Hi Sachin, I am told with confidence that the setting is present in server.properties (I do not have access to the server).
I have used delete before without issue, and attempted to use it when the setting is false and the behaviour is different. I'm certain that running the command multiple times always shows the warning, that without the setting being true, the command has no effect. In this case it confirms that the topic is marked for deletion. Thanks Adrian -----Original Message----- From: Sachin Mittal [mailto:sjmit...@gmail.com] Sent: 06 April 2017 19:05 To: users@kafka.apache.org Subject: Re: Topic deletion Do you have delete.topic.enable=true uncommented or present in server.properties On Thu, Apr 6, 2017 at 11:03 PM, Adrian McCague <adrian.mcca...@zopa.com> wrote: > Hi all, > > I am trying to understand topic deletion in kafka, there appears to be > very little documentation or answers on how this works. Typically they > just say to turn on the feature on the broker (in my case it is). > > I executed: > Kafka-topics.bat -delete -zookeeper keeperhere -topic mytopic > > Running this again yields: > Topic mytopic is already marked for deletion. > > --describe yields: > Topic: mytopic PartitionCount:6 ReplicationFactor:3 Configs: > retention.ms=0 > Topic: mytopic Partition: 0 Leader: -1 Replicas: > 1006,1001,1005 Isr: > Topic mytopic Partition: 1 Leader: -1 Replicas: > 1001,1005,1003 Isr: > Topic: mytopic Partition: 2 Leader: -1 Replicas: > 1005,1003,1004 Isr: > Topic: mytopic Partition: 3 Leader: -1 Replicas: > 1003,1004,1007 Isr: > Topic: mytopic Partition: 4 Leader: -1 Replicas: > 1004,1007,1006 Isr: > Topic: mytopic Partition: 5 Leader: -1 Replicas: > 1007,1006,1001 Isr: > > You can see that the deletion mark has meant that the Leader is -1. > Also I read somewhere that retention needs to be set to something low > to trigger the deletion, hence the config of retention.ms=0 > > Consumers (or streams in my case) no longer see the topic: > org.apache.kafka.streams.errors.TopologyBuilderException: Invalid > topology building: stream-thread [StreamThread-1] Topic not found: > mytopic > > And I can't create a new topic in its place: > [2017-04-06 18:26:00,702] ERROR > org.apache.kafka.common.errors.TopicExistsException: > Topic 'mytopic' already exists. (kafka.admin.TopicCommand$) > > I am a little lost as to where to go next, could someone explain how > topic deletion is actually applied when a topic is 'marked' for > deletion as that may help trigger it. > > Thanks! > Adrian > >
