[
https://issues.apache.org/jira/browse/SOLR-3174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13247648#comment-13247648
]
Mark Miller commented on SOLR-3174:
-----------------------------------
The reason it's kind of complicated is because when a node is shutdown or dies,
it's published state does not get updated...so a down node could be listed as
active. Because of this, the true state is a mix of /live_nodes and the state.
If the node_name is listed under /live_nodes, then the state is the truth - if
the node is not listed under /live_nodes, the state for the node could be
anything and indicates nothing - the node is down and not part of the cluster.
For example:
{noformat}
[{
"num_shards":"2",
"shard":"shard1",
"state":"active",
"core":"",
"collection":"collection1",
"node_name":"halfmetal:7574_solr",
"base_url":"http://halfmetal:7574/solr"}]
{noformat}
This node is listed as active, but looking at /live_nodes:
{noformat}
/live_nodes/halfmetal:8983_solr
/live_nodes/halfmetal:9983_solr
/live_nodes/halfmetal:3983_solr
{noformat}
It's 'node_name' is not listed, and so the node should be considered 'gone'.
This is actually different than the 'down' state - a node might be listed in
/live_nodes, meaning it's part of the cluster, but have a state of 'down'
because it could not properly start.
> Visualize Cluster State
> -----------------------
>
> Key: SOLR-3174
> URL: https://issues.apache.org/jira/browse/SOLR-3174
> Project: Solr
> Issue Type: New Feature
> Components: web gui
> Reporter: Ryan McKinley
> Assignee: Stefan Matheis (steffkes)
> Attachments: SOLR-3174-graph.png, SOLR-3174-graph.png,
> SOLR-3174-rgraph.png, SOLR-3174-rgraph.png, SOLR-3174.patch, SOLR-3174.patch
>
>
> It would be great to visualize the cluster state in the new UI.
> See Mark's wish:
> https://issues.apache.org/jira/browse/SOLR-3162?focusedCommentId=13218272&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13218272
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
