0xtyls

"Of note, createLink actually creates a hard link, not a symbolic one." Yes, it's a hard link, my mistake. "Just to be clear, you're ending up with an ExecDirException in...

"Does it recur if you run the three machines with a single worker only?" Yes. I use only one machine with a single worker this time, and it recurs. I...

Thanks for your reply. By adding "frame-pointer" in the feature list, the profile is generated. But the graph does not show anything useful. See the graph below.