slavkap commented on issue #3949: Fix CloudRuntimeException of migrated volume 
for Volume stats
URL: https://github.com/apache/cloudstack/pull/3949#issuecomment-598190351
 
 
   @Spaceman1984 thanks that you spend time to test it! My bad that I didn't 
pull the latest changes and the fix is from #3884 where mgmt sends the path 
rather than the UUID of the volume. Unfortunately I couldn't reproduce the NPE 
that you hit.
   I have tested it with the latest changes and in this case you wouldn't get 
the runtime exception. I think that the exception is not hidden because we send 
it back to the management for example like this: 
   DEBUG [c.c.a.m.AgentManagerImpl] (StatsCollector-2:ctx-bc39a30f) 
(logid:cd207a3e) Details from executing class 
com.cloud.agent.api.GetVolumeStatsCommand: Can't get vm disk stats: Unable to 
attach volume a43deb8f-b8b5-4e73-9043-76298cacd27b. Error:  Error: volume 
'a43deb8f-b8b5-4e73-9043-76298cacd27b' does not exist.
   In such cases when CloudRuntimeException is thrown we won't fill up the 
agent's log with the stack trace
   

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