VM log filled with error 55


  • The [~]/Library/Logs/Anka/{UUID}.log is filled with 22: failed to write packet, error 55 and failed to send # packets: error 55

Common Causes and solutions

  1. The send buffer is exceeding. Normally it shouldn’t be a critical error – packet loss is being handled by the TCP stack of guest. But if the error rate is very high, it definitely could be a symptom of network problems happening in guests. If the occurrence of these errors is more than just a few log entries (10s every millisecond for example), you need to increase the values of sysctl net.local.dgram.maxdgram and sysctl net.local.dgram.recvspace on the host (with no VMs running) and then run sudo launchctl unload -w Library/LaunchDaemons/com.veertu.anka.ankanetd.plist; sudo launchctl load -w Library/LaunchDaemons/com.veertu.anka.ankanetd.plist.
Manually executed sysctl changes do not persist across reboots.

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