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https://issues.apache.org/jira/browse/SOLR-13118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man reassigned SOLR-13118:
-------------------------------
Assignee: Hoss Man
Attachment: SOLR-13118.patch
In the attached patch, I've remedied this (in
{{TestSimTriggerIntegration.testNodeLostTriggerRestoreState}} ) via the
following (non-test) API changes:
* {{SimCloudManager}} now exposes a public {{getOverseerTriggerThread()}}
method – allowing Sim tests the same level of accesss to the
OverseerTriggerThread/ScheduledTriggers that non-sim tests can get via the
Overseer ode (by way of it's JettyRunner->CoreContainer)
* {{ScheduledTriggers}} now exposes a public (lucene.internal for tests only)
method to {{getTrigger(String name)}}
* {{TriggerBase}} has been refactored to expose a public (lucene.internal for
tests only) method to get a {{deepCopyState()}}
With these changes, the test(s) can now use the following flow...
* register an initial trigger w/an effectively infinite {{waitFor}}
configuration
* create the nodeAdd/nodeLost situation
* reach into the ScheduledTriggers in a {{TimeOut.waitFor(...)}} to inspect
the state of the trigger being tests to know once it's run() and detected the
situation/event and started tracking it
** but not yet executed any actions because of the {{waitFor}} property
* update the trigger w/ {{waitFor: 0s}}
* use the latches & event queues of the "mock" trigger actions to confirm that
the event state information gets preserved from one trigger instance to the
next, and ultimately process()ed
----
Unless there are any concerns with this approach, I'll try to update the other
similarly problematic tests ASAP...
* TestSimTriggerIntegration.testNodeAddedTriggerRestoreState
* NodeLostTriggerIntegrationTest.testNodeLostTriggerRestoreState
* NodeAddedTriggerIntegrationTest.testNodeAddedTriggerRestoreState
(I'd also like to look into re-writing
TestSimTriggerIntegration.testEventFromRestoredState to use an effectively
infinit {{waitFor}} and the new direct state introspection before & after
restarting the overseer rather then the current (delicately problematic)
precise sleep times ... but that's a lower priority at the moment that i
haven't fully thought through)
> Redesign integration tests for nodeAdded/nodeLost trigger state restoration
> ---------------------------------------------------------------------------
>
> Key: SOLR-13118
> URL: https://issues.apache.org/jira/browse/SOLR-13118
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Hoss Man
> Assignee: Hoss Man
> Priority: Major
> Attachments: SOLR-13118.patch
>
>
> The (integration) tests related to autoscaling nodeAdd/nodeLost trigger's and
> restoring their state are problematic for a lot of reasons.
> Beyond some silly implementation mistakes, a fundemental timing/concurrency
> issue is that (as designed) the tests have no way to ensure that "after"
> creating a nodeAdded/nodeLost situation, they can wait for the (first
> instance of) the trigger to run() and detect the situation (recording it in
> the trigger's internal state) so that the test can subsequently "update" the
> trigger, forcing a new instance to restore the old state and then execute the
> trigger actions. This can result i na lot of flaky-ness if the triggers
> don't run when "expected"
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