[jira] [Closed] (SOLR-12480) TriggerAction failures may cause inconsistent trigger behavior

["Alexandre Rafalovitch (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-12480?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexandre Rafalovitch closed SOLR-12480.
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> TriggerAction failures may cause inconsistent trigger behavior
> --------------------------------------------------------------
>
>                 Key: SOLR-12480
>                 URL: https://issues.apache.org/jira/browse/SOLR-12480
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: AutoScaling
>    Affects Versions: 7.4, master (8.0)
>            Reporter: Andrzej Bialecki 
>            Priority: Major
>
> The following issue occasionally appears when running {{TestLargeCluster.testNodeLost}}.
> The test kills a large number of nodes, waiting for a certain time between the kills. Depending on the sequence and the length of {{waitFor}} it may happen that when {{ExecutePlanAction}} processes MOVEREPLICA the target node may just have been killed. This results in an exception and a FAILED status of the action.
> However, this failure is not reported back to the trigger as unprocessed event because it happens asynchronously in the action executor (in {{ScheduledTriggers}}) - so the trigger happily resets its internal state to no longer track the lost node. As a result, replicas remain lost and even if there’s a Policy violation the event will not be generated again, and the number of replicas won’t go back to the original number.
> Also, {{ScheduledTriggers:311}} and 323 only logs the exception but doesn’t fire listeners with FAILED status, which is a bug.



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