Cassandra: Exiting due to error while processing commit log during initialization

Question

I was loading a large CSV into Cassandra using cassandra-loader.

The VM ran out of disk space during this process and crashed. I allocated more disk space to the VM

Answer 1

This is how I fixed the problem with commit logs. You should only do this if you don't care about preserving the state of your commit logs.

Try to restart cassandra using

sudo systemctl restart cassandra

Then I check

systemctl status cassandra

and see that the status is 'exited' so there is a problem. Check the logs for cassandra using

sudo less /var/log/cassandra/system.log

and see org.apache.cassandra.db.commitlog.CommitLogReplayer$CommitLogReplayException: Could not read commit log descriptor in file /var/lib/cassandra/commitlog/CommitLog-6-1498210233635.log

Because I don't care about preserving the state of Cassandra I delete all of the commit logs and it now boots up fine

sudo rm /var/lib/cassandra/commitlog/CommitLog* sudo systemctl restart cassandra

systemctl status cassandra (should confirm that it it now running)