[SOLR-18176] HttpShardHandler query throughput bottleneck from ZooKeeper#4237
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mlbiscoc wants to merge 1 commit intoapache:mainfrom
Open
[SOLR-18176] HttpShardHandler query throughput bottleneck from ZooKeeper#4237mlbiscoc wants to merge 1 commit intoapache:mainfrom
mlbiscoc wants to merge 1 commit intoapache:mainfrom
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HoustonPutman
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Mar 24, 2026
dsmiley
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Mar 24, 2026
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Nice!!!
Remember ./gradlew writeChangelog
Thankfully, org.apache.solr.servlet.HttpSolrCall is also asking for the cached version (2 places).
Makes me wonder, what other callers of getCollection (thus allowCached) were making a deliberate decision vs accidental? IMO the cached version should be the default, if there should even be a default.
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I agree. I thought about the same thing but I have no idea of the impact and potential consequences of making that change. |
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https://issues.apache.org/jira/browse/SOLR-18176
HttpShardHandler was bottlenecking in throughput due to
CloudReplicaSourcerecalling for ZooKeeper collection state with everydistribrequest due to the missingallowCache=trueparameter. This resulted in large CPU utilization in ZooKeeper and thesynchronizedcall blocking QTP threads waiting for zookeeper response.See JIRA above for more detailed information.