added explanation for extra sleeping in while loop

2011-03-30 23:15:37 -06:00 · 2011-03-30 23:15:37 -06:00 · 3e6018aa45
parent 16bfca3bd5
commit 3e6018aa45
1 changed files with 4 additions and 0 deletions
--- a/bin/slave.py
+++ b/bin/slave.py
@ -63,5 +63,9 @@ if __name__ == '__main__':

  shutdown = False
  while not shutdown:
+    # this sleep prevents a race condition in work(): someone putting
+    # themselves in as ready, pulling someone elses's shutdown signal, then
+    # putting their name in again.
    time.sleep(5)
+
    shutdown = work(inq, outq, g, myname)