Issues

• Interrupted response close cannot be retried

  encode/httpcore#1115 · Filter by author pentaoa opened on Sep 17, 2026

• Connection pool can close a connection it has already assigned to a queued request

  encode/httpcore#1110 · Filter by author moldhouse opened on Sep 12, 2026

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

  encode/httpcore#1093 · Filter by author seanmuth opened on Jul 13, 2026

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

  encode/httpcore#1089 · Filter by author easy6699 opened on Jun 21, 2026

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

  encode/httpcore#1082 · Filter by author ShivamB25 opened on May 11, 2026

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

  encode/httpcore#1080 · Filter by author balaji-g opened on Apr 30, 2026
  1

• Stale connection stays in pool after ConnectionNotAvailable

  encode/httpcore#1066 · Filter by author 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

  encode/httpcore#1063 · Filter by author 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

  encode/httpcore#1029 · Filter by author xiexianbin opened on Aug 31, 2025
  4

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

  encode/httpcore#1026 · Filter by author Mahdi-Ba opened on Aug 6, 2025
  1

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

  encode/httpcore#1023 · Filter by author janosik47 opened on Jul 26, 2025
  2

• Deadlock: Stream Synchronization Issue Between httpcore and h2

  encode/httpcore#1022 · Filter by author fcourtial opened on Jul 22, 2025
  2

• Timeouts are not applied during socks5 initialization.

  encode/httpcore#1015 · Filter by author Brranton opened on Jun 6, 2025
  1