AFW-140 — File-descriptor limit too low
Area: Install & collector boot · All support codes · Reference table
Why this happened
The host's open-files limit (ulimit -n) is below what the collector needs under load; connections will fail with 502s well before CPU runs out.
Fix
Raise the limit to 65536 for the collector service (docker compose: ulimits: nofile: 65536; systemd: LimitNOFILE=65536), then restart the collector.
If the fix doesn't resolve it, file a support ticket from the console — your workspace's diagnostics snapshot is attached automatically, so this code reaches support with its context.