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https://issues.apache.org/jira/browse/CASSANDRA-7254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14053666#comment-14053666
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Joshua McKenzie commented on CASSANDRA-7254:
--------------------------------------------
I slipped in logic to check for existing pid from pidfile when I rewrote the
launch scripts so our only exposure on Windows is duplicate w/foreground mode.
I'll open a ticket to replicate this logic on the Windows side.
> 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
> Assignee: Brandon Williams
> Priority: Minor
> Fix For: 2.0.10, 2.1.0
>
> Attachments: 7254.txt
>
>
> 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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