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______________ TestPantsDaemonIntegration.test_pantsd_pid_change _______________
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self = <pants_test.pantsd.pantsd_integration_test.TestPantsDaemonIntegration testMethod=test_pantsd_pid_change>
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    def test_pantsd_pid_change(self):
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        with self.pantsd_successful_run_context() as ctx:
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            ctx.runner(["help"])
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            ctx.checker.assert_started()
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            # Let any fs events quiesce.
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            time.sleep(10)
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            ctx.checker.assert_running()
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            subprocess_dir = ctx.pantsd_config["GLOBAL"]["pants_subprocessdir"]
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            (pidpath,) = glob.glob(os.path.join(subprocess_dir, "*", "pantsd", "pid"))
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            with open(pidpath, "w") as f:
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                f.write("9")
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            ctx.checker.assert_stopped()
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            # Remove the pidfile so that the teardown script doesn't try to kill process 9.
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>           os.unlink(pidpath)
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E           FileNotFoundError: [Errno 2] No such file or directory: '/tmp/process-execution5CdW9i/tmpq4xsfk3c/.pids/fd34f8cb7aab/pantsd/pid'
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tests/python/pants_test/pantsd/pantsd_integration_test.py:416: FileNotFoundError
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----------------------------- Captured stdout call -----------------------------
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pantsd log is /tmp/process-execution5CdW9i/tmpq4xsfk3c/.workdir.pants.d/pantsd/pantsd.log
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>>> config: 
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{'GLOBAL': {'pantsd': True, 'level': 'info', 'pants_subprocessdir': '/tmp/process-execution5CdW9i/tmpq4xsfk3c/.pids', 'backend_packages': ['pants.backend.python', 'pants.backend.python.lint.flake8']}}
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running: ./pants help (config={'GLOBAL': {'pantsd': True, 'level': 'info', 'pants_subprocessdir': '/tmp/process-execution5CdW9i/tmpq4xsfk3c/.pids', 'backend_packages': ['pants.backend.python', 'pants.backend.python.lint.flake8']}}) (extra_env=None)
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completed in 4.291295528411865 seconds
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PantsDaemonMonitor: pid is 8192 is_alive=True
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PantsDaemonMonitor: pid is 8192 is_alive=True
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PantsDaemonMonitor: pid is None is_alive=False
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===============================================================
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- BEGIN pants.log ---------------------------------------------
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===============================================================
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07:09:39.79 [INFO] handling request: `--no-pantsrc --pants-workdir=/tmp/process-execution5CdW9i/tmpq4xsfk3c/.workdir.pants.d --print-stacktrace=True --pants-config-files=[] --pants-config-files=/tmp/process-execution5CdW9i/tmpq4xsfk3c/.workdir.pants.d/pants.toml help`
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07:09:40.34 [INFO] request completed: `--no-pantsrc --pants-workdir=/tmp/process-execution5CdW9i/tmpq4xsfk3c/.workdir.pants.d --print-stacktrace=True --pants-config-files=[] --pants-config-files=/tmp/process-execution5CdW9i/tmpq4xsfk3c/.workdir.pants.d/pants.toml help`
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Error: 0.63 [ERROR] The scheduler was invalidated: Exception('Another instance of pantsd is running at 9')
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Error: 0.79 [ERROR] service failure for <pants.pantsd.service.scheduler_service.SchedulerService object at 0x7f2d980b4e90>.
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07:09:50.79 [INFO] Waiting for ongoing runs to complete before exiting...
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07:09:50.79 [INFO] Server exiting with Ok(())
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07:09:50.79 [INFO] Waiting for Sessions to complete before exiting...
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07:09:50.79 [INFO] Waiting for shutdown of: ["scheduler_service_session", "store_gc_service_session"]
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07:09:50.79 [INFO] Shutdown completed: "scheduler_service_session"
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07:09:50.79 [INFO] Shutdown completed: "store_gc_service_session"
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07:09:50.79 [INFO] Exiting pantsd
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07:09:50.79 [WARN] File watcher exiting with: The watcher was shut down.
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07:09:50.82 [WARN] File watcher exiting with: The watcher was shut down.
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===============================================================
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- END pants.log -----------------------------------------------
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===============================================================
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- generated xml file: /tmp/process-execution5CdW9i/tests.python.pants_test.pantsd.pantsd_integration_test.py.pantsd_integration.xml -
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=========================== short test summary info ============================
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FAILED tests/python/pants_test/pantsd/pantsd_integration_test.py::TestPantsDaemonIntegration::test_pantsd_pid_change
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============= 1 failed, 23 passed, 3 skipped in 248.53s (0:04:08) ==============