Description
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
Attachments
Attachments
Issue Links
- Is contained by
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SOLR-5473 Split clusterstate.json per collection and watch states selectively
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- Closed
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