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https://issues.apache.org/jira/browse/CLOUDSTACK-9460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15424304#comment-15424304
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Abhinandan Prateek commented on CLOUDSTACK-9460:
------------------------------------------------
This issue has been intermittently being hit, but due to no easy way to
reproduce it, it has been closed without a fix.
https://issues.apache.org/jira/browse/CLOUDSTACK-2616
https://issues.apache.org/jira/browse/CLOUDSTACK-4878
The issue is that for a long running transaction like that of a snapshot that
runs into several hours, cloudstack holds the db connection for all that
duration. The operation succeeds on the cloud resource but when MS tries to
update the db it fails as the mysql connection it was holding has timed out.
estrator.prepare(VolumeOrchestrator.java:1322)
6023 at
com.cloud.vm.VirtualMachineManagerImpl.orchestrateStart(VirtualMachineManagerImpl.java:988)
6024 at
com.cloud.vm.VirtualMachineManagerImpl.orchestrateStart(VirtualMachineManagerImpl.java:4481)
6025 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
...
6044 Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
Communications link failure
6045
6046 The last packet successfully received from the server was 2,101,970
milliseconds ago. The last packet sent successfully to the server was 0
milliseconds ago.
..
6063 ... 52 more
6064 Caused by: java.io.EOFException: Can not read response from server.
Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
6065 ... 67 more
...
> Graceful handling of Mysql server connection timeout
> ----------------------------------------------------
>
> Key: CLOUDSTACK-9460
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9460
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Management Server
> Affects Versions: 4.9.0
> Reporter: Abhinandan Prateek
> Assignee: Abhinandan Prateek
> Fix For: 4.9.1
>
>
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