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From Harsha <ka...@harsha.io>
Subject Re: Issue with topic deletion
Date Wed, 04 Feb 2015 05:19:48 GMT
you are probably handling it but there is a case where you call
deleteTopic and kafka goes through delete topic process but your
consumer is running probably made a TopicMetadataRequest for the same
topic which can re-create the topic with the default num.partitions and
replication.factor.  Did you try stopping the consumer first and issue
the topic delete.
-Harsha

On Tue, Feb 3, 2015, at 08:37 PM, Sumit Rangwala wrote:
> On Tue, Feb 3, 2015 at 6:48 PM, Harsha <kafka@harsha.io> wrote:
> 
> > Sumit,
> >        lets say you are deleting a older topic "test1" do you have any
> >        consumers running simultaneously for the topic "test1"  while
> >        deletion of topic going on.
> >
> 
> Yes it is the case. However, after a small period of time (say few
> minutes)
> there won't be any consumer running for the deleted topic.
> 
> 
> Sumit
> 
> 
> 
> 
> > -Harsha
> >
> > On Tue, Feb 3, 2015, at 06:17 PM, Joel Koshy wrote:
> > > Thanks for the logs - will take a look tomorrow unless someone else
> > > gets a chance to get to it today.
> > >
> > > Joel
> > >
> > > On Tue, Feb 03, 2015 at 04:11:57PM -0800, Sumit Rangwala wrote:
> > > > On Tue, Feb 3, 2015 at 3:37 PM, Joel Koshy <jjkoshy.w@gmail.com>
> > wrote:
> > > >
> > > > > Hey Sumit,
> > > > >
> > > > > I thought you would be providing the actual steps to reproduce :)
> > > > >
> > > >
> > > > I want to but some proprietary code prevents me to do it.
> > > >
> > > >
> > > > > Nevertheless, can you get all the relevant logs: state change logs
> > and
> > > > > controller logs at the very least and if possible server logs and
> > send
> > > > > those over?
> > > > >
> > > >
> > > > Here are all the logs you requested (there are three brokers in my
> > setup
> > > > k1, k2, k3): http://d.pr/f/1kprY/2quHBRRT (Gmail has issue with the
> > file)
> > > >
> > > >
> > > > Sumit
> > > >
> > > >
> > > >
> > > >
> > > > >
> > > > > Joel
> > > > >
> > > > > On Tue, Feb 03, 2015 at 03:27:43PM -0800, Sumit Rangwala wrote:
> > > > > > In my setup kafka brokers are set for auto topic creation. In
the
> > > > > scenario
> > > > > > below a node informs other nodes (currently 5 in total) about
 a
> > number
> > > > > of
> > > > > > new (non-existent) topics, and  all the nodes almost
> > simultaneously open
> > > > > a
> > > > > > consumer for each of those topics. Sometime later another node
> > informs
> > > > > all
> > > > > > other nodes of a new list of topics and each node, if they find
> > that an
> > > > > > older topic exists in kafka, goes ahead and deletes the older
> > topic.
> > > > > What I
> > > > > > have found is that many of the topics stay in the "marked for
> > deletion"
> > > > > > state forever.
> > > > > >
> > > > > >
> > > > > > I get the list of topics using ZkUtils.getAllTopics(zkClient)
and
> > delete
> > > > > > topics using AdminUtils.deleteTopic(zkClient, topic). Since
many
> > nodes
> > > > > > might try to delete the same topic at the same time I do
> > > > > > see ZkNodeExistsException while deleting the topic, which I
catch
> > an
> > > > > > ignore. (e.g.,
> > org.apache.zookeeper.KeeperException$NodeExistsException:
> > > > > > KeeperErrorCode = NodeExists for
> > > > > > /admin/delete_topics/LAX1-GRIFFIN-r13-1423001701601)
> > > > > >
> > > > > > # State of one deleted topic on kafka brokers:
> > > > > > Topic:LAX1-GRIFFIN-r13-1423001701601 PartitionCount:8
> > ReplicationFactor:1
> > > > > > Configs:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 0 Leader: -1
> > Replicas:
> > > > > > 49558 Isr:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 1 Leader: -1
> > Replicas:
> > > > > > 49554 Isr:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 2 Leader: -1
> > Replicas:
> > > > > > 49557 Isr:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 3 Leader: -1
> > Replicas:
> > > > > > 49558 Isr:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 4 Leader: -1
> > Replicas:
> > > > > > 49554 Isr:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 5 Leader: -1
> > Replicas:
> > > > > > 49557 Isr:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 6 Leader: -1
> > Replicas:
> > > > > > 49558 Isr:
> > > > > > Topic: LAX1-GRIFFIN-r13-1423001701601 Partition: 7 Leader: -1
> > Replicas:
> > > > > > 49554 Isr:
> > > > > >
> > > > > >
> > > > > > # Controller log says
> > > > > >
> > > > > > [2015-02-03 22:59:03,399] INFO [delete-topics-thread-49554],
> > Deletion for
> > > > > > replicas 49557,49554,49558 for partition
> > > > > >
> > > > >
> > [LAX1-GRIFFIN-r13-1423001701601,0],[LAX1-GRIFFIN-r13-1423001701601,6],[LAX1-GRIFFIN-r13-1423001701601,5],[LAX1-GRIFFIN-r13-1423001701601,3],[LAX1-GRIFFIN-r13-1423001701601,7],[LAX1-GRIFFIN-r13-1423001701601,1],[LAX1-GRIFFIN-r13-1423001701601,4],[LAX1-GRIFFIN-r13-1423001701601,2]
> > > > > > of topic LAX1-GRIFFIN-r13-1423001701601 in progress
> > > > > > (kafka.controller.TopicDeletionManager$DeleteTopicsThread)
> > > > > >
> > > > > > current time: Tue Feb  3 23:20:58 UTC 2015
> > > > > >
> > > > > >
> > > > > > Since I don't know the delete topic algorithm, I am not sure
why
> > sure
> > > > > these
> > > > > > topics are not garbage collected. I do have the complete setup
> > running in
> > > > > > docker right now on my local box so please let me know if any
more
> > info
> > > > > is
> > > > > > required to troubleshoot this issue.
> > > > > >
> > > > > >
> > > > > > Furthermore, does ZkUtils.getAllTopics(zkClient) return "marked
for
> > > > > > deletion" topic as well. If so, is there a easy way to get a
list
> > of
> > > > > active
> > > > > > topics (other than looking at all the topics in
> > /admin/delete_topics/ and
> > > > > > taking a set difference with the topics returned
> > > > > > by ZkUtils.getAllTopics(zkClient) )
> > > > > >
> > > > > > Sumit
> > > > > > (More setup info below)
> > > > > >
> > > > > >
> > > > > > Setup
> > > > > > --------
> > > > > > Zookeeper: 3.4.6
> > > > > > Kafka broker: 0.8.2-beta
> > > > > > Kafka clients: 0.8.2-beta
> > > > > >
> > > > > > # Kafka boker settings (all other settings are default 0.8.2-beta
> > > > > settings)
> > > > > > kafka.controlled.shutdown.enable: 'FALSE'
> > > > > > kafka.auto.create.topics.enable: 'TRUE'
> > > > > > kafka.num.partitions: 8
> > > > > > kafka.default.replication.factor: 1
> > > > > > kafka.rebalance.backoff.ms: 3000
> > > > > > kafka.rebalance.max.retries: 10
> > > > > > kafka.log.retention.minutes: 1200
> > > > > > kafka.delete.topic.enable: 'TRUE'
> > > > >
> > > > >
> > >
> >

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