[jira] [Created] (CASSANDRA-19575) StartupCheck error for read_ahead_kb

["Morten Joenby (Jira)" <ji...@apache.org>]

Morten Joenby created CASSANDRA-19575:
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             Summary: StartupCheck error for read_ahead_kb
                 Key: CASSANDRA-19575
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19575
             Project: Cassandra
          Issue Type: Bug
          Components: Local/Startup and Shutdown
            Reporter: Morten Joenby


We believe the StartupChecks.java has a minor bug here:
[https://github.com/apache/cassandra/blob/cassandra-4.1/src/java/org/apache/cassandra/service/StartupChecks.java#L737]
{code:java}
String deviceName = blockDirComponents[2].replaceAll("[0-9]*$", "");{code}
We are using a RAID setup with two disks, so removing the "[0-9]" makes the check fail:


cat /sys/block/md/queue/read_ahead_kb
cat: /sys/block/md/queue/read_ahead_kb: No such file or directory

It should be "md0" in our case, so removing the '0' won't work.



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