[GitHub] csquire commented on issue #2890: KVMHAMonitor thread blocks indefinitely while NFS not available

2018-10-25 Thread GitBox
csquire commented on issue #2890: KVMHAMonitor thread blocks indefinitely while 
NFS not available
URL: https://github.com/apache/cloudstack/issues/2890#issuecomment-433081781
 
 
   When you block NFS on a host, eventually all the agentRequest-Handler and 
UgentTask threads gradually hang as well.  It seems after the last UgentTask 
handler thread hangs, is about the time the host is marked as Down.
   
   
[threaddump.txt](https://github.com/apache/cloudstack/files/2515449/threaddump.txt)
   


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[GitHub] csquire commented on issue #2890: KVMHAMonitor thread blocks indefinitely while NFS not available

2018-10-09 Thread GitBox
csquire commented on issue #2890: KVMHAMonitor thread blocks indefinitely while 
NFS not available
URL: https://github.com/apache/cloudstack/issues/2890#issuecomment-428282173
 
 
   After performing more tests, virtlockd does help prevent from getting 
duplicate VMs.  With Host HA disabled, the blocked host goes to a `Down` state 
but the VMs continue to run on the blocked host and new ones don't start on 
other hosts because of the lock on the root disk.
   
   But, if Host HA *is* enabled, the blocked host gets rebooted because of the 
bug above. The VMs on the host get rescheduled on that same host when it comes 
up, but it still should not have been rebooted because of blocked NFS.


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