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[Doc] add comment for waiting for Ray to shutdown in test_client_reconnect.py (#21672)

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mwtian 2022-01-18 12:06:08 -08:00 • committed by GitHub
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6
python/ray/tests/test_client_reconnect.py
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@ -268,6 +268,12 @@ def start_middleman_server(on_log_response=None,
ray.util.disconnect()
if middleman:
middleman.stop(0)
# Delete server to allow the client server to be GC'ed, which shuts
# down Ray. Then wait for Ray to shut down in the local process.
# Otherwise, the Ray cluster may stay alive until the next call to
# start_middleman_server(), become the backing Ray cluster to the
# client server, and shut down in the middle of the test case after
# GC finally catches up, leading to test failures.
server.stop(0)
del server
start = time.monotonic()