add comment for serializing remoteCommand

buildbot · Dec 14, 2014 · ff1eef7 · ff1eef7
1 parent 65832db
commit ff1eef7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/master/buildbot/process/remotecommand.py b/master/buildbot/process/remotecommand.py
@@ -64,6 +64,9 @@ def __init__(self, remote_command, args, ignore_updates=False,
         self.builder_name = None
         self.commandID = None
         self.deferred = None
+        # a lock to make sure that only one log-handling method runs at a time.
+        # This is really only a problem with old-style steps, which do not
+        # wait for the Deferred from one method before invoking the next.
         self.loglock = defer.DeferredLock()
 
     def __repr__(self):