Alfresco crashes randomly

[enigma969]

I have a web application that uses Alfresco 5.0a to store documents. The backend of the application is Java based and I use CMIS to communicate with Alfresco. Since some days, Alfresco crashes randomly and I have no idea what causes that. There were no modifications made regarding the communication with Alfresco. My VPS also crashed completely sometimes and I think the Alfresco crash was the reason. 

Here is the main exception that is written to alfresco.log 

07:31:49,383 ERROR [org.apache.chemistry.opencmis.server.impl.atompub.CmisAtomPubServlet] [http-apr-8080-exec-6]
org.apache.chemistry.opencmis.commons.exceptions.CmisRuntimeException
at org.apache.chemistry.opencmis.server.shared.Dispatcher.dispatch(Dispatcher.java:92)
at org.apache.chemistry.opencmis.server.impl.atompub.CmisAtomPubServlet.dispatch(CmisAtomPubServlet.java:225)
at org.apache.chemistry.opencmis.server.impl.atompub.CmisAtomPubServlet.service(CmisAtomPubServlet.java:172)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.repo.webdav.auth.AuthenticationFilter.doFilter(AuthenticationFilter.java:252)
at sun.reflect.GeneratedMethodAccessor401.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.alfresco.repo.management.subsystems.ChainingSubsystemProxyFactory$1.invoke(ChainingSubsystemProxyFactory.java:125)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at com.sun.proxy.$Proxy294.doFilter(Unknown Source)
at org.alfresco.repo.web.filter.beans.BeanProxyFilter.doFilter(BeanProxyFilter.java:82)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.web.app.servlet.CmisSecurityContextCleanerFilter.doFilter(CmisSecurityContextCleanerFilter.java:49)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.web.app.servlet.GlobalLocalizationFilter.doFilter(GlobalLocalizationFilter.java:61)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2378)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: ClientAbortException: java.io.IOException
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:413)
at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:371)
at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:438)
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:426)
at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:91)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
at org.apache.chemistry.opencmis.server.impl.atompub.ObjectService$GetContentStream.serve(ObjectService.java:486)
at org.apache.chemistry.opencmis.server.shared.Dispatcher.dispatch(Dispatcher.java:88)
... 39 more

Thanks in advance

[afaust]

The error you provided is a "trivial" one - it is basically just an information that an operation could not complete because the client has stopped listening for a response (unexpectedly).

Alfresco 5.0.a was quite an early-access release in the 5.0 release train. If you suffer from random crashes / other issues it might be good to at least update to the most recent release for that codeline (5.0.d) or any of the more recent codelines (5.1 / 5.2).