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https://issues.apache.org/jira/browse/KAFKA-15144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17739868#comment-17739868
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Edoardo Comar commented on KAFKA-15144:
---------------------------------------
Experimenting a bit, setting
{color:#000000}offset.lag.max={color}{color:#a31515}1{color}
and then running a console producer and consumer on the source,
I still see puzzling checkpoints despite what looks a correct offset sync :
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=0,
downstreamOffset=0}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=2,
downstreamOffset=2}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=4,
downstreamOffset=4}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=6,
downstreamOffset=6}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=8,
downstreamOffset=8}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=10,
downstreamOffset=10}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=12,
downstreamOffset=12}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=14,
downstreamOffset=14}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=16,
downstreamOffset=16}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=18,
downstreamOffset=18}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=20,
downstreamOffset=20}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=22,
downstreamOffset=22}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=24,
downstreamOffset=24}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=26,
downstreamOffset=26}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=28,
downstreamOffset=28}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=30,
downstreamOffset=30}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=32,
downstreamOffset=32}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=34,
downstreamOffset=34}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=36,
downstreamOffset=36}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=38,
downstreamOffset=38}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=40,
downstreamOffset=40}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=42,
downstreamOffset=42}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=44,
downstreamOffset=44}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=46,
downstreamOffset=46}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=48,
downstreamOffset=48}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=50,
downstreamOffset=50}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=52,
downstreamOffset=52}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=54,
downstreamOffset=54}
OffsetSync\{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=56,
downstreamOffset=56}
Checkpoint\{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, upstreamOffset=1,
downstreamOffset=1, metadata=}
Checkpoint\{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, upstreamOffset=2,
downstreamOffset=2, metadata=}
Checkpoint\{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, upstreamOffset=3,
downstreamOffset=3, metadata=}
Checkpoint\{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, upstreamOffset=4,
downstreamOffset=4, metadata=}
Checkpoint\{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, upstreamOffset=5,
downstreamOffset=5, metadata=}
Checkpoint{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, *upstreamOffset=30,
downstreamOffset=29,* metadata=}
Checkpoint{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, *upstreamOffset=52,
downstreamOffset=51,* metadata=}
Checkpoint{consumerGroupId=edogroup,
topicPartition=source.vf-mirroring-test-edo-0, *upstreamOffset=57,
downstreamOffset=57,* metadata=}
I'd expect the upstreamOffset to be always the same as the upstreamOffset
there are no transactions, and the topic has been created fresh with MM2 running
> MM2 Checkpoint downstreamOffset stuck to 1
> ------------------------------------------
>
> Key: KAFKA-15144
> URL: https://issues.apache.org/jira/browse/KAFKA-15144
> Project: Kafka
> Issue Type: Bug
> Components: mirrormaker
> Reporter: Edoardo Comar
> Assignee: Edoardo Comar
> Priority: Major
> Attachments: edo-connect-mirror-maker-sourcetarget.properties
>
>
> Steps to reproduce :
> 1.Start the source cluster
> 2.Start the target cluster
> 3.Start connect-mirror-maker.sh using a config like the attached
> 4.Create a topic in source cluster
> 5.produce a few messages
> 6.consume them all with autocommit enabled
>
> 7. then dump the Checkpoint topic content e.g.
> {{% bin/kafka-console-consumer.sh --bootstrap-server localhost:9192 --topic
> source.checkpoints.internal --from-beginning --formatter
> org.apache.kafka.connect.mirror.formatters.CheckpointFormatter}}
> {{{}Checkpoint{consumerGroupId=edogroup,
> topicPartition=source.vf-mirroring-test-edo-0, upstreamOffset=3,
> {*}downstreamOffset=1{*}, metadata={}}}}
>
> the downstreamOffset remains at 1, while, in a fresh cluster pair like with
> the source topic created while MM2 is running,
> I'd expect the downstreamOffset to match the upstreamOffset.
> Note that dumping the offset sync topic, shows matching initial offsets
> {{% bin/kafka-console-consumer.sh --bootstrap-server localhost:9192 --topic
> mm2-offset-syncs.source.internal --from-beginning --formatter
> org.apache.kafka.connect.mirror.formatters.OffsetSyncFormatter}}
> {{{}OffsetSync{topicPartition=vf-mirroring-test-edo-0, upstreamOffset=0,
> downstreamOffset=0{}}}}
>
>
>
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