Hi Ted, Excavating this from the archives:
On 1 Dec 2013, at 8:28 AM, Ted Archibald <[email protected]> wrote: > I've been having a bug where an instance won't shutdown (caveat: I haven't > updated wonder in 2 years for fear of breaking stuff...) > > The stack trace points to an error in > ERXObjectStoreCoordinatorSynchronizer$ProcessChangesQueue.stop "Attempted to > stop the ProcessChangesQueue when it wasn't already running". I don't really > care about that error, I just want the instance to shut down, but this stops > the normal shutdown process. > > Any ideas? … > Caused by: java.lang.IllegalStateException: Attempted to stop the > ProcessChangesQueue when it wasn't already running > at > er.extensions.eof.ERXObjectStoreCoordinatorSynchronizer$ProcessChangesQueue.stop(ERXObjectStoreCoordinatorSynchronizer.java:618) > at > er.extensions.eof.ERXObjectStoreCoordinatorSynchronizer.stopRemoteSynchronizer(ERXObjectStoreCoordinatorSynchronizer.java:132) > 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:585) > at > com.webobjects.foundation.NSSelector._safeInvokeMethod(NSSelector.java:122) > at > com.webobjects.foundation.NSNotificationCenter$_Entry.invokeMethod(NSNotificationCenter.java:588) > at > com.webobjects.foundation.NSNotificationCenter.postNotification(NSNotificationCenter.java:532) > at > com.webobjects.foundation.NSNotificationCenter.postNotification(NSNotificationCenter.java:546) > at > er.extensions.appserver.ERXApplication.terminate(ERXApplication.java:2733) > at > com.webobjects.appserver.WOApplication._terminateFromMonitor(WOApplication.java:3607) > at > com.webobjects.appserver.WOAdminAction.instanceRequestAction(WOAdminAction.java:96) > 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:585) > at > com.webobjects.appserver.WODirectAction.performActionNamed(WODirectAction.java:144) > at > com.webobjects.appserver._private.WOActionRequestHandler._handleRequest(WOActionRequestHandler.java:259) I’ve just seen this as well, though I can’t reliably reproduce it. In any case, modulo some line number changes, this is the code: public void stop() { if (_queueThread != null && _queueThread.isAlive()) { _running = false; _queueThread.interrupt(); } else { throw new IllegalStateException("Attempted to stop the " + getClass().getSimpleName() + " when it wasn't already running"); } } Unfortunately the original author is long gone, but I’m not seeing the rationale for throwing an exception here. This is being called when ERXApplication.ApplicationWillTerminateNotification is posted. If _queueThread is null or not alive, couldn’t we just do nothing and log it? There’s nothing catching this exception, and it goes on to prevent termination, as Ted notes. Does anyone have any thoughts on this? -- Paul Hoadley http://logicsquad.net/
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