Removing UnknownSessionException stack traces from logs

[Tauren Mills <ta...@groovee.com>]

When a user has been inactive for a while and their session expires, and
they then click the Logout button in my app, an UnknownSessionException is
thrown. Obviously, this makes sense to do.

However, my log file also gets a full stack trace.  I'd like to see the
error show up in my logs, but don't want the full stack trace. These are
common errors and inconsequential. If I'm scanning my logs and see a stack
trace, I want it to be for a real problem. Below is an example.

Is there some way to prevent the stack trace from showing? I should probably
already know how, but I don't.

Also, is there any reasons to not do this? Would there be times that I'd
want to see those stack traces?

Thanks,
Tauren



2011-03-03 09:10:21,672 INFO  - MyRememberMeManager - RememberMe Principals
located for: 2
2011-03-03 09:10:21,684 INFO  - AuthenticatedSession       - Member logout:
2
2011-03-03 09:10:21,689 ERROR - RequestCycle               - there was an
error detaching the request from the session
com.sprtz.web.AuthenticatedSession@6016755.
java.lang.IllegalStateException:
org.apache.shiro.session.UnknownSessionException: There is no session with
id [1bd10afe-2d85-492f-b224-d1db3450549e]
 at
org.apache.shiro.web.servlet.ShiroHttpSession.getAttribute(ShiroHttpSession.java:133)
at
org.apache.wicket.protocol.http.HttpSessionStore.getAttribute(HttpSessionStore.java:69)
 at org.apache.wicket.Session.setAttribute(Session.java:1322)
at org.apache.wicket.Session.requestDetached(Session.java:1456)
 at org.apache.wicket.RequestCycle.detach(RequestCycle.java:1176)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1462)
 at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
 at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:319)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:359)
at
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:275)
 at
org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
at
org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
 at
org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:344)
at
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:272)
 at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:81)
at
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
 at
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
 at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
 at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
 at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
 at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
 at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
 at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
 at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
 at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
 at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: org.apache.shiro.session.UnknownSessionException: There is no
session with id [1bd10afe-2d85-492f-b224-d1db3450549e]
 at
org.apache.shiro.session.mgt.eis.AbstractSessionDAO.readSession(AbstractSessionDAO.java:170)
at
org.apache.shiro.session.mgt.DefaultSessionManager.retrieveSessionFromDataSource(DefaultSessionManager.java:236)
 at
org.apache.shiro.session.mgt.DefaultSessionManager.retrieveSession(DefaultSessionManager.java:222)
at
org.apache.shiro.session.mgt.AbstractValidatingSessionManager.doGetSession(AbstractValidatingSessionManager.java:118)
 at
org.apache.shiro.session.mgt.AbstractNativeSessionManager.lookupSession(AbstractNativeSessionManager.java:105)
at
org.apache.shiro.session.mgt.AbstractNativeSessionManager.lookupRequiredSession(AbstractNativeSessionManager.java:109)
 at
org.apache.shiro.session.mgt.AbstractNativeSessionManager.getAttribute(AbstractNativeSessionManager.java:206)
at
org.apache.shiro.session.mgt.DelegatingSession.getAttribute(DelegatingSession.java:141)
 at
org.apache.shiro.session.ProxiedSession.getAttribute(ProxiedSession.java:121)
at
org.apache.shiro.web.servlet.ShiroHttpSession.getAttribute(ShiroHttpSession.java:131)
 ... 38 more