simple-test on cheshire-cat silently fails

b'[2020-05-21 23:41:34,628] - [rest_client:943] ERROR - socket error while connecting to http://127.0.0.1:9001/pools/default/buckets/default?basic_stats=true error [Errno 24] Too many open files '

b'[2020-05-21 23:41:37,631] - [rest_client:943] ERROR - socket error while connecting to http://127.0.0.1:9001/pools/default/buckets/default?basic_stats=true error [Errno 24] Too many open files '

b'[2020-05-21 23:41:40,632] - [rest_client:943] ERROR - socket error while connecting to http://127.0.0.1:9001/pools/default/buckets/default?basic_stats=true error [Errno 24] Too many open files '

b'[2020-05-21 23:43:34,758] - [rest_client:945] ERROR - Tried ta connect 41 times'

b'[2020-05-21 23:43:34,759] - [data_helper:863] WARNING - unable to establish connection to 127.0.0.1. cleanup open connections'

b'[2020-05-21 23:43:34,759] - [task:375] ERROR - Unexpected error: unable to reach the host @ 127.0.0.1'

b'[2020-05-21 23:43:34,760] - [task:376] WARNING - vbucket map not ready after try 5'

ERROR======================================================================

ERROR: suite_tearDown (xdcr.uniXDCR.unidirectional)

----------------------------------------------------------------------

Traceback (most recent call last):

  File "lib/membase/api/rest_client.py", line 913, in _http_request

    params, headers)

  File "lib/membase/api/httplib2/__init__.py", line 1953, in request

  File "lib/membase/api/httplib2/__init__.py", line 1618, in _request

  File "lib/membase/api/httplib2/__init__.py", line 1524, in _conn_request

  File "lib/membase/api/httplib2/__init__.py", line 1220, in connect

  File "lib/membase/api/httplib2/__init__.py", line 1170, in connect

  File "/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/socket.py", line 151, in __init__

OSError: [Errno 24] Too many open filesDuring handling of the above exception, another exception occurred:Traceback (most recent call last):

  File "pytests/xdcr/uniXDCR.py", line 18, in setUp

    super(unidirectional, self).setUp()

  File "pytests/xdcr/xdcrnewbasetests.py", line 2653, in setUp

    self.__setup_for_test()

  File "pytests/xdcr/xdcrnewbasetests.py", line 2768, in __setup_for_test

    self.__create_buckets()

  File "pytests/xdcr/xdcrnewbasetests.py", line 3015, in __create_buckets

    maxttl=maxttl)

  File "pytests/xdcr/xdcrnewbasetests.py", line 1435, in create_default_bucket

    self.__clusterop.create_default_bucket(bucket_params)

  File "lib/couchbase_helper/cluster.py", line 308, in create_default_bucket

  File "lib/tasks/future.py", line 160, in result

  File "lib/tasks/future.py", line 112, in __get_result

  File "lib/tasks/task.py", line 363, in check

    if BucketOperationHelper.wait_for_memcached(self.server, self.bucket, self.alt_addr):

  File "lib/membase/helper/bucket_helper.py", line 344, in wait_for_memcached

  File "lib/membase/helper/bucket_helper.py", line 268, in wait_for_vbuckets_ready_state

  File "lib/memcached/helper/data_helper.py", line 774, in __init__

  File "lib/memcached/helper/data_helper.py", line 780, in reset

  File "lib/memcached/helper/data_helper.py", line 836, in request_map

  File "lib/memcached/helper/data_helper.py", line 865, in add_memcached

  File "lib/memcached/helper/data_helper.py", line 858, in add_memcached

  File "lib/memcached/helper/data_helper.py", line 315, in direct_client

  File "lib/membase/api/rest_client.py", line 2444, in get_bucket

    status, content, header = self._http_request(api)

  File "lib/membase/api/rest_client.py", line 946, in _http_request

    raise ServerUnavailableException(ip=self.ip)

membase.api.exception.ServerUnavailableException: unable to reach the host @ 127.0.0.1----------------------------------------------------------------------

Ran 1 test in 156.683sFAILED (errors=1)

b'[<FrameSummary file /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/threading.py, line 890 in _bootstrap>, <FrameSummary file /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/threading.py, line 926 in _bootstrap_inner>, <FrameSummary file lib/tasks/taskmanager.py, line 31 in run>, <FrameSummary file lib/tasks/task.py, line 95 in step>, <FrameSummary file lib/tasks/task.py, line 379 in check>, <FrameSummary file lib/tasks/future.py, line 265 in set_exception>]'

b'Thu May 21 23:43:34 2020'

b'[<FrameSummary file testrunner.py, line 1029 in <module>>, <FrameSummary file testrunner.py, line 1012 in watcher>, <FrameSummary file testrunner.py, line 984 in main>, <FrameSummary file testrunner.py, line 756 in runtests>, <FrameSummary file /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/unittest/runner.py, line 176 in run>, <FrameSummary file /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/unittest/suite.py, line 84 in __call__>, <FrameSummary file /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/unittest/suite.py, line 122 in run>, <FrameSummary file /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/unittest/case.py, line 676 in __call__>, <FrameSummary file /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/unittest/case.py, line 624 in run>, <FrameSummary file pytests/xdcr/uniXDCR.py, line 18 in setUp>, <FrameSummary file pytests/xdcr/xdcrnewbasetests.py, line 2653 in setUp>, <FrameSummary file pytests/xdcr/xdcrnewbasetests.py, line 2768 in __setup_for_test>, <FrameSummary file pytests/xdcr/xdcrnewbasetests.py, line 3015 in __create_buckets>, <FrameSummary file pytests/xdcr/xdcrnewbasetests.py, line 1435 in create_default_bucket>, <FrameSummary file lib/couchbase_helper/cluster.py, line 308 in create_default_bucket>, <FrameSummary file lib/tasks/future.py, line 160 in result>, <FrameSummary file lib/tasks/future.py, line 111 in __get_result>]'

b"('rebalance.rebalancein.RebalanceInTests.rebalance_in_with_ops', ' pass')"

b"('rebalance.rebalancein.RebalanceInTests.rebalance_in_with_ops', ' pass')"

b"('memcapable.WarmUpMemcachedTest.do_warmup_100k', ' pass')"

b"('view.createdeleteview.CreateDeleteViewTests.test_view_ops', ' pass')"

b"('view.viewquerytests.ViewQueryTests.test_employee_dataset_startkey_endkey_queries_rebalance_in', ' pass')"

b"('view.viewquerytests.ViewQueryTests.test_simple_dataset_stale_queries_data_modification', ' pass')"

b"('xdcr.uniXDCR.unidirectional.load_with_ops', ' pass')"

b"('xdcr.uniXDCR.unidirectional.load_with_failover', ' pass')"

b'During the test, Remote Connections: 0, Disconnections: 236'

b"('Thread', <TaskManager(Cluster_Thread, started 123145513283584)>, 'was not properly terminated, will be terminated now.')"

b'Shutting down the thread...'

b"('Thread', <TaskManager(Cluster_Thread, started 123145518538752)>, 'was not properly terminated, will be terminated now.')"

b'Shutting down the thread...'

b"('Thread', <TaskManager(Cluster_Thread, started 123145523793920)>, 'was not properly terminated, will be terminated now.')"

b'Shutting down the thread...'

b'*** TestRunner ***'

INFO:root:stopping node 0

INFO:root:stopping node 1

INFO:root:stopping node 2

INFO:root:stopping node 3

$ echo $?

0