Alfresco Tomcat Crashes

[waq]

Hi All,
Our Alfresco Server frequently crashes but we have not found the exact reason of it. Let me explain the little bit about environment, We are using  GoodSync(Sync software) to synchronize the document vi Alfresco Webdav Protocol. everytime server crashes we have to remove the PID file and start it again. error log

18:56:56,294 ERROR [org.alfresco.webdav.protocol] Internal Server Error:
org.alfresco.error.AlfrescoRuntimeException: 00285261 Exception in Transaction.
        at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:466)
        at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:272)
        at org.alfresco.repo.webdav.WebDAVMethod.execute(WebDAVMethod.java:310)
        at org.alfresco.repo.webdav.WebDAVServlet.service(WebDAVServlet.java:131)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.alfresco.repo.webdav.auth.AuthenticationFilter.doFilter(AuthenticationFilter.java:172)
        at sun.reflect.GeneratedMethodAccessor683.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.alfresco.repo.management.subsystems.ChainingSubsystemProxyFactory$1.invoke(ChainingSubsystemProxyFactory.java:116)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
        at $Proxy197.doFilter(Unknown Source)
        at org.alfresco.repo.web.filter.beans.BeanProxyFilter.doFilter(BeanProxyFilter.java:82)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.alfresco.web.app.servlet.GlobalLocalizationFilter.doFilter(GlobalLocalizationFilter.java:58)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:129)
        at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:751)
        at org.apache.coyote.http11.InternalInputBuffer$InputStreamInputBuffer.doRead(InternalInputBuffer.java:781)
        at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java:116)
        at org.apache.coyote.http11.InternalInputBuffer.doRead(InternalInputBuffer.java:710)
        at org.apache.coyote.Request.doRead(Request.java:428)
        at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:304)
        at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:405)

[mrogers]

What do you mean that your tomcat server "crashes".    The timeout error you posted above is unlikely to be related to a "crash".

[waq]

We uses webdav with Goodsync to synchronizes the document from local machine to alfresco server but most of the time we receives above messages in log. Alfresco server gets down if we start it again with alfresco.sh script then message appears PID file found but no matching process was found .In order to run again alfresco we deletes the catlina.pid file.  

What would be the cause of it? Do you think it is issue of Webdav

Thanks,
Waq