[JIRA] (OVIRT-619) Jenkins times out when fetching from gerrit randomly

[eyal edri [Administrator] (oVirt JIRA)]

     [ https://ovirt-jira.atlassian.net/browse/OVIRT-619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

eyal edri [Administrator] updated OVIRT-619:
--------------------------------------------
    Resolution: Fixed
        Status: Done  (was: To Do)

Wasn't seen since we upgraded gerrit VM to be x4 stronger with more mem & cpu.


> Jenkins times out when fetching from gerrit randomly 
> -----------------------------------------------------
>
>                 Key: OVIRT-619
>                 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-619
>             Project: oVirt - virtualization made easy
>          Issue Type: Task
>            Reporter: Nadav Goldin
>            Assignee: infra
>            Priority: High
>
> At the first stage of ovirt-engine jobs, Jenkins attemps to fetch ovirt-engine, this sometimes fail with the following error:
> {quote}
> 12:55:02 hudson.plugins.git.GitException: Command "git fetch --tags --progress git://gerrit.ovirt.org/ovirt-engine.git +refs/heads/*:refs/remotes/origin/*" returned status code 143:
> {quote}
> It can time out while downloading(and then you see 'counting objects messages') or sometimes it simply fails after 10 times(which is set as the time out parameter for git)
> So far I've tested few issues:
> # Tried cloning ovirt-engine from one of the slaves for 300-500 times in a row, outside of Jenkins. This showed we have around a 6.5%  failure rate with a time out of 90 seconds, which should be reasonable as the current engine is 244MB.
> # Some of the exceptions appear in the Gerrit error_log as: 
> {quote}
> [2016-06-29 19:18:26,933] [NioProcessor-1] WARN com.google.gerrit.sshd.GerritServerSession : Exception caught org.apache.sshd.common.SshException: Received 97 on unknown channel 0
>         at org.apache.sshd.common.session.AbstractConnectionService.getChannel(AbstractConnectionService.java:301){quote}
> however, there was no one-to-one match between failing to clone and the exceptions in gerrit.
> # Did the same test but from our github mirror, there were almost no failures at all(less than 1%)



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