log-backup: added more robust error handling for log backup advancer (#41083) #41199
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Signed-off-by: hillium <yujuncen@pingcap.com>
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This is an automated cherry-pick of #41083
Signed-off-by: hillium yujuncen@pingcap.com
What problem does this PR solve?
Issue Number: close #41082
Problem Summary:
When etcd client closes the channel, the current implementation would trivially exit without retry.
What is changed and how it works?
This PR make the etcd adapter send an error response when the channel is about to be closed.
It also added some logs so we can meet the real error of closing.
Check List
Tests
Release note
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