Fix MSan failure in MergeTree background task #11420
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alesapin
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Jun 4, 2020
KochetovNicolai
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Jun 8, 2020
Fix MSan failure in MergeTree background task (cherry picked from commit 0a453f5)
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Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Fix potential uninitialized memory read in MergeTree shutdown if table was not created successfully.
Detailed description:
https://clickhouse-test-reports.s3.yandex.net/0/8bf8b44510235cbd72c3aa59f47b227ac31b75bb/stress_test_(memory)/stderr.log
The issue happens when MergeTree table tries to create two background tasks in
startupand fails in the middle. The methodstartupwas not exception safe.