cherry-pick some PRs 2 round#11
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3AceShowHand merged 3 commits intopingcap:v1.41.2-pingcapfrom Apr 17, 2026
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This _should_ be a rare edge case as the updateBroker func is only called from updateMetadata which does already do an up-front `client.Close()` check under read-lock before then acquiring the write lock. However, there's potentially a small window of opportunity that if client.Close() was called whilst metadata refresh was in-flight and for whatever reason the updateMetadata goroutine gets pre-empted in-between the readlock release and the write lock acquire then the client could have been closed and so `client.brokers` will be nil. I wouldn't have expected this to ever happen, but it was reported by a user in an older Sarama version in IBM#3391 and there's no harm in adding the nilguard just in case. Signed-off-by: Dominic Evans <dominic.evans@uk.ibm.com>
…figs (IBM#2472) Signed-off-by: zhuliquan <zlqlovecode@foxmail.com> Co-authored-by: zhuliquan <zlq164114@sina.com>
This is retriable according to the spec: https://kafka.apache.org/protocol.html Signed-off-by: Richard Artoul <richardartoul@gmail.com>
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