`docker build` hangs, com.docker.hyperkit using ~200% CPU

Docker Desktop
1

Expected behavior

docker build works normally

Actual behavior

docker build hangs on a seemingly innocuous step, then com.docker.hyperkit starts using max CPU. Even after killing the build, com.docker.hyperkit continues to eat CPU cycles.

Information

Diagnostic ID 4F8D08FD-BED4-43E5-9FEB-4BA26C287886

Docker for Mac: version: mac-v1.12.0-beta16.2
OS X: version 10.11.5 (build: 15F34)
logs: /tmp/20160620-171832.tar.gz
failure: No error was detected
[OK] docker-cli
[OK] app
[OK] menubar
[OK] virtualization
[OK] system
[OK] osxfs
[OK] db
[OK] slirp
[OK] moby-console
[OK] logs
[OK] vmnetd
[OK] env
[OK] moby
[OK] driver.amd64-linux

2 Likes
2

Same issue here. What does your step do? I have the same behavior while executing “run” step with “webpack” TypeScript to JavaScript code compiling.

4

Me (and several colleagues) experience the same issue. During docker build, the process sometimes hangs and com.docker.hyperkit occupies 200% CPU for several minutes untill it recovers and the process continues. I created a pastebin with a process sample of a hanging process: http://pastebin.com/bpcDfu6s