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From "Jiangjie Qin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-6264) Log cleaner thread may die on legacy segment containing messages whose offsets are too large
Date Mon, 22 Jan 2018 22:32:00 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-6264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16335046#comment-16335046

Jiangjie Qin commented on KAFKA-6264:

[~ewencp] The impact of this issue is nasty but the chance of hitting the problem seems low
enough. Perhaps we can include this into 1.1.0 and backport it to 1.0.2 if necessary.

> Log cleaner thread may die on legacy segment containing messages whose offsets are too
> --------------------------------------------------------------------------------------------
>                 Key: KAFKA-6264
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6264
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>    Affects Versions:, 1.0.0,
>            Reporter: Jiangjie Qin
>            Assignee: Jiangjie Qin
>            Priority: Critical
>             Fix For: 1.0.1
> We encountered a problem that some of the legacy log segments contains messages whose
offsets are larger than {{SegmentBaseOffset + Int.MaxValue}}.
> Prior to, we do not assert the offset of the messages when appending them to
the log segments. Due to KAFKA-5413, the log cleaner may append messages whose offset is greater
than {{base_offset + Int.MaxValue}} into the segment during the log compaction.
> After the brokers are upgraded, those log segments cannot be compacted anymore because
the compaction will fail immediately due to the offset range assertion we added to the LogSegment.
> We have seen this issue in the __consumer_offsets topic so it could be a general problem.
There is no easy solution for the users to recover from this case. 
> One solution is to split such log segments in the log cleaner once it sees a message
with problematic offset and append those messages to a separate log segment with a larger
> Due to the impact of the issue. We may want to consider backporting the fix to previous
affected versions.

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