[jira] [Created] (CASSANDRA-7254) NPE on startup if another Cassandra instance is already running

["Tyler Hobbs (JIRA)" <ji...@apache.org>]

Tyler Hobbs created CASSANDRA-7254:
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             Summary: NPE on startup if another Cassandra instance is already running
                 Key: CASSANDRA-7254
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7254
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Tyler Hobbs
            Priority: Minor


After CASSANDRA-7087, if you try to start cassandra while another instance is already running, you'll see something like this:

{noformat}
$ bin/cassandra -f
Error: Exception thrown by the agent : java.lang.NullPointerException
{noformat}

This is probably a JVM bug, but we should confirm that, open a JVM ticket, and see if we can give a more useful error message on the C* side.




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