GitHub user zhan849 opened a pull request:
https://github.com/apache/helix/pull/204
[HELIX-705]: Participant duplicated state transition handling rework
Re-implemented helix task executor state transition message dedup logic,
and added tests for verifying it:
- Duplicated message in same batch: discard the later one
- Duplicated message in different batches, the later one should be
discarded if the first one is in progress
- During state transition, we should not rely on current state delta to get
partition's current state, but should lock on state model def (thread safety)
- Duplicated state transition (toState == currentState) should not result
in error, which is confusion, but should report success
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhan849/helix harry/participant-st-dedup
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/helix/pull/204.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #204
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commit 04f1ba9701ccfb4c55d44ab4bc159577c3afd68b
Author: Harry Zhang <hrzhang@...>
Date: 2018-06-25T22:55:14Z
[HELIX-705]: Participant duplicated state transition handling rework
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