Handling schema disagreements

Check for and resolve schema disagreements.

Check for and resolve schema disagreements.

In the event that a schema disagreement occurs, check for and resolve schema disagreements as follows:

Procedure

  1. Run the nodetool describecluster command. 
    C:\> %CASSANDRA_HOME%\nodetool describecluster
    If any node is UNREACHABLE, you see output something like this:
    C:\> %CASSANDRA_HOME%\nodetool describecluster
Snitch: org.apache.cassandra.locator.DynamicEndpointSnitch
Partitioner: org.apache.cassandra.dht.Murmur3Partitioner
Schema versions:
  UNREACHABLE: 1176b7ac-8993-395d-85fd-41b89ef49fbb: [10.202.205.203]
               9b861925-1a19-057c-ff70-779273e95aa6: [10.80.207.102]
               8613985e-c49e-b8f7-57ae-6439e879bb2a: [10.116.138.23]
  2. Restart unreachable nodes.
  3. Repeat steps 1 and 2 until nodetool describecluster shows that all nodes have the same schema version number―only one schema version appears in the output.