Right now it is possible to get the following error:
Having 20 errors! 0 tests passed. 0 tests skipped. 57.37 s elapsed (MainProcess).
Won't run stateful tests because test data wasn't loaded.
Traceback (most recent call last):
File "/usr/lib/python3.9/multiprocessing/managers.py", line 802, in _callmethod
conn = self._tls.connection
AttributeError: 'ForkAwareLocal' object has no attribute 'connection'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/ch/clickhouse/.cmake/../tests/clickhouse-test", line 1462, in <module>
main(args)
File "/src/ch/clickhouse/.cmake/../tests/clickhouse-test", line 1261, in main
if len(restarted_tests) > 0:
File "<string>", line 2, in __len__
File "/usr/lib/python3.9/multiprocessing/managers.py", line 806, in _callmethod
self._connect()
File "/usr/lib/python3.9/multiprocessing/managers.py", line 793, in _connect
conn = self._Client(self._token.address, authkey=self._authkey)
File "/usr/lib/python3.9/multiprocessing/connection.py", line 507, in Client
c = SocketClient(address)
File "/usr/lib/python3.9/multiprocessing/connection.py", line 635, in SocketClient
s.connect(address)
ConnectionRefusedError: [Errno 111] Connection refused
The reason behind this is that manager's thread got terminated:
ipdb> p restarted_tests._manager._process
<ForkProcess name='SyncManager-1' pid=25125 parent=24939 stopped exitcode=-SIGTERM>
Refs: #29259 (cc: @vdimir)
Follow-up for: #29197 (cc: @tavplubix)
Variables aren't shared when using multiprocessing, use shared memory
instead
https://docs.python.org/3/library/multiprocessing.html#shared-ctypes-objects.
There appears to be a deadlock when multiple threads try to send
sigterm signal at the same time. Avoid it by making sure sigterm is sent
only once for the process group.
Replacing stderr by default does not makes a lot of sense, since it does
not compared with .reference anyway. From the other hand it may confuse
the reader (seeing "default" instead of real database name in the test
logs).
P.S. I guess some tests may relay on this, let's see.
