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Posted to users@tomcat.apache.org by David Gagnon <dg...@siunik.com> on 2005/12/19 13:40:56 UTC
Tomcat 4.1.31, Weird problem. Once in a while an attribute in the
session is not found... look like a RACE?! Is that possible????
Hi all,
I have a really wreird problem. I have a web site and I get a
NullPointerException once in a while because the
WcPresentationConstants.CURRENT_RESOURCE is null.
UkResource resource = (UkResource)
param.request.getSession().getAttribute(WcPresentationConstants.CURRENT_RESOURCE);
But this code arrive just after the user logs in. And just after we set
the attribute. This error occurs every 3 or 4 weeks and I cannot
reproduce it (So 99% of the time everything works just fine). This code
is always run just after the user log in so there is no user interaction
involved. If the error occurs I have a bug report sent and I print the
object in the report. In the last bug the Attribute was in the REPORT
?!?! (I remeber have seen a report where the same attribute was null).
For me it`s look like a race .. but all occurs in the same thread.
Is tomcat can do copy of session object behind de scene.. (maybe becaus
of session reload ???) or is there anything in tomcat that can explain
this (If yes, how can I avoid it )? I just don`t get it I chasing this
bug for months now ...
Thanks for your help
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Re: Tomcat 4.1.31, Weird problem. Once in a while an attribute in the
session is not found... look like a RACE?! Is that possible????
Posted by David Gagnon <dg...@siunik.com>.
Hi,
In catalina.out I get nothing more than the null pointer exception. I
also included the log from localhost_log.2005-12-15 where we can see the
actual request.
Thanks for you help!
Regards
/David
----------------localhost_log.2005-12-15
2005-12-15 15:19:56 StandardContext[/webCatalog]: Mapped to servlet
'action' with servlet path '/logon.do' and path info 'null' and update=true
2005-12-15 15:20:07 Authenticator[/webCatalog]: Security checking
request POST /webCatalog/publicPages/j_security_check
2005-12-15 15:20:07 Authenticator[/webCatalog]: We have cached auth type
FORM for principal GenericPrincipal[cabg]
2005-12-15 15:20:07 Authenticator[/webCatalog]: Already authenticated 'cabg'
2005-12-15 15:20:07 Authenticator[/webCatalog]: Checking constraint
'SecurityConstraint[Access-Authentication-Authorization Test Area]'
against POST /publicPages/j_security_check --> false
2005-12-15 15:20:07 Authenticator[/webCatalog]: No applicable constraint
located
2005-12-15 15:20:07 Authenticator[/webCatalog]: Not subject to any
constraint
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with
requestURI='/webCatalog/publicPages/j_security_check' and
relativeURI='/publicPages/j_security_check'
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying prefix match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying extension match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying default match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapped to servlet
'default' with servlet path '/publicPages/j_security_check' and path
info 'null' and update=true
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with
requestURI='/webCatalog/publicPages/index.jsp' and
relativeURI='/publicPages/index.jsp'
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapped to servlet
'publicPages.index_jsp' with servlet path '/publicPages/index.jsp' and
path info 'null' and update=true
2005-12-15 15:20:07 Authenticator[/webCatalog]: Security checking
request GET /webCatalog/graphics/webSite/BG_LightBeige.gif
2005-12-15 15:20:07 Authenticator[/webCatalog]: We have cached auth type
FORM for principal GenericPrincipal[cabg]
2005-12-15 15:20:07 Authenticator[/webCatalog]: Checking constraint
'SecurityConstraint[Access-Authentication-Authorization Test Area]'
against GET /graphics/webSite/BG_LightBeige.gif --> false
2005-12-15 15:20:07 Authenticator[/webCatalog]: No applicable constraint
located
2005-12-15 15:20:07 Authenticator[/webCatalog]: Not subject to any
constraint
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with
requestURI='/webCatalog/graphics/webSite/BG_LightBeige.gif' and
relativeURI='/graphics/webSite/BG_LightBeige.gif'
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying prefix match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying extension match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying default match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapped to servlet
'default' with servlet path '/graphics/webSite/BG_LightBeige.gif' and
path info 'null' and update=true
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with
requestURI='/webCatalog/publicPages/index.jsp' and
relativeURI='/publicPages/index.jsp'
2005-12-15 15:20:07 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:07 StandardContext[/webCatalog]: Mapped to servlet
'publicPages.index_jsp' with servlet path '/publicPages/index.jsp' and
path info 'null' and update=true
2005-12-15 15:20:08 Authenticator[/webCatalog]: Security checking
request POST /webCatalog/logon.do
2005-12-15 15:20:08 Authenticator[/webCatalog]: We have cached auth type
FORM for principal GenericPrincipal[cabg]
2005-12-15 15:20:08 Authenticator[/webCatalog]: Checking constraint
'SecurityConstraint[Access-Authentication-Authorization Test Area]'
