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High io load (read)
Running hc v1.2.1
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This is probably happening in response to high memory usage on the host by other processes. My code doesn't touch the filesystem, it only communicates with another service over websocket.
I let iotop run for a while in (a)ccumulator mode and got those figures:
# lsof -p 13867
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
hkbridge 13867 root cwd DIR 179,1 4096 152940 /data
hkbridge 13867 root rtd DIR 0,51 4096 129335 /
hkbridge 13867 root txt REG 0,51 10094701 152913 /hkbridge
hkbridge 13867 root mem REG 179,1 152913 /hkbridge (stat: No such file or directory)
hkbridge 13867 root 0u CHR 1,3 0t0 745146 /dev/null
hkbridge 13867 root 1w FIFO 0,11 0t0 745094 pipe
hkbridge 13867 root 2w FIFO 0,11 0t0 745095 pipe
hkbridge 13867 root 3u IPv4 745170 0t0 UDP *:mdns
hkbridge 13867 root 4u a_inode 0,12 0 8724 [eventpoll]
hkbridge 13867 root 5u IPv6 745172 0t0 UDP *:mdns
hkbridge 13867 root 7u IPv4 744386 0t0 UDP *:mdns
hkbridge 13867 root 8u IPv6 746880 0t0 TCP *:63531 (LISTEN)
hkbridge 13867 root 10u IPv6 744388 0t0 UDP *:mdns
hkbridge 13867 root 14u IPv4 868978 0t0 TCP localhost:35482->localhost:3000 (ESTABLISHED)
hkbridge 13867 root 15u IPv6 870928 0t0 TCP hubot:63531->192.168.18.30:62188 (ESTABLISHED)
Unfortunately the machine hang before I could inspect further.