I'm trying to debug why our integration tests are taking so long and it looks like they're hanging part way through.
I logged onto our test service and saw the following behaviour:
root@colossus:~# strace -p 18310 Process 18310 attached - interrupt to quit futex(0x7f9915c609d0, FUTEX_WAIT, 18313, NULL^C <unfinished ...> Process 18310 detached root@colossus:~# strace -p 18313 Process 18313 attached - interrupt to quit restart_syscall(<... resuming interrupted call ...>^C <unfinished ...> Process 18313 detached root@colossus:~# ps -ef | grep 18313 root 19089 19034 0 09:46 pts/0 00:00:00 grep --color=auto 18313 root@colossus:~# ps -p 18313 PID TTY TIME CMD
My interpretation of these commands is that
18310 is waiting for its child
18313 to complete.
18313 is trying to restart an interrupted system call.
Here's where it gets weird. Although I can attach to
18313, I cannot see it in the list of current processes, when I run
Can someone help me understand what is going on here, please?