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Posted to commits@cassandra.apache.org by "Josh McKenzie (Jira)" <ji...@apache.org> on 2020/03/12 19:04:00 UTC
[jira] [Updated] (CASSANDRA-15339) Make available the known JMX
endpoints across the cluster
[ https://issues.apache.org/jira/browse/CASSANDRA-15339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Josh McKenzie updated CASSANDRA-15339:
--------------------------------------
Fix Version/s: 4.x
> Make available the known JMX endpoints across the cluster
> ---------------------------------------------------------
>
> Key: CASSANDRA-15339
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15339
> Project: Cassandra
> Issue Type: Improvement
> Components: Cluster/Gossip
> Reporter: Michael Semb Wever
> Assignee: Michael Semb Wever
> Priority: Normal
> Labels: 4.0-feature-freeze-review-requested
> Fix For: 4.x
>
>
> With the addition of multiple nodes running on the same server using different ports: CASSANDRA-7544 ; it becomes more difficult for third-party tools to easily connect to all nodes based on the jmx connection details to just one node.
> By adding jmx host and port to gossip, and saving it in {{system.peers_v2}}, the list of all jmx endpoints in a cluster can be fetch after just the initial successful jmx connection and the {{StorageServiceMBean.getJmxEndpoints()}} method.
> And example of the difficulty can be illustrated through the potential workaround…
> Such a third-party tool could make a native protocol connection, and via the driver obtain the list of all possible `host:port` native protocol connections, and make a connection to each of these then requesting the configuration virtual table, from which the jmx port can be obtained. This is a rather cumbersome approach, and can involve third-party tools having to add native connection functionality and dependencies. It's also currently not possible because CASSANDRA-14573 does not provide the jmx port (it only offers the yaml settings).
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