against POST /logon.do --> true
2005-12-15 15:20:08 Authenticator[/webCatalog]: Subject to constraint
SecurityConstraint[Access-Authentication-Authorization Test Area]
2005-12-15 15:20:08 Authenticator[/webCatalog]: Calling checkUserData()
2005-12-15 15:20:08 Authenticator[/webCatalog]: User data constraint has
no restrictions
2005-12-15 15:20:08 Authenticator[/webCatalog]: Calling authenticate()
2005-12-15 15:20:08 Authenticator[/webCatalog]: Already authenticated 'cabg'
2005-12-15 15:20:08 Authenticator[/webCatalog]: Calling accessControl()
2005-12-15 15:20:08 JDBCRealm[/webCatalog]: Username cabg has role
applicationUser
2005-12-15 15:20:08 Authenticator[/webCatalog]: Successfully passed all
security constraints
2005-12-15 15:20:08 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with requestURI='/webCatalog/logon.do' and
relativeURI='/logon.do'
2005-12-15 15:20:08 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:08 StandardContext[/webCatalog]: Trying prefix match
2005-12-15 15:20:08 StandardContext[/webCatalog]: Trying extension match
2005-12-15 15:20:08 StandardContext[/webCatalog]: Mapped to servlet
'action' with servlet path '/logon.do' and path info 'null' and update=true
2005-12-15 15:20:08 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with requestURI='/webCatalog/orderSummary.do'
and relativeURI='/orderSummary.do'
2005-12-15 15:20:08 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:08 StandardContext[/webCatalog]: Trying prefix match
2005-12-15 15:20:08 StandardContext[/webCatalog]: Trying extension match
2005-12-15 15:20:08 StandardContext[/webCatalog]: Mapped to servlet
'action' with servlet path '/orderSummary.do' and path info 'null' and
update=true
2005-12-15 15:20:09 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with requestURI='/webCatalog/bugAgent.do' and
relativeURI='/bugAgent.do'
2005-12-15 15:20:09 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:09 StandardContext[/webCatalog]: Trying prefix match
2005-12-15 15:20:09 StandardContext[/webCatalog]: Trying extension match
2005-12-15 15:20:09 StandardContext[/webCatalog]: Mapped to servlet
'action' with servlet path '/bugAgent.do' and path info 'null' and
update=true
2005-12-15 15:20:09 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with requestURI='/webCatalog/orderSummary.do'
and relativeURI='/orderSummary.do'
2005-12-15 15:20:09 StandardContext[/webCatalog]: Trying exact match
2005-12-15 15:20:09 StandardContext[/webCatalog]: Trying prefix match
2005-12-15 15:20:09 StandardContext[/webCatalog]: Trying extension match
2005-12-15 15:20:09 StandardContext[/webCatalog]: Mapped to servlet
'action' with servlet path '/orderSummary.do' and path info 'null' and
update=true
2005-12-15 15:20:12 StandardContext[/webCatalog]: Mapping
contextPath='/webCatalog' with
requestURI='/webCatalog/WEB-INF/pages/webSiteLayout/common/wcLayout.jsp'
and relativeURI='/WEB-INF/pages/webSiteLayout/common/wcLayout.jsp'
2005-12-15 15:20:12 StandardContext[/webCatalog]: Trying exact match
------CATALINA.OUT-----
WARN [http-8080-Processor155] (ExceptionManagerImpl.java:138) 2005-12-15
15:20:08,686 : Exception not converted: null
java.lang.NullPointerException
at
com.unik.webcatalog.action.order.OrderAction.executeSpecificAction(OrderAction.java:669)
at com.davecorp.webos.action.BaseAction.execute(BaseAction.java:270)
at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at
com.davecorp.webos.struts.WindowEnabledRequestProcessor.process(WindowEnabledRequestProcessor.java:181)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:627)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:382)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:306)
at
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
at
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:274)
at
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:320)
at
com.davecorp.webos.struts.WindowEnabledRequestProcessor.process(WindowEnabledRequestProcessor.java:217)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at
com.davecorp.webos.servlet.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:141)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
ERROR [http-8080-Processor155] (BugAgentExceptionHandler.java:30)
2005-12-15 15:20:08,835 :
java.lang.NullPointerException
at
com.unik.webcatalog.action.order.OrderAction.executeSpecificAction(OrderAction.java:669)
at com.davecorp.webos.action.BaseAction.execute(BaseAction.java:270)
at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at
com.davecorp.webos.struts.WindowEnabledRequestProcessor.process(WindowEnabledRequestProcessor.java:181)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:627)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:382)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:306)
at
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
at
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:274)
at
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:320)
at
com.davecorp.webos.struts.WindowEnabledRequestProcessor.process(WindowEnabledRequestProcessor.java:217)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at
com.davecorp.webos.servlet.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:141)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
Martin Gainty wrote:
>Good Morning David-
>
>What does the log say?
