Chris Curtin created KAFKA-782:
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Summary: 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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