18842: Clean up keep cache set() a little bit

[arvados.git] / sdk / python / arvados / diskcache.py

diff --git a/sdk/python/arvados/diskcache.py b/sdk/python/arvados/diskcache.py
index 74b2a77b28506b2b5fd15b64b7977d877ea0ace8..f3984bbca493237a868d4c705a710be899fda637 100644 (file)
--- a/sdk/python/arvados/diskcache.py
+++ b/sdk/python/arvados/diskcache.py
@@ -66,6 +66,8 @@ class DiskCacheSlot(object):
             tmpfile = None
 
             self.content = mmap.mmap(self.filehandle.fileno(), 0, access=mmap.ACCESS_READ)
+            # only set the event when mmap is successful
+            self.ready.set()
         finally:
             if tmpfile is not None:
                 # If the tempfile hasn't been renamed on disk yet, try to delete it.