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From GitBox <...@apache.org>
Subject [GitHub] [cloudstack] DmB991 opened a new issue #3526: Incorrect work of getFreeMemory() in LibvirtStartCommandWrapper.java
Date Fri, 26 Jul 2019 12:52:14 GMT
DmB991 opened a new issue #3526: Incorrect work of getFreeMemory() in LibvirtStartCommandWrapper.java
URL: https://github.com/apache/cloudstack/issues/3526
 
 
   ##### ISSUE TYPE
    * Bug Report
   
   ##### COMPONENT NAME
   ~~~
   LibvirtStartCommandWrapper.java
   ~~~
   
   ##### CLOUDSTACK VERSION
   ~~~
   4.10 +
   ~~~
   
   ##### CONFIGURATION
   N/A
   
   ##### OS / ENVIRONMENT
   N/A
   
   ##### SUMMARY
   I found error in getFreeMemory() of https://github.com/apache/cloudstack/blob/4.11/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtStartCommandWrapper.java#L170
   When I create a new VM we take a list of all VMs from libvirt via getFreeMemory(). After
that we iterate by this list. If amount of VMs so large(or libvirt response longer than always)
this may take some time. At that time one or more VMs, which has "Running" state can start
stopping by another process(job) and not displayed in libvirt anymore. So it bring to exception
with "libvirt.libvirtError: Domain not found: no domain with matching id 157124." message
and we move on catch with wrong error message(Failed to get free memory).
   
   ##### STEPS TO REPRODUCE
   ~~~
   1. Start one proces which will create VMs.
   2. When we have 100(create more if not reproduce) VMs on host should start another process
which will destroy VMs.
   3. Still some time we will see error message "Failed to get free memory" in logs with free
memory resources on host.
   ~~~
   management-server.log https://yadi.sk/d/wzyZVeTKS2kkDQ
   
   ##### EXPECTED RESULTS
   ~~~
   Correct creation of VM without exceptions.
   ~~~
   
   ##### ACTUAL RESULTS
   ~~~
   INFO message "Failed to get free memory" and ERROR with InsufficientCapacityEception.
   ~~~
   

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