I'm running a Cassandra cluster with version 2.2.4. The cluster consists of 3 nodes. When I start repair using nodetool repair command i got the following error. and further it is not proceeding.
root@ems:/opt/apache-cassandra-2.2.4/bin# ./nodetool repair
[2017-05-16 00:26:37,919] Starting repair command #47, repairing keyspace contexxio with repair options (parallelism: parallel, primary range: false, incremental: true, job threads: 1, ColumnFamilies: [], dataCenters: [], hosts: [], # of ranges: 768)
[2017-05-16 00:26:39,571] Repair completed successfully
[2017-05-16 00:26:39,574] Repair command #47 finished in 1 second
[2017-05-16 00:26:39,606] Starting repair command #48, repairing keyspace watchtower_keyspace with repair options (parallelism: parallel, primary range: false, incremental: true, job threads: 1, ColumnFamilies: [], dataCenters: [], hosts: [], # of ranges: 509)
[2017-05-16 00:26:40,555] Repair session dbbf6510-39ef-11e7-8027-d710f406f829 for range (-4631786651008530880,-4578496872070625882] failed with error [repair #dbbf6510-39ef-11e7-8027-d710f406f829 on watchtower_keyspace/release_stages, (-4631786651008530880,-4578496872070625882]] Validation failed in /10.128.133.99 (progress: 0%)
can any please one help me out of this .
To solve this.
Execute nodetool scrub
in the affected node. it solved the issue related to Cassandra Validation failed error.
1) Make sure all nodes are up and ok.
2) Go to the node with specified IP (in the log you've attached, and check system and debug logs).
3) Make sure there is no other repair processes going on/stuck. To verify it, start with running nodetool compactionstats and nodetool netstats on all nodes. If possible, attach the outputs to the question.
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