>
>Martin-
>----- Original Message -----
>From: "David Gagnon" <dg...@siunik.com>
>To: "Tomcat Users List" <us...@tomcat.apache.org>
>Sent: Monday, December 19, 2005 7:40 AM
>Subject: Tomcat 4.1.31, Weird problem. Once in a while an attribute in the session is not found... look like a RACE?! Is that possible????
>
>
>
>
>>Hi all,
>>
>>I have a really wreird problem. I have a web site and I get a
>>NullPointerException once in a while because the
>>WcPresentationConstants.CURRENT_RESOURCE is null.
>>
>>UkResource resource = (UkResource)
>>param.request.getSession().getAttribute(WcPresentationConstants.CURRENT_RESOURCE);
>>
>>
>>But this code arrive just after the user logs in. And just after we set
>>the attribute. This error occurs every 3 or 4 weeks and I cannot
>>reproduce it (So 99% of the time everything works just fine). This code
>>is always run just after the user log in so there is no user interaction
>>involved. If the error occurs I have a bug report sent and I print the
>>object in the report. In the last bug the Attribute was in the REPORT
>>?!?! (I remeber have seen a report where the same attribute was null).
>>For me it`s look like a race .. but all occurs in the same thread.
>>
>>Is tomcat can do copy of session object behind de scene.. (maybe becaus
>>of session reload ???) or is there anything in tomcat that can explain
>>this (If yes, how can I avoid it )? I just don`t get it I chasing this
>>bug for months now ...
>>
>>Thanks for your help
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>>
>>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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Re: Tomcat 4.1.31, Weird problem. Once in a while an attribute in the session is not found... look like a RACE?! Is that possible????
Posted by Martin Gainty <mg...@hotmail.com>.
Good Morning David-
What does the log say?
Martin-
----- Original Message -----
From: "David Gagnon" <dg...@siunik.com>
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Monday, December 19, 2005 7:40 AM
Subject: Tomcat 4.1.31, Weird problem. Once in a while an attribute in the session is not found... look like a RACE?! Is that possible????
> Hi all,
>
> I have a really wreird problem. I have a web site and I get a
> NullPointerException once in a while because the
> WcPresentationConstants.CURRENT_RESOURCE is null.
>
> UkResource resource = (UkResource)
> param.request.getSession().getAttribute(WcPresentationConstants.CURRENT_RESOURCE);
>
>
> But this code arrive just after the user logs in. And just after we set
> the attribute. This error occurs every 3 or 4 weeks and I cannot
> reproduce it (So 99% of the time everything works just fine). This code
> is always run just after the user log in so there is no user interaction
> involved. If the error occurs I have a bug report sent and I print the
> object in the report. In the last bug the Attribute was in the REPORT
> ?!?! (I remeber have seen a report where the same attribute was null).
> For me it`s look like a race .. but all occurs in the same thread.
>
> Is tomcat can do copy of session object behind de scene.. (maybe becaus
> of session reload ???) or is there anything in tomcat that can explain
> this (If yes, how can I avoid it )? I just don`t get it I chasing this
> bug for months now ...
>
> Thanks for your help
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>