[jira] [Created] (CASSANDRA-16211) Improve job metadata queries exception handling in cassandra-diff

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

Yifan Cai created CASSANDRA-16211:
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             Summary: Improve job metadata queries exception handling in cassandra-diff
                 Key: CASSANDRA-16211
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16211
             Project: Cassandra
          Issue Type: Improvement
          Components: Tool/diff
            Reporter: Yifan Cai
            Assignee: Yifan Cai


The job metadata tracks the progress of the diff job. Sometimes, a job can fail due to the progress update query failures. 
The progress update queries can be categorized into 2 groups, critical and trivial one. 
When a query failed to update a trivial status (e.g. ProgressTracker), we would mostly hope to continue the job and just log the failure. 
When a query failed to update a critical status (e.g. JobLifeCycle), we can apply the client-side retry strategy (e.g. exponential backoff) in addition to the retry policy.



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