GitHub user guozhangwang opened a pull request:
https://github.com/apache/kafka/pull/3130
KAFKA-5202: Handle topic deletion while trying to send txn markers
Here is the sketch of this proposal:
1. When handling `addPartition` request, the coordinator will check if all
its corresponding metadata exist in the metadata cache; if there is ANY one of
the partitions whose metadata is not available, return
UNKNOWN_TOPIC_OR_PARTITION.
2. When it is time to send the txn markers, only look for the leader node
of the partition once instead of retrying, and if that information is not
available, it means the partition is highly likely been removed since it was in
the cache before. In this case, we just remove the partition from the metadata
object and skip putting into the corresponding queue, and if all partitions'
leader broker are non-available, complete this delayed operation to proceed to
write the complete txn log entry.
One caveat of this approach is the delete-and-recreate case, and the
argument is that since all the messages are deleted anyways when deleting the
topic-partition, it does not matter whether the markers are on the log
partitions or not.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/guozhangwang/kafka K5202-handle-topic-deletion
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/3130.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 #3130
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commit 733f352bd9be29d1439844271f22508a2e4b2552
Author: Guozhang Wang <[email protected]>
Date: 2017-05-23T23:23:45Z
handle topic deletion
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