SERVER-40514 Fix race in Resmoke

1 files changed, 4 insertions, 1 deletions

diff --git a/buildscripts/resmokelib/logging/handlers.py b/buildscripts/resmokelib/logging/handlers.py
index fecbde906fa..7a00dcac988 100644
--- a/buildscripts/resmokelib/logging/handlers.py
+++ b/buildscripts/resmokelib/logging/handlers.py
@@ -58,6 +58,7 @@ class BufferedHandler(logging.Handler):
         self.__emit_buffer = []
         self.__flush_event = None  # A handle to the event that calls self.flush().
         self.__flush_scheduled_by_emit = False
+        self.__close_called = False
 
         self.__flush_lock = threading.Lock()  # Serializes callers of self.flush().
 
@@ -119,7 +120,7 @@ class BufferedHandler(logging.Handler):
         self.__flush(close_called=False)
 
         with self.__emit_lock:
-            if self.__flush_event is not None:
+            if self.__flush_event is not None and not self.__close_called:
                 # We cancel 'self.__flush_event' in case flush() was called by someone other than
                 # the flush thread to avoid having multiple flush() events scheduled.
                 flush.cancel(self.__flush_event)
@@ -149,6 +150,8 @@ class BufferedHandler(logging.Handler):
         """Flush the buffer and tidies up any resources used by this handler."""
 
         with self.__emit_lock:
+            self.__close_called = True
+
             if self.__flush_event is not None:
                 flush.cancel(self.__flush_event)