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https://issues.apache.org/jira/browse/KAFKA-782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592565#comment-13592565
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Chris Curtin commented on KAFKA-782:
------------------------------------
Confirmed same behavior with 0.8.0 HEAD as of 3/4/2013
> replicas not being displayed in TopicMetadataResponse when replica's Broker
> is shutdown
> ---------------------------------------------------------------------------------------
>
> Key: KAFKA-782
> URL: https://issues.apache.org/jira/browse/KAFKA-782
> Project: Kafka
> Issue Type: Bug
> Components: replication
> Affects Versions: 0.8
> Environment: $ uname -a
> Linux vrd01.atlnp1 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012
> x86_64 x86_64 x86_64 GNU/Linux
> $ java -version
> java version "1.6.0_25"
> Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
> Java HotSpot(TM) 64-Bit Server VM (build 20.0-b11, mixed mode)
> Kafka 0.8.0 loaded from HEAD on 1/29/2013
> Reporter: Chris Curtin
> Assignee: Neha Narkhede
>
> Setup
> - 4 nodes in the cluster
> - topic has 10 partitions, numbered 0-9 in the output below
> - configure the cluster so one of the nodes doesn't hold any leader copies of
> the partition. I did this by shutting down a node, waiting for reassignment
> of leaders and starting again
> Output of the TopicMetadataResponse call:
> Partition: 0:vrd01.atlnp1 R:[ vrd03.atlnp1 vrd04.atlnp1 vrd01.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1]
> Partition: 1:vrd01.atlnp1 R:[ vrd04.atlnp1 vrd01.atlnp1 vrd02.atlnp1] I:[
> vrd01.atlnp1 vrd04.atlnp1 vrd02.atlnp1]
> Partition: 2:vrd01.atlnp1 R:[ vrd01.atlnp1 vrd02.atlnp1 vrd03.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd02.atlnp1]
> Partition: 3:vrd03.atlnp1 R:[ vrd02.atlnp1 vrd03.atlnp1 vrd04.atlnp1] I:[
> vrd03.atlnp1 vrd04.atlnp1 vrd02.atlnp1]
> Partition: 4:vrd01.atlnp1 R:[ vrd03.atlnp1 vrd01.atlnp1 vrd02.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd02.atlnp1]
> Partition: 5:vrd03.atlnp1 R:[ vrd04.atlnp1 vrd02.atlnp1 vrd03.atlnp1] I:[
> vrd03.atlnp1 vrd04.atlnp1 vrd02.atlnp1]
> Partition: 6:vrd01.atlnp1 R:[ vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1]
> Partition: 7:vrd01.atlnp1 R:[ vrd02.atlnp1 vrd04.atlnp1 vrd01.atlnp1] I:[
> vrd01.atlnp1 vrd04.atlnp1 vrd02.atlnp1]
> Partition: 8:vrd03.atlnp1 R:[ vrd03.atlnp1 vrd02.atlnp1 vrd04.atlnp1] I:[
> vrd03.atlnp1 vrd04.atlnp1 vrd02.atlnp1]
> Partition: 9:vrd01.atlnp1 R:[ vrd04.atlnp1 vrd03.atlnp1 vrd01.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1]
> Note that vrd02.atlnp1 does not contain any leader replicas.
> Shutdown vrd02 normally. Run TopicMetadataResponse again:
> Partition: 0:vrd01.atlnp1 R:[ vrd03.atlnp1 vrd04.atlnp1 vrd01.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1]
> Partition: 1:vrd01.atlnp1 R:[ ] I:[]
> Partition: 2:vrd01.atlnp1 R:[ ] I:[]
> Partition: 3:vrd03.atlnp1 R:[ ] I:[]
> Partition: 4:vrd01.atlnp1 R:[ ] I:[]
> Partition: 5:vrd03.atlnp1 R:[ ] I:[]
> Partition: 6:vrd01.atlnp1 R:[ vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1]
> Partition: 7:vrd01.atlnp1 R:[ ] I:[]
> Partition: 8:vrd03.atlnp1 R:[ ] I:[]
> Partition: 9:vrd01.atlnp1 R:[ vrd04.atlnp1 vrd03.atlnp1 vrd01.atlnp1] I:[
> vrd01.atlnp1 vrd03.atlnp1 vrd04.atlnp1]
> Note that the partitions where vrd02 was in the replica set no longer show
> any replicas.
> Not clear if the list of replicas isn't being set correctly or the replicas
> aren't associated with the partition any longer.
> Java code:
> kafka.javaapi.consumer.SimpleConsumer consumer = new
> SimpleConsumer("vrd01.atlnp1",
> 9092,
> 100000,
> 64 * 1024, "test");
> List<String> topics2 = new ArrayList<String>();
> topics2.add("storm-anon");
> TopicMetadataRequest req = new TopicMetadataRequest(topics2);
> kafka.javaapi.TopicMetadataResponse resp = consumer.send(req);
> List<kafka.javaapi.TopicMetadata> data3 = resp.topicsMetadata();
> for (kafka.javaapi.TopicMetadata item : data3) {
> for (kafka.javaapi.PartitionMetadata part:
> item.partitionsMetadata() ) {
> String replicas = "";
> String isr = "";
> for (kafka.cluster.Broker replica: part.replicas() ) {
> replicas += " " + replica.host();
> }
> for (kafka.cluster.Broker replica: part.isr() ) {
> isr += " " + replica.host();
> }
> System.out.println( "Partition: " + part.partitionId() + ":"
> + part.leader().host() + " R:[ " + replicas + "] I:[" + isr + "]");
> }
> }
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