kafka.tools

ReplicaVerificationTool

object ReplicaVerificationTool extends Logging

For verifying the consistency among replicas.

  1. start a fetcher on every broker. 2. each fetcher does the following 2.1 issues fetch request 2.2 puts the fetched result in a shared buffer 2.3 waits for all other fetchers to finish step 2.2 2.4 one of the fetchers verifies the consistency of fetched results among replicas

The consistency verification is up to the high watermark. The tool reports the max lag between the verified offset and the high watermark among all partitions.

If a broker goes down, the verification of the partitions on that broker is delayed until the broker is up again.

Caveats: 1. The tools needs all brokers to be up at startup time. 2. The tool doesn't handle out of range offsets.

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