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https://issues.apache.org/jira/browse/KAFKA-3465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16063675#comment-16063675
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Vahid Hashemian commented on KAFKA-3465:
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Yeah, we could improve the warning message of the tool. I can submit a PR for
it.
> kafka.tools.ConsumerOffsetChecker won't align with kafka New Consumer mode
> --------------------------------------------------------------------------
>
> Key: KAFKA-3465
> URL: https://issues.apache.org/jira/browse/KAFKA-3465
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 0.9.0.0
> Reporter: BrianLing
>
> 1. When we enable mirrorMake to migrate Kafka event from one to other with
> "new.consumer" mode:
> java -Xmx2G -server -XX:+UseG1GC -XX:MaxGCPauseMillis=20
> -XX:InitiatingHeapOccupancyPercent=35 -XX:+DisableExplicitGC
> -Djava.awt.headless=true -Dcom.sun.management.jmxremote
> -Dcom.sun.management.jmxremote.authenticate=false
> -Dcom.sun.management.jmxremote.ssl=false
> -Dkafka.logs.dir=/kafka/kafka-app-logs
> -Dlog4j.configuration=file:/kafka/kafka_2.10-0.9.0.0/bin/../config/tools-log4j.properties
> -cp :/kafka/kafka_2.10-0.9.0.0/bin/../libs/*
> -Dkafka.logs.filename=lvs-slca-mm.log kafka.tools.MirrorMaker lvs-slca-mm.log
> --consumer.config ../config/consumer.properties --new.consumer --num.streams
> 4 --producer.config ../config/producer-slca.properties --whitelist risk.*
> 2. When we use ConsumerOffzsetChecker tool, notice the lag won't changed and
> the owner is none.
> bin/kafka-run-class.sh kafka.tools.ConsumerOffsetChecker --broker-info
> --group lvs.slca.mirrormaker --zookeeper lvsdmetlvm01.lvs.paypal.com:2181
> --topic XXXX
> Group Topic Pid Offset logSize
> Lag Owner
> lvs.slca.mirrormaker XXXX 0 418578332 418678347 100015
> none
> lvs.slca.mirrormaker XXXX 1 418598026 418698338 100312
> none
> [Root Cause]
> I think it's due to 0.9.0 new feature to switch zookeeper dependency to kafka
> internal to store offset & consumer owner information.
> Does it mean we can not use the below command to check new consumer’s
> lag since current lag formula: lag= logSize – offset
> https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/tools/ConsumerOffsetChecker.scala#L80
>
> https://github.com/apache/kafka/blob/0.9.0/core/src/main/scala/kafka/tools/ConsumerOffsetChecker.scala#L174-L182
> => offSet Fetch from zookeeper instead of from Kafka
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