KAFKA-18509 Move StateChangeLogger to server-common module #20637
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chia7712
reviewed
Oct 6, 2025
| import org.slf4j.LoggerFactory; | ||
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| public class StateChangeLogger { | ||
| private static final Logger log = LoggerFactory.getLogger("state.change.logger"); |
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| public class StateChangeLogger { |
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Could you please add comments explaining the purpose of this class?
chia7712
approved these changes
Oct 6, 2025
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LGTM, test this patch locally, and it works well
astraea@4d06546d9896:/opt/kafka$ cat logs/state-change.log
[2025-10-06 14:49:48,720] INFO [Broker id=10686] Transitioning 1 partition(s) to local leaders. (state.change.logger)
[2025-10-06 14:49:48,722] INFO [Broker id=10686] Creating new partition chia-0 with topic id SSROqblKQnylcx-1TgPrPA. (state.change.logger)
[2025-10-06 14:49:48,735] INFO [Broker id=10686] Leader chia-0 with topic id Some(SSROqblKQnylcx-1TgPrPA) starts at leader epoch 0 from offset 0 with partition epoch 0, high watermark 0, ISR [10686], adding replicas [] and removing replicas [] . Previous leader None and previous leader epoch was -1. (state.change.logger)
[2025-10-06 14:49:48,891] INFO [Broker id=10686] Transitioning 1 partition(s) to local leaders. (state.change.logger)
[2025-10-06 14:49:48,900] INFO [Broker id=10686] Skipped the become-leader state change for chia-0 with topic id Some(SSROqblKQnylcx-1TgPrPA), partition registration PartitionRegistration(replicas=[10686], directories=[_Q5ubnelBuH_WhzwMDjmjA], isr=[10686], removingReplicas=[], addingReplicas=[], elr=[], lastKnownElr=[], leader=10686, leaderRecoveryState=RECOVERED, leaderEpoch=0, partitionEpoch=1) and isNew=false since it is already the leader with leader epoch 0. Current high watermark 0, ISR [10686], adding replicas [] and removing replicas []. (state.change.logger)
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the failed test is handled by #20620 |
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We can rewrite this class from scala to java and move to server-common
module. To maintain backward compatibility, we should keep the logger
name
state.change.logger.Reviewers: Chia-Ping Tsai [email protected]