[jira] [Created] (HBASE-24588) Normalizer plan execution is not consistent between plan types

["Nick Dimiduk (Jira)" <ji...@apache.org>]

Nick Dimiduk created HBASE-24588:
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             Summary: Normalizer plan execution is not consistent between plan types
                 Key: HBASE-24588
                 URL: https://issues.apache.org/jira/browse/HBASE-24588
             Project: HBase
          Issue Type: Bug
          Components: master, Normalizer
    Affects Versions: 2.3.0
            Reporter: Nick Dimiduk


I left a comment on a merged [commit|https://github.com/apache/hbase/commit/5d0e0fc5fd09bddb2d766d1e24e28e472961f454#r39987289] where a little discussion has blossomed. Right now the normalizer produces two types of plans: "split" or "merge". The master receives the list of plans and executes them in a simple loop. The way it does the actual execution is delegated off to the plan implementation.

The bug I noticed is that the two implementations are subtly different. Both use async APIs to submit procedures, but "split" blocks on completion while "merge" does not. Furthermore, because "split" blocks, it's able to capture any exception that's thrown, while "merge" cannot.

These implementations should be made consistent. My thinking at the moment is this {{execute}} method should instead be named {{submit}}, creating and returning the {{Future}} that represents whatever work it submitted, and the calling context should handle the resolution of those futures in a single place.



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