Hi, all,

sometimes the system can't start a VM instance (a 530 error).
In the logs there is the following trace - how to troubleshoot it and 
understand which circumstances lead to it?


com.cloud.utils.exception.CloudRuntimeException: Unable to start VM instance
        at 
com.cloud.vm.VirtualMachineManagerImpl.orchestrateStart(VirtualMachineManagerImpl.java:4889)
        at sun.reflect.GeneratedMethodAccessor433.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
com.cloud.vm.VmWorkJobHandlerProxy.handleVmWorkJob(VmWorkJobHandlerProxy.java:107)
        at 
com.cloud.vm.VirtualMachineManagerImpl.handleVmWorkJob(VirtualMachineManagerImpl.java:5047)
        at com.cloud.vm.VmWorkJobDispatcher.runJob(VmWorkJobDispatcher.java:102)
        at 
org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:615)
        at 
org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
        at 
org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
        at 
org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
        at 
org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
        at 
org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
        at 
org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.run(AsyncJobManagerImpl.java:563)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

kind regards
Peter

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