Janmejay Singh created SOLR-8973: ------------------------------------ Summary: TX-frenzy on Zookeeper when collection is put to use Key: SOLR-8973 URL: https://issues.apache.org/jira/browse/SOLR-8973 Project: Solr Issue Type: Bug Components: SolrCloud Affects Versions: 5.5, 5.4, 5.3, 5.2, 5.1, 5.0, master, 5.6 Reporter: Janmejay Singh
This is to do with a distributed data-race. Core-creation happens at a time when collection is not yet visible to the node. In this case a fallback code-path is used which de-references collection-state lazily (on demand) as opposed to setting a watch and keeping it cached locally. Due to this, as requests towards the core mount, it generates ZK fetch for collection proportionately. On a large solr-cloud cluster, this generates several Gbps of TX traffic on ZK nodes. This affects indexing throughput(which floors) in addition to running ZK node out of network bandwidth. On smaller solr-cloud clusters its hard to run into, because probability of this race materializing reduces. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org