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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2021/12/29 02:42:44 UTC
[GitHub] [druid] FaxianZhao opened a new issue #12104: Historical request status cache cause stale data in historical which cannot be removed
FaxianZhao opened a new issue #12104:
URL: https://github.com/apache/druid/issues/12104
Please provide a detailed title (e.g. "Broker crashes when using TopN query with Bound filter" instead of just "Broker crashes").
### Affected Version
Since 0.12.0
### Description
```org.apache.druid.server.coordination.SegmentLoadDropHandler#requestStatuses``` cache all load/drop request status with LRU strategy, it will cause ABA issue.
For example,
Step 1: Coordinator ask historical-H drop segment-S
Step 2: Coordinator ask historical-H load segment-S
Step 3: Coordinator ask historical-H drop segment-S
if Step 1 and Step 3 requests gap less than druid.segmentCache.statusQueueMaxSize(default 100), Step 3 will trigger the cache of step 1, and skip remove segment logic.
Then Coordinator will ask historical-H to drop segment-S repeatedly, and historical-H always trigger the LRU cache.
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[GitHub] [druid] FaxianZhao closed issue #12104: Historical request status cache cause stale data in historical which cannot be removed
Posted by GitBox <gi...@apache.org>.
FaxianZhao closed issue #12104:
URL: https://github.com/apache/druid/issues/12104
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[GitHub] [druid] FaxianZhao commented on issue #12104: Historical request status cache cause stale data in historical which cannot be removed
Posted by GitBox <gi...@apache.org>.
FaxianZhao commented on issue #12104:
URL: https://github.com/apache/druid/issues/12104#issuecomment-1046794331
Fixed by #11717
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