce.cm.StaleConnectionException. What is the problem?

This exception indicates that the connection is no longer valid. Here are some 
possible causes of it:

1)The database management system is down. 
2)The application previously closed the connection. 
3)The connection has been orphaned, which means that the application has held 
the connection for too long without using it. The Data Source property "Orphan 
timeout" specifies the maximum number of seconds that an application can hold a 
connection without using it. If an app holds a connection without using it 
beyond the Orphan timeout value, WebSphere may return the connection to the 
connection pool. If the connection is returned to the connection pool, and the 
application then tries to use the connection, the Stale ConnectionException is 
thrown. 

hope this helps...

met vriendelijke groeten,
salutations sincères,
kind regards,

Geert Van Landeghem
Reynders Etiketten NV
tel: +32 3 460.32.81
gsm: +32 477.75.95.33
<mailto:gvl@reynders.com>



-----Original Message-----
From: P.Goovaerts@Clipper.Be [mailto:P.Goovaerts@Clipper.Be]
Sent: donderdag 16 januari 2003 9:34
To: java400-l@midrange.com
Cc: web400@midrange.com
Subject: con


We have running a webapp which uses 'connection-pooling' to get data from 
the iSeries.  From time to time, a selectionbox in a JSP, filled with a 
datatable is empty.  The only lead we have is an error in the std_out.log 
from WAS4.0.4

This is what we do in short:
Application loaded (basic authentication)
   JSP is loaded
   JSP initializes a databean 
   JSP executes a method from the bean
      BEAN gets a connection, using connection-pooling
      BEAN loads a table into a vector
   JSP reads vector into selection-list-box
   JSP is displayed in browser
mostly this works ok but from time to time, the selectionbox is empty...

Any suggestions???

We use WAS V4
We created the application with WSAD V4.  While testing inside WSAD we 
didn't encounter any errors.  Then I deployed the application into WAS V4 
on Win2000.  Again no errors encountered.  Finally we deployed to WAS V4 
on iSeries 270.  At first it worked but then we noticed the problem. 

This is the error displayed in log:

[16/01/03 7:54:17:516 UTC] 241eff08 StaleConnecti A CONM7007I: Mapping the 
following SQLException, with ErrorCode -99.999 and SQLState 08003, to a 
StaleConnectionException: java.sql.SQLException: The connection does not 
exist.(Connection was dropped unexpectedly.)
      java/lang/Throwable.<init>(Ljava/lang/String;)V+4 
(Throwable.java:90) 
      java/lang/Exception.<init>(Ljava/lang/String;)V+1 
(Exception.java:38) 
 java/sql/SQLException.<init>(Ljava/lang/String;Ljava/lang/String;I)V+1 
(SQLException.java:39) 
 
com/ibm/as400/access/JDError.throwSQLException(Ljava/lang/String;Ljava/lang/Exception;)V+0
 
(JDError.java:317) 
 
com/ibm/as400/access/AS400JDBCConnection.sendAndReceive(Lcom/ibm/as400/access/DBBaseRequestDS;I)Lcom/ibm/as400/access/DBReplyRequestedDS;+0
 
(AS400JDBCConnection.java:1846) 
 
com/ibm/as400/access/AS400JDBCStatement.commonExecute(Lcom/ibm/as400/access/JDSQLStatement;Lcom/ibm/as400/access/JDServerRow;)V+0
 
(AS400JDBCStatement.java:467) 
 
com/ibm/as400/access/AS400JDBCPreparedStatement.executeQuery()Ljava/sql/ResultSet;+0
 
(AS400JDBCPreparedStatement.java:827) 
 
com/ibm/ejs/cm/cache/CachedStatement.executeQuery()Ljava/sql/ResultSet;+118 
(CachedStatement.java:301) 
 
com/ibm/ejs/cm/proxy/StatementProxy.executeQueryCommon(Ljava/lang/String;Z)Ljava/sql/ResultSet;+96
 
(StatementProxy.java:274) 
 
com/ibm/ejs/cm/proxy/PreparedStatementProxy.executeQuery()Ljava/sql/ResultSet;+1
 
(PreparedStatementProxy.java:47) 
 
com/clipper/objects/Cigars.getAllCigarTypesPerClient(Ljava/sql/Connection;Ljava/lang/String;)Ljava/util/Vector;+0
 
(Cigars.java:284) 
      com/clipper/beans/CigarsBean.getCigarTypes(Ljava/lang/String;)V+0 
(CigarsBean.java:40) 
 
_CigarStock_jsp_0._jspService(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+0
 
(_CigarStock_jsp_0.java:53) 
 
javax/servlet/http/HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+26
 
(HttpServlet.java:853) 
 
org/apache/jasper/runtime/JspServlet$JspServletWrapper.service(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;Z)V+159
 
