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Fix stale nginx upstream keepalive connections causing broken pipe errors #674

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Merged
stephanme merged 2 commits into from
Jul 30, 2026
+6 −0
Merged

Fix stale nginx upstream keepalive connections causing broken pipe errors #674

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2c90110
Fix stale nginx upstream keepalive connections causing broken pipe er…
WeiQuan0605 Jul 22, 2026
a94d18c
Calculate nginx upstream keepalive pool size from Puma config
WeiQuan0605 Jul 23, 2026
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4 changes: 4 additions & 0 deletions jobs/cloud_controller_ng/spec
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Expand Up @@ -1022,6 +1022,10 @@ properties:
description: "Configure keep alive timeout for connections to cloud controller. This is a temporary field used for testing."
default: 100

cc.nginx_upstream_keepalive_timeout:
description: "Keepalive timeout in seconds for nginx upstream connections to Puma. Must be less than cc.puma.persistent_timeout (default 20s) to prevent stale keepalive connections causing broken pipe errors."
default: 15

cc.jobs.local.number_of_workers:
default: 2
description: "Number of local cloud_controller_worker workers"
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2 changes: 2 additions & 0 deletions jobs/cloud_controller_ng/templates/nginx.conf.erb
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Expand Up @@ -50,6 +50,8 @@ limit_req_zone $http_authorization zone=<%= zone['name'] %>:10m rate=<%= zone['l

upstream cloud_controller {
server unix:/var/vcap/data/cloud_controller_ng/cloud_controller.sock;
keepalive <%= p("cc.puma.workers") * p("cc.puma.max_threads") %>;
keepalive_timeout <%= p("cc.nginx_upstream_keepalive_timeout") %>s;
}

upstream cloud_controller_metrics {
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