bvandeusenandClaude Opus 5.5
b6c4ce510d
#5760 "One stalled NFS mount freezes the whole agent: statvfs has no deadline, so the host goes silent while it still answers ping". The agent read every mount inline in its only loop; a hard-mounted share whose server stops blocks statvfs in the kernel with no timeout. Each mount is now read in a daemon thread under one 5 s deadline. One that misses it is sent as stalled, and isn't probed again while its last probe is still blocked. A mount that errors (a stale handle) is left out instead of emptying the list. Steward counts them as mounts_stalled (alertable: "an NFS share stopped"), and skips the fullest-disk figure when every mount stalled. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>