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fix: memory leak when publishing messages #406

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plamut merged 3 commits into from
May 6, 2021
Merged

fix: memory leak when publishing messages #406

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bfcf972
fix: publisher memory leak
plamut Apr 30, 2021
fa77766
Add additional link for the fix context
plamut Apr 30, 2021
8ac087c
fix a typo
plamut Apr 30, 2021
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6 changes: 4 additions & 2 deletions google/cloud/pubsub_v1/publisher/_batch/thread.py
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Original file line number Diff line number Diff line change
Expand Up @@ -207,9 +207,11 @@ def commit(self):

def _start_commit_thread(self):
"""Start a new thread to actually handle the commit."""

# NOTE: If the thread is *not* a daemon, a memory leak exists due to a CPython issue.
# https://github.com/googleapis/python-pubsub/issues/395#issuecomment-829910303
# https://github.com/googleapis/python-pubsub/issues/395#issuecomment-830092418
commit_thread = threading.Thread(
name="Thread-CommitBatchPublisher", target=self._commit
name="Thread-CommitBatchPublisher", target=self._commit, daemon=True
)
commit_thread.start()

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7 changes: 6 additions & 1 deletion google/cloud/pubsub_v1/publisher/client.py
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Expand Up @@ -375,8 +375,13 @@ def _ensure_commit_timer_runs_no_lock(self):

def _start_commit_thread(self):
"""Start a new thread to actually wait and commit the sequencers."""
# NOTE: If the thread is *not* a daemon, a memory leak exists due to a CPython issue.
# https://github.com/googleapis/python-pubsub/issues/395#issuecomment-829910303
# https://github.com/googleapis/python-pubsub/issues/395#issuecomment-830092418
self._commit_thread = threading.Thread(
name="Thread-PubSubBatchCommitter", target=self._wait_and_commit_sequencers
name="Thread-PubSubBatchCommitter",
target=self._wait_and_commit_sequencers,
daemon=True,
)
self._commit_thread.start()

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