Fusion Server 5.2.2 Release Notes


Release date: 20 October 2020

Component versions:

Solr 8.4.1

ZooKeeper 3.5.7

Spark 2.4.5

This patch addresses an issue that can cause a serious performance issue for high-scale deployments. Please upgrade from Fusion 5.2.1 to 5.2.2 as soon as possible. Contact your Customer Excellence representative if you have questions about the potential impact to your deployment.

Bug fixes


  • A serious bug is fixed that, under specific conditions, resulted in Fusion sending requests to the same replica for a specific Solr shard for every request. This effectively disabled load balancing, causing significant performance issues.