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https://issues.apache.org/jira/browse/KAFKA-6679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16405478#comment-16405478
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Ari Uka edited comment on KAFKA-6679 at 3/19/18 9:27 PM:
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So the records seem to be v2, in this case, there were 5 records. This is what
the header looked like:
`
baseOffset: 17360912 lastOffset: 17360916 baseSequence: -1 lastSequence: -1
producerId: -1 producerEpoch: -1 partitionLeaderEpoch: 27 isTransactional:
false position: 267886748 CreateTime: -1 isvalid: true size: 762 magic: 2
compresscodec: NONE crc: 3599616919`
so I dumped this via `hd`, the hex dump of the header looks like this:
`hd -s 267886748 -n 762 -C 00000000000016325357.log`
{noformat}
0ff7a09c 00 00 00 00 01 08 e8 10 00 00 02 ee 00 00 00 1b |................|
0ff7a09c 00 00 00 00 01 08 e8 10 00 00 02 ee 00 00 00 1b |................|
0ff7a0ac 02 d6 8d cb 97 00 00 00 00 00 04 ff ff ff ff ff |................|
0ff7a0ac 02 d6 8d cb 97 00 00 00 00 00 04 ff ff ff ff ff |................|
0ff7a0bc ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0ff7a0bc ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0ff7a0cc ff ff ff ff ff ff ff ff ff 00 00 00 05 8e 02 00 |................|
0ff7a0cc ff ff ff ff ff ff ff ff ff 00 00 00 05 8e 02 00
|................|{noformat}
Is it normal for the CRC and magic portion to be duplicated like that?
was (Author: ari6123):
So the records seem to be v2, in this case, there were 5 records. This is what
the header looked like:
`
baseOffset: 17360912 lastOffset: 17360916 baseSequence: -1 lastSequence: -1
producerId: -1 producerEpoch: -1 partitionLeaderEpoch: 27 isTransactional:
false position: 267886748 CreateTime: -1 isvalid: true size: 762 magic: 2
compresscodec: NONE crc: 3599616919`
so I dumped this via `hd`, the hex dump of the header looks like this:
`hd -s 267886748 -n 762 -C 00000000000016325357.log`
{{0ff78cb2 00 00 00 00 01 08 e7 ef 00 00 00 c6 00 00 00 1b |................|}}
{{ 0ff78cb2 00 00 00 00 01 08 e7 ef 00 00 00 c6 00 00 00 1b |................|}}
{{ 0ff78cc2 02 6e c1 b7 8d 00 00 00 00 00 00 ff ff ff ff ff |.n..............|}}
{{ 0ff78cc2 02 6e c1 b7 8d 00 00 00 00 00 00 ff ff ff ff ff |.n..............|}}
Is it normal for the CRC and magic portion to be duplicated like that?
> Random corruption (CRC validation issues)
> ------------------------------------------
>
> Key: KAFKA-6679
> URL: https://issues.apache.org/jira/browse/KAFKA-6679
> Project: Kafka
> Issue Type: Bug
> Components: consumer, replication
> Affects Versions: 0.10.2.0, 1.0.1
> Environment: FreeBSD 11.0-RELEASE-p8
> Reporter: Ari Uka
> Priority: Major
>
> I'm running into a really strange issue on production. I have 3 brokers and
> randomly consumers will start to fail with an error message saying the CRC
> does not match. The brokers are all on 1.0.1, but the issue started on 0.10.2
> with the hope that upgrading would help fix the issue.
> On the kafka side, I see errors related to this across all 3 brokers:
> ```
> [2018-03-17 20:59:58,967] ERROR [ReplicaFetcher replicaId=3, leaderId=1,
> fetcherId=0] Error for partition topic-a-0 to broker
> 1:org.apache.kafka.common.errors.CorruptRecordException: This message has
> failed its CRC checksum, exceeds the valid size, or is otherwise corrupt.
> (kafka.server.ReplicaFetcherThread)
> [2018-03-17 20:59:59,411] ERROR [ReplicaManager broker=3] Error processing
> fetch operation on partition topic-b-0, offset 23848795
> (kafka.server.ReplicaManager)
> org.apache.kafka.common.errors.CorruptRecordException: Record size is smaller
> than minimum record overhead (14).
> [2018-03-17 20:59:59,411] ERROR [ReplicaManager broker=3] Error processing
> fetch operation on partition topic-b-0, offset 23848795
> (kafka.server.ReplicaManager)
> org.apache.kafka.common.errors.CorruptRecordException: Record size is smaller
> than minimum record overhead (14)
> [2018-03-17 20:59:59,490] ERROR [ReplicaFetcher replicaId=3, leaderId=2,
> fetcherId=0] Error for partition topic-c-2 to broker
> 2:org.apache.kafka.common.errors.CorruptRecordException: This message has
> failed its CRC checksum, exceeds the valid size, or is otherwise corrupt.
> (kafka.server.ReplicaFetcherThread)
> ```
>
> To fix this, I have to use the kafka-consumer-groups.sh command line tool and
> do a binary search until I can find a non corrupt message and push the
> offsets forward. It's annoying because I can't actually push to a specific
> date because kafka-consumer-groups.sh starts to emit the same error,
> ErrInvalidMessage, CRC does not match.
> The error popped up again the next day after fixing it tho, so I'm trying to
> find the root cause.
> I'm using the Go consumer [https://github.com/Shopify/sarama] and
> [https://github.com/bsm/sarama-cluster].
> At first, I thought it could be the consumer libraries, but the error happens
> with kafka-console-consumer.sh as well when a specific message is corrupted
> in Kafka. I don't think it's possible for Kafka producers to actually push
> corrupt messages to Kafka and then cause all consumers to break right? I
> assume Kafka would reject corrupt messages, so I'm not sure what's going on
> here.
> Should I just re-create the cluster, I don't think it's hardware failure
> across the 3 machines tho.
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