[jira] [Commented] (CASSANDRASC-86) Startup Validation Failures when Checking Sidecar Connectivity

["Yifan Cai (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRASC-86?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17811406#comment-17811406 ] 

Yifan Cai commented on CASSANDRASC-86:
--------------------------------------

+1 on the sidecar patch, assume the CI is green. Please post the CI link. 

I think it would be clearer to create a dedicated Jira ticket for the analytics patch. 

> Startup Validation Failures when Checking Sidecar Connectivity
> --------------------------------------------------------------
>
>                 Key: CASSANDRASC-86
>                 URL: https://issues.apache.org/jira/browse/CASSANDRASC-86
>             Project: Sidecar for Apache Cassandra
>          Issue Type: Improvement
>          Components: Configuration
>            Reporter: Yuriy Semchyshyn
>            Assignee: Yuriy Semchyshyn
>            Priority: Normal
>              Labels: pull-request-available
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> We have experienced repeated startup validation failures caused by Sidecar health checks for some jobs with a large number of Spark executors.
> These failures are likely caused by the thundering herd problem, and have been so far worked around by disabling startup validations altogether.
> In order to prevent them going forward, a random delay needs to be added between retries of health checks in Sidecar client.
> It is also worth increasing the overall timeout for Sidecar health checks from current 30 seconds to 60 seconds.



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