[CASSANDRA-5450] cluster : Host ID collision

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 1.2.0
• Component/s: Local/Config
• Labels: cluster

Environment

centos-6-x86_64, jdk1.6.0_30, cassandra1.2.0
4 nodes, 2 datacenter, 2 nodes for each datacenter

• Severity: Normal
• Assignee: Unassigned
• Reporter: nivance
• Created: 10/Apr/13 12:39
• Updated: 16/Apr/19 09:32
• Resolved: 11/Apr/13 02:14

Description

I follow the guide "Initializing a multiple node cluster" in url:
http://www.datastax.com/docs/1.2/initialize/cluster_init

the exception occurs below when start the second node:

java.lang.RuntimeException: Host ID collision between active endpoint /192.168.0.193 and /192.168.0.194 (id=4ebdbeea-2712-475b-a3e3-64b6e6b099a9)
at org.apache.cassandra.locator.TokenMetadata.updateHostId(TokenMetadata.java:227)
at org.apache.cassandra.service.StorageService.handleStateNormal(StorageService.java:1296)
at org.apache.cassandra.service.StorageService.onChange(StorageService.java:1157)
at org.apache.cassandra.service.StorageService.onJoin(StorageService.java:1895)
at org.apache.cassandra.gms.Gossiper.handleMajorStateChange(Gossiper.java:805)
at org.apache.cassandra.gms.Gossiper.applyStateLocally(Gossiper.java:883)
at org.apache.cassandra.gms.GossipDigestAck2VerbHandler.doVerb(GossipDigestAck2VerbHandler.java:43)
at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:56)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)

I track the source code. the function "getHostId" in class org.apache.cassandra.gms.Gossiper, diff endpoint it returns the same value,like:
/192.168.0.194 4ebdbeea-2712-475b-a3e3-64b6e6b099a9
/192.168.0.88 c375010a-c464-40c9-a7db-61de319a4cba
/192.168.3.21 4ebdbeea-2712-475b-a3e3-64b6e6b099a9
/192.168.0.193 4ebdbeea-2712-475b-a3e3-64b6e6b099a9
so, the exception occurs.

Is it a bug or is my Configuration wrong?