[Users] All VMs disappeared

Hello, Iam running ovirt 3.3.0.beta1 on centos 6,4 and all our VMs disappeared from VMs tab. Nodes running on centos too. Repeating problem in log is: 2013-08-09 09:44:24,203 WARN [org.ovirt.engine.core.vdsbroker.VdsManager] (DefaultQuartzScheduler_Worker-45) Failed to refresh VDS , vds = 7cb6aedf-47bc-40b0-877f-2a537fca5c64 : node2.x.com, error = java.lang.NullPointerException, continuing.: java.lang.NullPointerException at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.proceedGuaranteedMemoryCheck(VdsUpdateRunTimeInfo.java:1313) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.refreshVmStats(VdsUpdateRunTimeInfo.java:968) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.refreshVdsRunTimeInfo(VdsUpdateRunTimeInfo.java:542) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.Refresh(VdsUpdateRunTimeInfo.java:383) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsManager.OnTimer(VdsManager.java:237) [vdsbroker.jar:] at sun.reflect.GeneratedMethodAccessor171.invoke(Unknown Source) [:1.7.0_25] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_25] at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_25] at org.ovirt.engine.core.utils.timer.JobWrapper.execute(JobWrapper.java:60) [scheduler.jar:] at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [quartz.jar:] at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557) [quartz.jar:] 2013-08-09 09:44:27,039 WARN [org.ovirt.engine.core.vdsbroker.VdsManager] (DefaultQuartzScheduler_Worker-47) Failed to refresh VDS , vds = 653e34a6-6b7e-4757-9042-dc02e7a0cddf : node3.x.com, error = java.lang.NullPointerException, continuing.: java.lang.NullPointerException at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.proceedGuaranteedMemoryCheck(VdsUpdateRunTimeInfo.java:1313) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.refreshVmStats(VdsUpdateRunTimeInfo.java:968) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.refreshVdsRunTimeInfo(VdsUpdateRunTimeInfo.java:542) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo.Refresh(VdsUpdateRunTimeInfo.java:383) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsManager.OnTimer(VdsManager.java:237) [vdsbroker.jar:] at sun.reflect.GeneratedMethodAccessor171.invoke(Unknown Source) [:1.7.0_25] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_25] at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_25] at org.ovirt.engine.core.utils.timer.JobWrapper.execute(JobWrapper.java:60) [scheduler.jar:] at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [quartz.jar:] at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557) [quartz.jar:]