Paul McArthur created SOLR-17895:
------------------------------------
Summary: Persistent ZNodes are leaked when running Solr Cloud with
distributed collection commands
Key: SOLR-17895
URL: https://issues.apache.org/jira/browse/SOLR-17895
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 9.0, 10.0
Reporter: Paul McArthur
When a collection command is executed in distributed mode
(DistributedCollectionCommandRunner), an ephemeral ZNode is created to lock the
collection, shard or replica that prevents other commands from executing
concurrently and potentially conflicting with each other.
The ephemeral nodes are created in a tree structure under
{_}*distributedapi/collectionlocks*{_}, with persistent znodes created for
- \{collName}
- \{collName}/Locks
- \{collName}/_\{shard}
- \{collName}/_\{shard}/Locks
- \{collName}/_\{shard}/_replica
These nodes are never deleted from ZooKeeper, even when the collection is
deleted, and can therefore accrue over time.
In our specific case, we have accumulated many thousands of these nodes over a
few months. While there appears to be no direct impact on performance, these
nodes should nonetheless be removed when they are no longer required.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
