kv/client: fix region worker exited error (#1903) #1919
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This is an automated cherry-pick of #1903
What problem does this PR solve?
Fix
region_worker
does not exit when TiKV store disconnect happens and region worker is set to exit manually. Unit test will be added later. Fix #1905 and #1904What is changed and how it works?
The
eventHandler
should return a non-nil error when region worker is notified to exit, which will terminate other routines under the sameerrgroup
to exitCheck List
Tests
Release note