1 files changed, 4 insertions, 0 deletions

diff --git a/meta/lib/oe/utils.py b/meta/lib/oe/utils.py
index 0c1d48a209..3a496090f3 100644
--- a/meta/lib/oe/utils.py
+++ b/meta/lib/oe/utils.py
@@ -307,6 +307,10 @@ def multiprocess_launch(target, items, d, extraargs=None):
             p.start()
             launched.append(p)
         for q in launched:
+            # Have to manually call update() to avoid deadlocks. The pipe can be full and
+            # transfer stalled until we try and read the results object but the subprocess won't exit
+            # as it still has data to write (https://bugs.python.org/issue8426)
+            q.update()
             # The finished processes are joined when calling is_alive()
             if not q.is_alive():
                 if q.exception: