self = <test_registrar.Test testMethod=test_rotating_file>

    def test_rotating_file(self):
        """
        Checks that the registry is properly updated after a file is rotated
        """
        self.render_config_template(
            path=os.path.abspath(self.working_dir) + "/log/*",
            close_inactive="1s"
        )
    
        os.mkdir(self.working_dir + "/log/")
        testfile_path = self.working_dir + "/log/test.log"
    
        filebeat = self.start_beat()
    
        with open(testfile_path, 'w') as testfile:
            testfile.write("offset 9\n")
    
        self.wait_until(lambda: self.output_has(lines=1),
                        max_timeout=10)
    
        testfilerenamed = self.working_dir + "/log/test.1.log"
        os.rename(testfile_path, testfilerenamed)
    
        with open(testfile_path, 'w') as testfile:
            testfile.write("offset 10\n")
    
        self.wait_until(lambda: self.output_has(lines=2),
                        max_timeout=10)
    
        # Wait until rotation is detected
        self.wait_until(
            lambda: self.log_contains(
                "Updating state for renamed file"),
>           max_timeout=10)

tests/system/test_registrar.py:311: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <test_registrar.Test testMethod=test_rotating_file>
cond = <function Test.test_rotating_file.<locals>.<lambda> at 0x10e648ef0>
max_timeout = 10, poll_interval = 0.1, name = 'cond'

    def wait_until(self, cond, max_timeout=10, poll_interval=0.1, name="cond"):
        """
        Waits until the cond function returns true,
        or until the max_timeout is reached. Calls the cond
        function every poll_interval seconds.
    
        If the max_timeout is reached before cond() returns
        true, an exception is raised.
        """
        start = datetime.now()
        while not cond():
            if datetime.now() - start > timedelta(seconds=max_timeout):
                raise TimeoutError("Timeout waiting for '{}' to be true. ".format(name) +
>                                  "Waited {} seconds.".format(max_timeout))
E               beat.beat.TimeoutError: Timeout waiting for 'cond' to be true. Waited 10 seconds.

../libbeat/tests/system/beat/beat.py:363: TimeoutError