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POWhy do I get "Persistence Manager has been closed" exception
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  1. POWhy do I get "Persistence Manager has been closed" exception
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    copied!<p>My application various pieces occasionaly throw following exception</p> <pre><code>Javax.jdo.JDOFatalUserException: Persistence Manager has been closed at org.datanucleus.jdo.JDOPersistenceManager.assertIsOpen(JDOPersistenceManager.java:2125) at org.datanucleus.jdo.JDOPersistenceManager.newQuery(JDOPersistenceManager.java:1247) at org.datanucleus.jdo.JDOPersistenceManager.newQuery(JDOPersistenceManager.java:1198) at org.datanucleus.jdo.JDOPersistenceManager.newQuery(JDOPersistenceManager.java:1352) at vik.sakshum.sakshumweb.server.LoginModuleServiceImpl.recoverPassword(LoginModuleServiceImpl.java:377) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_$1.run(Method_.java:165) at java.security.AccessController.doPrivileged(Native Method) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.privilegedInvoke(Method_.java:163) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.invoke_(Method_.java:124) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.invoke(Method_.java:43) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:561) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:102) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146) at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:447) at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461) at com.google.tracing.TraceContext.runInContext(TraceContext.java:703) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458) at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) at java.lang.Thread.run(Thread.java:679) </code></pre> <p>The one of such piece of code is here </p> <pre><code>public class AdminDashBoardServiceImpl extends RemoteServiceServlet implements AdminDashBoardService{ private static final Logger log = Logger.getLogger(AdminDashBoardServiceImpl.class.getName()); private PersistenceManager pm; private static final long serialVersionUID = 1L; @Override public List&lt;NotificationBean&gt; pullNotifications() throws Exception { log.info("start of pullNotifications"); Long userId = getUserId(); try{ pm = PMF.get().getPersistenceManager(); log.info("Logged in user is:" + userId); Query query = pm.newQuery(NotificationRecepient.class, "userId == :userId"); @SuppressWarnings("unchecked") List&lt;NotificationRecepient&gt; notifyList = (List&lt;NotificationRecepient&gt;)query.execute(userId); if(notifyList.size() == 0) return null; //find associated notifications List&lt;NotificationBean&gt; nList = new ArrayList&lt;NotificationBean&gt;(); for(NotificationRecepient notify: notifyList){ Notification nData = pm.getObjectById(Notification.class, notify.getNotificationSeq()); NotificationBean bean = new NotificationBean(nData.getNotificationSeq(), nData.getTitle(), nData.getDetail(), nData.getCreationDate(), nData.isClosable()); //#41769745 add notification in the right order boolean inserted = false; for(int i=0; i &lt; nList.size(); i++){ if(bean.getCreationDate() != null &amp;&amp; nList.get(i).getCreationDate() != null ) if(bean.getCreationDate().before(nList.get(i).getCreationDate())){ nList.add(bean); inserted = true; break; } } if(inserted == false) nList.add(bean); } return nList; }catch(Exception e) { CommonServiceCode csc = new CommonServiceCode(); csc.postToPivotalTracker("Error while pulling notifications", "User Data: userId:" + userId, e); log.severe("Exception in execute of pullNotifications"); log.severe("Exception class is :" + e.getClass().getName()); log.severe("Exception is :" + e.getMessage()); e.printStackTrace(); throw new Exception(e.getMessage() + "\nError while pulling notifications"); } finally { try { if(pm != null &amp;&amp; pm.isClosed() == false) pm.close(); } catch (Exception e) { log.severe("Exception in finally of execute of pullNotifications"); log.severe("Exception class is :" + e.getClass().getName()); log.severe("Exception is :" + e.getMessage()); throw new Exception(e.getMessage() + "Unable to close persistence manager"); } log.info("end of pullNotifications"); } } </code></pre> <p>}</p>
 

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