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Cancelling requests under pool contention permanently leaks connection slots (AsyncConnectionPool → PoolTimeout)

Status: Open.

#1093In encode/httpcore;

· seanmuth opened on Jul 13, 2026

_init_socks5_connection ignores timeout — SyncStream.read() puts socket into infinite blocking mode

Status: Open.

#1089In encode/httpcore;

· easy6699 opened on Jun 21, 2026

HTTP/2 large request body can fail with negative flow-control window

Status: Open.

#1082In encode/httpcore;

· ShivamB25 opened on May 11, 2026

Add optional HTTP/2 PING keepalive to prevent idle connection timeouts

Status: Open.

#1080In encode/httpcore;

· balaji-g opened on Apr 30, 2026

Stale connection stays in pool after ConnectionNotAvailable

Status: Open.

#1066In encode/httpcore;

· themavik opened on Mar 19, 2026

When using httpx in a sync setting, we noticed that host names with trailing dots such as, myhost.mycompany.internal. (to mark them as fully qualified in the dns) were failing with

Status: Open.

#1063In encode/httpcore;

· rjduffner opened on Mar 9, 2026

Very slow when sending large amounts of data using httpx.Client Post, either with multi-threading or a single thread

Status: Open.

#1029In encode/httpcore;

· xiexianbin opened on Aug 31, 2025

Container resets/crashes when HTTP request reaches receive_response_headers.started in httpcore.http11 logs despite using timeouts and connection pooling

Status: Open.

#1026In encode/httpcore;

· Mahdi-Ba opened on Aug 6, 2025

Exceptions not handled properly in the proxy's AsyncTunnelHTTPConnection leading to the leaks and pool starvation

Status: Open.

#1023In encode/httpcore;

· janosik47 opened on Jul 26, 2025

Deadlock: Stream Synchronization Issue Between httpcore and h2

Status: Open.

#1022In encode/httpcore;

· fcourtial opened on Jul 22, 2025

Timeouts are not applied during socks5 initialization.

Status: Open.

#1015In encode/httpcore;

· Brranton opened on Jun 6, 2025