[jira] [Updated] (SOLR-10643) Throttling strategy for triggers and policy executions

["Shalin Shekhar Mangar (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-10643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shalin Shekhar Mangar updated SOLR-10643:
-----------------------------------------
    Attachment: SOLR-10643.patch

This patch adds protection against points #1 and #3.
# The TriggerListener.triggerFired method now returns a boolean. The return value is true if the fire was ready to be processed by the listener otherwise not.
# If the value returned by the above was false then triggers are responsible for maintaining state such that the fire can be attempted again on subsequent executions until the listener returns true.
# The ScheduledTriggers class prevents triggers to be run between the time a previous trigger fire is submitted and it finishes execution
# In case multiple triggers were executing concurrently, it prevents trigger fires from stacking up on the action executor.
# Added javadocs in relevant places to document this behavior and expectations from subclasses of TriggerListener
# Added NodeAddedTriggerTest.testListenerAcceptance() to test this behavior

Todo
# Add similar test for NodeLostTrigger
# Add an integration test for this behavior
# Add rate limiting between action executions (point #2 in description)

Note that the {{waitFor}} implicitly specifies a cooling off period but for the same trigger only. We want another cooling off period between different triggers as well.

> Throttling strategy for triggers and policy executions
> ------------------------------------------------------
>
>                 Key: SOLR-10643
>                 URL: https://issues.apache.org/jira/browse/SOLR-10643
>             Project: Solr
>          Issue Type: Sub-task
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>              Labels: autoscaling
>             Fix For: master (7.0)
>
>         Attachments: SOLR-10643.patch
>
>
> We must ensure that triggers and policy executions:
> # Do not step on each other's toes by concurrent executions
> # Do not fire/execute too frequently
> # Do not stack up



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