processor: fix task status is always flushed because of incorrect mod revision cache #1017
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amyangfei
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Codecov Report
@@ Coverage Diff @@
## master #1017 +/- ##
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- Coverage 32.1359% 31.6826% -0.4534%
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Files 101 101
Lines 11358 11066 -292
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- Hits 3650 3506 -144
+ Misses 7297 7167 -130
+ Partials 411 393 -18 |
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LGTM |
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LGTM |
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Oct 22, 2020
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@amyangfei merge failed. |
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@amyangfei merge failed. |
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Signed-off-by: ti-srebot <[email protected]>
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cherry pick to release-4.0 in PR #1019 |
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… revision cache (#1017) (#1019) Signed-off-by: ti-srebot <[email protected]>
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What problem does this PR solve?
After investigating the https://github.com/pingcap/ticdc/issues/993, found key
/tidb/cdc/task/status/<capture-id>/<changefeed-id>is always updated when processor callsflushTaskStatusAndPositionThis bug happens since v4.0.5
What is changed and how it works?
The fix is straightforward, check
newModRevisionreturned byAtomicPutTaskStatus,newModRevision=0means status is not updated, we don't update the mod revision cache.Check List
Tests
Related changes
Release note