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https://issues.apache.org/jira/browse/KAFKA-3179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125612#comment-15125612
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ASF GitHub Bot commented on KAFKA-3179:
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GitHub user becketqin opened a pull request:
https://github.com/apache/kafka/pull/842
KAFKA-3179 Fix seek on compressed messages
The fix itself is simple.
Some explanation on unit tests. Currently we the vast majority of unit test
is running with uncompressed messages. I was initially thinking about run all
the tests using compressed messages. But it seems uncompressed messages are
necessary in a many test cases because we need the bytes sent and appended to
the log to be predictable. In most of other cases, it does not matter whether
the message is compressed or not, and compression will slow down the unit test.
So I just added one method in the BaseConsumerTest to send compressed messages
whenever we need it.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/becketqin/kafka KAFKA-3179
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/842.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #842
----
commit 0f5cd3184f63ba9ec93c4450f81e0222ae96b422
Author: Jiangjie Qin <[email protected]>
Date: 2016-02-01T01:38:37Z
KAFKA-3179 Fix seek on compressed messages
----
> Kafka consumer delivers message whose offset is earlier than sought offset.
> ---------------------------------------------------------------------------
>
> Key: KAFKA-3179
> URL: https://issues.apache.org/jira/browse/KAFKA-3179
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 0.9.0.0
> Reporter: Jiangjie Qin
> Assignee: Jiangjie Qin
> Fix For: 0.9.0.1
>
>
> This problem is reproducible by seeking to the middle a compressed message
> set. Because KafkaConsumer does not filter out the messages earlier than the
> sought offset in the compressed message. The message returned to user will
> always be the first message in the compressed message set instead of the
> message user sought to.
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