[daisy] Premature logout

[Sanjeevkoul]

On our Daisy installation, users are experiencing premature timeouts.
 Example:
 - User is logged in
 - User chooses Actions | Edit to edit a page
 - Spends a few minutes editing the page
 - Presses Save
 - The page is saved, but the menu bar displays: "User: Guest" The user  has
been logged out.

Another scenario:
 - User is oogged in
 - User navigates to a page
 - User chooses Action | Edit
 - Error message is displayed, and user is no longer logged in

This all seems to be happening at random. Does anybody have  suggestions how
to investigate the cause?

So findings

Write access denied for user 101 to document 925-DSY, branch main (ID 1),
language default (ID 1)

Cocoon Stack Trace
Message: Sitemap: error calling function
'org.outerj.daisy.frontend.editor.DocumentEditorApple'
context:/daisy/sitemap.xmap - 873:84	<map:call>

Java Stack Trace
Message: Sitemap: error calling function
'org.outerj.daisy.frontend.editor.DocumentEditorApple'
Class: org.apache.cocoon.ProcessingException
Stacktrace:
org.apache.cocoon.ProcessingException.throwLocated
(ProcessingException.java:113)
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke
(CallFunctionNode.java:141)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:47)
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:131)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:47)
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke
(MatchNode.java:108)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:143)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:93)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:235)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:177)
org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:253)
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:118)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:143)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:93)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:235)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:177)
org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:253)
org.apache.cocoon.Cocoon.process (Cocoon.java:699)
org.apache.cocoon.servlet.CocoonServlet.service (CocoonServlet.java:1154)
javax.servlet.http.HttpServlet.service (HttpServlet.java:820)
org.mortbay.jetty.servlet.ServletHolder.handle (ServletHolder.java:487)
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1098)
org.outerj.daisy.frontend.util.CharacterEncodingFilter.doFilter
(CharacterEncodingFilter.java:35)
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1089)
org.mortbay.jetty.servlet.ServletHandler.handle (ServletHandler.java:365)
org.mortbay.jetty.security.SecurityHandler.handle (SecurityHandler.java:216)
org.mortbay.jetty.servlet.SessionHandler.handle (SessionHandler.java:181)
org.mortbay.jetty.handler.ContextHandler.handle (ContextHandler.java:712)
org.mortbay.jetty.webapp.WebAppContext.handle (WebAppContext.java:405)
org.mortbay.jetty.handler.HandlerCollection.handle
(HandlerCollection.java:114)
org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139)
org.mortbay.jetty.Server.handle (Server.java:285)
org.mortbay.jetty.HttpConnection.handleRequest (HttpConnection.java:502)
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete
(HttpConnection.java:821)
org.mortbay.jetty.HttpParser.parseNext (HttpParser.java:513)
org.mortbay.jetty.HttpParser.parseAvailable (HttpParser.java:202)
org.mortbay.jetty.HttpConnection.handle (HttpConnection.java:378)
org.mortbay.io.nio.SelectChannelEndPoint.run
(SelectChannelEndPoint.java:368)
org.mortbay.thread.BoundedThreadPool$PoolThread.run
(BoundedThreadPool.java:442)
Message: Write access denied for user 101 to document 925-DSY, branch main
(ID 1), language default (ID 1)
Class: org.outerj.daisy.repository.AccessException
Stacktrace:
sun.reflect.NativeConstructorAccessorImpl.newInstance0 [native method]
(NativeConstructorAccessorImpl.java:-2)
sun.reflect.NativeConstructorAccessorImpl.newInstance
(NativeConstructorAccessorImpl.java:39)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance
(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance (Constructor.java:513)
org.outerj.daisy.repository.clientimpl.infrastructure.DaisyHttpClient.tryRestoreOriginalException
(DaisyHttpClient.java:259)
org.outerj.daisy.repository.clientimpl.infrastructure.DaisyHttpClient.tryRestoreOriginalExceptionAndThrowIt
(DaisyHttpClient.java:222)
org.outerj.daisy.repository.clientimpl.infrastructure.DaisyHttpClient.handleNotOkResponse
(DaisyHttpClient.java:177)
org.outerj.daisy.repository.clientimpl.infrastructure.DaisyHttpClient.executeMethod
(DaisyHttpClient.java:111)
org.outerj.daisy.repository.clientimpl.RemoteDocumentStrategy.lock
(RemoteDocumentStrategy.java:448)
org.outerj.daisy.repository.commonimpl.DocumentVariantImpl.lock
(DocumentVariantImpl.java:373)
org.outerj.daisy.repository.commonimpl.DocumentImpl.lock
(DocumentImpl.java:246)
org.outerj.daisy.frontend.editor.DocumentEditorApple.processRequest
(DocumentEditorApple.java:167)
org.outerj.daisy.frontend.util.AbstractDaisyApple.process
(AbstractDaisyApple.java:61)
org.apache.cocoon.components.flow.apples.ApplesProcessor.processApple
(ApplesProcessor.java:139)
org.apache.cocoon.components.flow.apples.ApplesProcessor.callFunction
(ApplesProcessor.java:82)
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke
(CallFunctionNode.java:139)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:47)
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:131)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:47)
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke
(MatchNode.java:108)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:143)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:93)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:235)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:177)
org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:253)
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:118)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:143)
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes
(AbstractParentProcessingNode.java:69)
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:93)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:235)
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process
(ConcreteTreeProcessor.java:177)
org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:253)
org.apache.cocoon.Cocoon.process (Cocoon.java:699)
org.apache.cocoon.servlet.CocoonServlet.service (CocoonServlet.java:1154)
javax.servlet.http.HttpServlet.service (HttpServlet.java:820)
org.mortbay.jetty.servlet.ServletHolder.handle (ServletHolder.java:487)
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1098)
org.outerj.daisy.frontend.util.CharacterEncodingFilter.doFilter
(CharacterEncodingFilter.java:35)
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1089)
org.mortbay.jetty.servlet.ServletHandler.handle (ServletHandler.java:365)
org.mortbay.jetty.security.SecurityHandler.handle (SecurityHandler.java:216)
org.mortbay.jetty.servlet.SessionHandler.handle (SessionHandler.java:181)
org.mortbay.jetty.handler.ContextHandler.handle (ContextHandler.java:712)
org.mortbay.jetty.webapp.WebAppContext.handle (WebAppContext.java:405)
org.mortbay.jetty.handler.HandlerCollection.handle
(HandlerCollection.java:114)
org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139)
org.mortbay.jetty.Server.handle (Server.java:285)
org.mortbay.jetty.HttpConnection.handleRequest (HttpConnection.java:502)
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete
(HttpConnection.java:821)
org.mortbay.jetty.HttpParser.parseNext (HttpParser.java:513)
org.mortbay.jetty.HttpParser.parseAvailable (HttpParser.java:202)
org.mortbay.jetty.HttpConnection.handle (HttpConnection.java:378)
org.mortbay.io.nio.SelectChannelEndPoint.run
(SelectChannelEndPoint.java:368)
org.mortbay.thread.BoundedThreadPool$PoolThread.run
(BoundedThreadPool.java:442)  

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