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

["Chris Lohfink (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-7254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14040372#comment-14040372 ] 

Chris Lohfink edited comment on CASSANDRA-7254 at 6/23/14 3:15 AM:
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My thoughts:
* remove rmi port option until jvm fixed
* write a java app (platform independent, would have to work in many environments) that checks ports being open with appropariate and execute it in the bat/sh scripts to give a better warning
* custom java agent that would do kind of a "preflight check" on startup, giving some appropriate warnings if any ports are used etc
* ignore it until fixed (not ideal, but complexity for fixes might be worse then error)

any feedback on a good approach?


was (Author: cnlwsu):
My thoughts:
* remove rmi port option until jvm fixed
* write a java app (platform independent, would have to work in many environments) that checks ports being open with appropariate and execute it in the bat/sh scripts to give a better warning
* custom java agent that would do kind of a "preflight check" on startup, giving some appropriate warnings if any ports are used etc
* ignore it until fixed (not ideal, but complexity for fixes might be worse then error)
any feedback on a good approach?

> 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: Chris Lohfink
>            Priority: Minor
>             Fix For: 2.1.0
>
>
> 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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