NPE when Hupa is running for long time
--------------------------------------

                 Key: HUPA-29
                 URL: https://issues.apache.org/jira/browse/HUPA-29
             Project: JAMES Hupa
          Issue Type: Bug
          Components: server
            Reporter: Norman Maurer
            Assignee: Norman Maurer


609247490 [http-8180-7] ERROR HupaLogger  - Unable to authenticate user 
[email protected]
java.lang.NullPointerException
        at com.sun.mail.imap.IMAPStore.waitIfIdle(IMAPStore.java:1643)
        at com.sun.mail.imap.IMAPStore.getStoreProtocol(IMAPStore.java:818)
        at com.sun.mail.imap.IMAPStore.isConnected(IMAPStore.java:1145)
        at 
org.apache.hupa.server.InMemoryIMAPStoreCache.get(InMemoryIMAPStoreCache.java:86)
        at 
org.apache.hupa.server.InMemoryIMAPStoreCache.get(InMemoryIMAPStoreCache.java:69)
        at 
org.apache.hupa.server.handler.LoginUserHandler.execute(LoginUserHandler.java:74)
        at 
org.apache.hupa.server.handler.LoginUserHandler.execute(LoginUserHandler.java:42)
        at 
net.customware.gwt.dispatch.server.DefaultDispatch.doExecute(DefaultDispatch.java:78)
        at 
net.customware.gwt.dispatch.server.DefaultDispatch.execute(DefaultDispatch.java:68)
        at 
net.customware.gwt.dispatch.server.service.DispatchServiceServlet.execute(DispatchServiceServlet.java:24)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at 
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
        at 
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:166)
        at 
com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at 
com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:231)
        at 
com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:142)
        at 
com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:93)
        at 
com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:63)
        at 
com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:122)
        at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:110)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)


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