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• FailedPartitionsCount - Count of partitions that have failed. Instead of separate metrics, clientId is used as a tag to distinguish between Replica and ReplicaAlterLogDir fetchers, keeping it consistent with metrics metric like MaxLag.

Proposed Changes

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• The metric FailedPartitionCount would keep track of the failed partitions. It's a newly added metric which would handle partition failure in a better wayhelp keep track of failed partitions. It would  would avoid losing several healthy partitions in case partition failure occurs.

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