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https://issues.apache.org/jira/browse/HTTPCLIENT-2394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arturo Bernal closed HTTPCLIENT-2394.
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Resolution: Won't Do
> Virtual Thread (JDK 21) support for classic CloseableHttpClient — disabled by
> default
> -------------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-2394
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2394
> Project: HttpComponents HttpClient
> Issue Type: New Feature
> Reporter: Arturo Bernal
> Priority: Major
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Add support to run the classic (blocking) HTTP transport on *JDK 21 Virtual
> Threads* while preserving the existing public API and error semantics. The
> feature is *disabled by default* and can be enabled via builder settings. An
> additional toggle allows running the response handler on a virtual thread as
> well.
> *Motivation*
> * Reduce platform thread usage and memory footprint under high concurrency.
> * Keep the blocking I/O programming model; no migration to the async API
> required.
> * Provide a simpler path than the Classic→Async adapter.
> *Scope*
> * Builder settings to enable virtual-thread execution and configure the
> executor.
> * Optional setting to execute {{HttpClientResponseHandler}} on a virtual
> thread.
> * Preserve current behavior for errors and closing:
> ** Task rejection → {{IOException("client closed", cause)}}
> ** Interruption → cancel task, restore interrupt flag, throw
> {{InterruptedIOException}}
> ** Execution errors → unwrap {{IOException}} / {{RuntimeException}} /
> {{{}Error{}}}, otherwise wrap in {{IOException}}
> * Runtime activation on *JDK 21+* (feature remains inactive on older JDKs).
> * Mark feature as *experimental* for one minor cycle.
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