I also face this issue. Here is the snippet of logs. Please let me know if you need any other info.
2014-01-21 10:52:46,909 INFO [c.c.v.VirtualMachineManagerImpl] (Job-Executor-1:ctx-57a7ba8c ctx-933fbba1) Unable to contact resource. com.cloud.exception.ResourceUnavailableException: Resource [DataCenter:1] is unreachable: Unable to apply dhcp entry on router at com.cloud.network.router.VirtualNetworkApplianceManagerImpl.applyRules(Virt ualNetworkApplianceManagerImpl.java:3826) at com.cloud.network.router.VirtualNetworkApplianceManagerImpl.applyDhcpEntry( VirtualNetworkApplianceManagerImpl.java:2956) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:3 9) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp l.java:25) at java.lang.reflect.Method.invoke(Method.java:597) On 21/01/14 11:01 AM, "Alena Prokharchyk" <alena.prokharc...@citrix.com> wrote: >I¹ve deployed the latest master code, re-deployed the DB and uploaded new >system templates with 4.3 version. After that, UserVm fails to start >because DHCP entry fails to apply on the VR. >Its a xen host deployment, and I¹ve tested that ssh to the VR works just >fine. Sheng, can you please take a look? It happened on a couple of >setups. > >-Alena.