(JspServlet.java:312) 
 
org/apache/jasper/runtime/JspServlet.serviceJspFile(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;Ljava/lang/String;Ljava/lang/Throwable;ZLjava/lang/String;)V+92
 
(JspServlet.java:500) 
 
org/apache/jasper/runtime/JspServlet.service(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+154
 
(JspServlet.java:633) 
 
javax/servlet/http/HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+26
 
(HttpServlet.java:853) 
 
com/ibm/servlet/engine/webapp/StrictServletInstance.doService(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+21
 
(ServletManager.java:827) 
 
com/ibm/servlet/engine/webapp/StrictLifecycleServlet._service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+69
 
(StrictLifecycleServlet.java:167) 
 
com/ibm/servlet/engine/webapp/ServletInstance.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Lcom/ibm/servlet/engine/webapp/WebAppServletInvocationEvent;)V+186
 
(ServletManager.java:472) 
 
com/ibm/servlet/engine/webapp/WebAppRequestDispatcher.handleWebAppDispatch(Lcom/ibm/servlet/engine/webapp/WebAppRequest;Ljavax/servlet/http/HttpServletResponse;)V+817
 
(WebAppRequestDispatcher.java:678) 
 
com/ibm/servlet/engine/webapp/WebAppRequestDispatcher.dispatch(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Z)V+1080
 
(WebAppRequestDispatcher.java:331) 
 
com/ibm/servlet/engine/webapp/WebAppRequestDispatcher.forward(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+85
 
(WebAppRequestDispatcher.java:117) 
 
com/clipper/expedancigarstock/SLoginUser.doGet(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+0
 
(SLoginUser.java:53) 
 
com/clipper/expedancigarstock/SLoginUser.doPost(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+0
 
(SLoginUser.java:426) 
 
javax/servlet/http/HttpServlet.service(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+136
 
(HttpServlet.java:760) 
 
javax/servlet/http/HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+26
 
(HttpServlet.java:853) 
 
com/ibm/servlet/engine/webapp/StrictServletInstance.doService(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+21
 
(ServletManager.java:827) 
 
com/ibm/servlet/engine/webapp/StrictLifecycleServlet._service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+69
 
(StrictLifecycleServlet.java:167) 
 
com/ibm/servlet/engine/webapp/ServletInstance.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Lcom/ibm/servlet/engine/webapp/WebAppServletInvocationEvent;)V+186
 
(ServletManager.java:472) 
 
com/ibm/servlet/engine/webapp/WebAppRequestDispatcher.handleWebAppDispatch(Lcom/ibm/servlet/engine/webapp/WebAppRequest;Ljavax/servlet/http/HttpServletResponse;)V+817
 
(WebAppRequestDispatcher.java:678) 
 
com/ibm/servlet/engine/webapp/WebAppRequestDispatcher.dispatch(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Z)V+1080
 
(WebAppRequestDispatcher.java:331) 
 
com/ibm/servlet/engine/webapp/WebAppRequestDispatcher.forward(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+85
 
(WebAppRequestDispatcher.java:117) 
 
com/ibm/servlet/engine/srt/WebAppInvoker.doForward(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+234
 
(WebAppInvoker.java:134) 
 
com/ibm/servlet/engine/srt/WebAppInvoker.handleInvocationHook(Ljava/lang/Object;)V+175
 
(WebAppInvoker.java:239) 
 
com/ibm/servlet/engine/invocation/CachedInvocation.handleInvocation(Ljava/lang/Object;)V+25
 
(CachedInvocation.java:67) 
 
com/ibm/servlet/engine/invocation/CacheableInvocationContext.invoke(Ljava/lang/Object;)V+87
 
(CacheableInvocationContext.java:106) 
 
com/ibm/servlet/engine/srp/ServletRequestProcessor.dispatchByURI(Ljava/lang/String;Lcom/ibm/servlet/engine/srp/ISRPConnection;)V+737
 
(ServletRequestProcessor.java:154) 
 
com/ibm/servlet/engine/oselistener/OSEListenerDispatcher.service(Lcom/ibm/servlet/engine/oselistener/api/IOSEConnection;)V+104
 
(OSEListener.java:315) 
      com/ibm/servlet/engine/http11/HttpConnection.handleRequest()V+4 
(HttpConnection.java:60) 
      com/ibm/ws/http/HttpConnection.readAndHandleRequest()V+50 
(HttpConnection.java:323) 
      com/ibm/ws/http/HttpConnection.run()V+195 (HttpConnection.java:252) 
      com/ibm/ws/util/CachedThread.run()V+18 (ThreadPool.java:137)

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