diff options
| -rw-r--r-- | Doc/library/multiprocessing.rst | 4 | ||||
| -rw-r--r-- | Misc/NEWS | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst index 4f3f1cd..d611278 100644 --- a/Doc/library/multiprocessing.rst +++ b/Doc/library/multiprocessing.rst @@ -120,7 +120,9 @@ processes: print(q.get()) # prints "[42, None, 'hello']" p.join() - Queues are thread and process safe. + Queues are thread and process safe, but note that they must never + be instantiated as a side effect of importing a module: this can lead + to a deadlock! (see :ref:`threaded-imports`) **Pipes** @@ -2879,6 +2879,9 @@ Build Documentation ------------- +- Issue #7707: Document that ``multiprocessing.Queue`` operations during import + can lead to deadlocks. + - Issue #9817: Add expat COPYING file; add expat, libffi and expat licenses to Doc/license.rst. |