Cleanup zombie build processes
Created by: AdamSimpson
Detaching a boost process leaves behind zombie processes
Singularity builder.img:/root> ps auxf USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 34 0.0 0.0 18480 3480 pts/1 S 02:33 0:00 /bin/bash --norc root 36 0.0 0.0 38976 3080 pts/1 R+ 02:33 0:00 _ ps auxf root 1 0.0 0.0 13968 1800 ? Ss 02:24 0:00 singularity-instance: root [builder] root 3 0.0 0.1 40192 6748 ? S 02:24 0:00 /usr/local/bin/ContainerBuilderServer root 4 0.0 0.0 0 0 ? Z 02:26 0:00 _ [action-suid] root 9 0.0 0.0 0 0 ? Z 02:26 0:00 _ [action-suid] root 14 0.0 0.0 0 0 ? Z 02:26 0:00 _ [action-suid] root 19 0.0 0.0 0 0 ? Z 02:26 0:00 _ [action-suid] root 24 0.0 0.0 0 0 ? Z 02:29 0:00 _ [action-suid] root 29 0.0 0.0 0 0 ? Z 02:31 0:00 _ [action-suid]