Avoid spurious exceptions for now

worker.py

@@ -207,8 +207,9 @@ def run_jobs(r, rev, jobs):
         else:
             print 'Got two responses for %d' % sidx
         if retry and retry[0] < sidx - 2 * QUEUE_LENGTH:
-            # TODO: better exception
-            raise ValueError("Double retry!")
+            # TODO: ensure that this doesn't happen accidentally; raise an
+            # appropriate exception when it does
+            print "Double retry!"
         expired, waiting[:] = partition(lambda w: w < sidx - QUEUE_LENGTH,
                                         waiting)
         for i in expired: