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After\nevery other error, _get_conns() returned a placeholder. This is wrong\nwhen create() fails for a new connection. The base pool releases the\nslot itself, so the placeholder from _get_conns() is not counted.\nAfter each such failure the pool can open one connection more than\nmemcache_max_connections. The extra connection stays until the worker\nrestarts. On a SAIO, five bursts of concurrent requests during a\nmemcached outage left a proxy worker with 14 connections instead\nof 2.\n\nOnly get() knows if it took an item from the pool. get() now returns\nthe placeholder after every error from create(). _get_conns() passes\ngot_connection\u003dFalse and does not return a placeholder.\n\nCloses-Bug: #2167125\nChange-Id: Iec0c542aca465d9ccca7401393cd68902916396e\nSigned-off-by: Christian Schwede \u003ccschwede@mailbox.org\u003e\nCo-Authored-By: Claude Opus 5 \u003cnoreply@anthropic.com\u003e\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/c9ebead21d89b7ea5e759a4fc1cb583469428364"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/c9ebead21d89b7ea5e759a4fc1cb583469428364"}]},"branch":"refs/heads/master"},"96f4751e2838970768f894ab6881867119f16e90":{"kind":"REWORK","_number":2,"created":"2026-09-11 16:46:07.000000000","uploader":{"_account_id":6968,"name":"Christian Schwede","email":"cschwede@nvidia.com","username":"cschwede"},"ref":"refs/changes/86/1005286/2","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/86/1005286/2","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/86/1005286/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/86/1005286/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/86/1005286/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/86/1005286/2"}}},"commit":{"parents":[{"commit":"9318950da879bd33b3b5216d0d0cfed4dea45d9c","subject":"Merge \"replicator: Quarantine suffixes we cannot delete\"","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/9318950da879bd33b3b5216d0d0cfed4dea45d9c"}]}],"author":{"name":"Christian Schwede","email":"cschwede@mailbox.org","date":"2026-09-11 14:19:22.000000000","tz":120},"committer":{"name":"Christian Schwede","email":"cschwede@mailbox.org","date":"2026-09-11 16:46:00.000000000","tz":120},"subject":"memcached: do not grow the pool after a failed connect","message":"memcached: do not grow the pool after a failed connect\n\nThe pool marks a failed connection with a (None, None) placeholder.\nget() replaces the placeholder with a new connection from create().\nIf create() fails, the placeholder must return to the pool.\n\nget() returned the placeholder only after a MemcachePoolTimeout. 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