<span style='font-family:Verdana'><span style='font-size:12px'>Hello,<br /><br />my VM statistics aren't updated anymore. The VMs are running for 3 days now, but the Engine Web tells me about 2 hours.<br /><br />The engine.log started with<br /><br />2013-08-16 16:41:50,857 WARN&nbsp; [org.ovirt.engine.core.vdsbroker.VdsManager] (DefaultQuartzScheduler_Worker-88) Failed to refresh VDS , vds = 8256f899-fd7a-411b-8f72-6d06ddb7eb0b : SERVER1, error = java.lang.NullPointerException, continuing.: java.lang.NullPointerException<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.proceedBalloonCheck(VdsUpdateRunTimeInfo.java:1362) [vdsbroker.jar:]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.refreshVmStats(VdsUpdateRunTimeInfo.java:976) [vdsbroker.jar:]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.refreshVdsRunTimeInfo(VdsUpdateRunTimeInfo.java:552) [vdsbroker.jar:]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.Refresh(VdsUpdateRunTimeInfo.java:393) [vdsbroker.jar:]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.ovirt.engine.core.vdsbroker.VdsManager.OnTimer(VdsManager.java:237) [vdsbroker.jar:]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source) [:1.7.0_25]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_25]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_25]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.ovirt.engine.core.utils.timer.JobWrapper.execute(JobWrapper.java:60) [scheduler.jar:]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [quartz.jar:]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557) [quartz.jar:]<br /><br />and now has tons of<br /><br />2013-08-19 08:53:01,386 WARN&nbsp; [org.ovirt.engine.core.vdsbroker.VdsManager] (DefaultQuartzScheduler_Worker-98) Failed to refresh VDS , vds = 8256f899-fd7a-411b-8f72-6d06ddb7eb0b : SERVER1, error = java.lang.NullPointerException, continuing.: java.lang.NullPointerException<br /><br />Restarting on ovirt-engine didn't solved the problem so far.<br /><br />Thank you for your help<br /><br />Hans-Joachim</span></span>