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From "Noble Paul (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-5474) Add stateFormat=2 support to CloudSolrServer
Date Thu, 19 Jun 2014 16:28:26 GMT

     [ https://issues.apache.org/jira/browse/SOLR-5474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Noble Paul updated SOLR-5474:
-----------------------------

    Summary: Add  stateFormat=2 support to CloudSolrServer  (was: Add  stateFormat=2 support
to C;oudSolrServer)

> Add  stateFormat=2 support to CloudSolrServer
> ---------------------------------------------
>
>                 Key: SOLR-5474
>                 URL: https://issues.apache.org/jira/browse/SOLR-5474
>             Project: Solr
>          Issue Type: Sub-task
>          Components: SolrCloud
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>             Fix For: 5.0
>
>         Attachments: SOLR-5474.patch, SOLR-5474.patch, SOLR-5474.patch, fail.logs
>
>
> In this mode SolrJ would not watch any ZK node
> It fetches the state  on demand and cache the most recently used n collections in memory.
> SolrJ would not listen to any ZK node. When a request comes for a collection ‘xcoll’
> it would first check if such a collection exists
> If yes it first looks up the details in the local cache for that collection
> If not found in cache , it fetches the node /collections/xcoll/state.json and caches
the information
> Any query/update will be sent with extra query param specifying the collection name ,
version (example \_stateVer=xcoll:34) . A node would throw an error (INVALID_NODE) if it does
not have the right version
> If SolrJ gets INVALID_NODE error it would invalidate the cache and fetch fresh state
information for that collection (and caches it again)
> If there is a connection timeout, SolrJ assumes the node is down and re-fetch the state
for the collection and try again



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