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Posted to commits@cassandra.apache.org by "Arjun Ashok (Jira)" <ji...@apache.org> on 2026/10/06 07:11:00 UTC
[jira] [Updated] (CASSANALYTICS-193) Sidecar Client maxPoolSize Option Silently Ignored by HTTP Connection Pool
[ https://issues.apache.org/jira/browse/CASSANALYTICS-193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arjun Ashok updated CASSANALYTICS-193:
--------------------------------------
Bug Category: Parent values: Code(13163)Level 1 values: Bug - Unclear Impact(13164)
Discovered By: Code Inspection
Severity: Normal
Status: Open (was: Triage Needed)
> Sidecar Client maxPoolSize Option Silently Ignored by HTTP Connection Pool
> --------------------------------------------------------------------------
>
> Key: CASSANALYTICS-193
> URL: https://issues.apache.org/jira/browse/CASSANALYTICS-193
> Project: Apache Cassandra Analytics
> Issue Type: Bug
> Components: Reader
> Reporter: Yifan Cai
> Assignee: Arjun Ashok
> Priority: Normal
> Labels: lhf
>
> The Sidecar client's maxPoolSize configuration option is only applied to Vert.x's internal worker thread pool (Sidecar.java), never to the underlying HttpClientConfig used by VertxHttpClient to build the WebClient. As a result, the HTTP connection pool that actually bounds concurrent SSTable-download requests silently falls back to HttpClientConfig's own hardcoded default of 20 connections, regardless of what a user configures. This can cause download requests to queue behind the connection limit and stall long enough to trip the 600s BufferingInputStream timeout during bulk reads.
> Attaching a test that reproduces the TimeoutException due to connection pool exhaustion.
> https://github.com/yifan-c/cassandra-analytics/commit/04e683025f8127f4a1808ab3308eefa0f5171f84
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