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Posted to issues@flink.apache.org by "Dian Fu (Jira)" <ji...@apache.org> on 2019/11/26 02:07:00 UTC

[jira] [Updated] (FLINK-14944) Unstable test FlinkFnExecutionSyncTests.test_flink_fn_execution_pb2_synced

     [ https://issues.apache.org/jira/browse/FLINK-14944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dian Fu updated FLINK-14944:
----------------------------
    Description: 
This tests failed occasionally:
{code:java}
force = 'True', output_dir = '/tmp/tmpkh6rmeig'

    def generate_proto_files(force=True, output_dir=DEFAULT_PYTHON_OUTPUT_PATH):
        try:
            import grpc_tools  # noqa  # pylint: disable=unused-import
        except ImportError:
            warnings.warn('Installing grpcio-tools is recommended for development.')
    
        proto_dirs = [os.path.join(PYFLINK_ROOT_PATH, path) for path in PROTO_PATHS]
        proto_files = sum(
            [glob.glob(os.path.join(d, '*.proto')) for d in proto_dirs], [])
        out_dir = os.path.join(PYFLINK_ROOT_PATH, output_dir)
        out_files = [path for path in glob.glob(os.path.join(out_dir, '*_pb2.py'))]
    
        if out_files and not proto_files and not force:
            # We have out_files but no protos; assume they're up to date.
            # This is actually the common case (e.g. installation from an sdist).
            logging.info('No proto files; using existing generated files.')
            return
    
        elif not out_files and not proto_files:
            raise RuntimeError(
                'No proto files found in %s.' % proto_dirs)
    
        # Regenerate iff the proto files or this file are newer.
        elif force or not out_files or len(out_files) < len(proto_files) or (
                min(os.path.getmtime(path) for path in out_files)
                <= max(os.path.getmtime(path)
                       for path in proto_files + [os.path.realpath(__file__)])):
            try:
>               from grpc_tools import protoc
E               ModuleNotFoundError: No module named 'grpc_tools'

pyflink/gen_protos.py:70: ModuleNotFoundError

During handling of the above exception, another exception occurred:

self = <pyflink.fn_execution.tests.test_flink_fn_execution_pb2_synced.FlinkFnExecutionSyncTests testMethod=test_flink_fn_execution_pb2_synced>

    def test_flink_fn_execution_pb2_synced(self):
>       generate_proto_files('True', self.tempdir)

pyflink/fn_execution/tests/test_flink_fn_execution_pb2_synced.py:35: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pyflink/gen_protos.py:83: in generate_proto_files
    target=_install_grpcio_tools_and_generate_proto_files(force, output_dir))
pyflink/gen_protos.py:131: in _install_grpcio_tools_and_generate_proto_files
    '--upgrade', GRPC_TOOLS, "-I"])
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

popenargs = (['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', ...],)
kwargs = {}, retcode = 2
cmd = ['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', ...]

    def check_call(*popenargs, **kwargs):
        """Run command with arguments.  Wait for command to complete.  If
        the exit code was zero then return, otherwise raise
        CalledProcessError.  The CalledProcessError object will have the
        return code in the returncode attribute.
    
        The arguments are the same as for the call function.  Example:
    
        check_call(["ls", "-l"])
        """
        retcode = call(*popenargs, **kwargs)
        if retcode:
            cmd = kwargs.get("args")
            if cmd is None:
                cmd = popenargs[0]
>           raise CalledProcessError(retcode, cmd)
E           subprocess.CalledProcessError: Command '['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', '--build', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels-build', '--upgrade', 'grpcio-tools>=1.3.5,<=1.14.2', '-I']' returned non-zero exit status 2.

dev/.conda/envs/3.6/lib/python3.6/subprocess.py:311: CalledProcessError
---------------------------- Captured stdout setup -----------------------------
2019-11-25 14:25:21,766 - root - INFO - Using /home/travis/build/apache/flink/build-target as FLINK_HOME...
------------------------------ Captured log setup ------------------------------
INFO     root:test_case_utils.py:75 Using /home/travis/build/apache/flink/build-target as FLINK_HOME...
----------------------------- Captured stdout call -----------------------------
2019-11-25 14:25:21,768 - root - WARNING - Installing grpcio-tools into /home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels
Collecting grpcio-tools<=1.14.2,>=1.3.5
  Downloading https://files.pythonhosted.org/packages/df/a6/ec4baac1ab265857800cfdbd07a05db5fa5e159ee44fd41b358784527d94/grpcio_tools-1.14.2-cp36-cp36m-manylinux1_x86_64.whl (22.2MB)
----------------------------- Captured stderr call -----------------------------
Exception:
Traceback (most recent call last):
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 302, in _error_catcher
    yield
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 384, in read
    data = self._fp.read(amt)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/cachecontrol/filewrapper.py", line 60, in read
    data = self.__fp.read(amt)
  File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/http/client.py", line 459, in read
    n = self.readinto(b)
  File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/http/client.py", line 503, in readinto
    n = self.fp.readinto(b)
  File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/socket.py", line 586, in readinto
    return self._sock.recv_into(b)
  File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/ssl.py", line 1012, in recv_into
    return self.read(nbytes, buffer)
  File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/ssl.py", line 874, in read
    return self._sslobj.read(len, buffer)
  File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/ssl.py", line 631, in read
    v = self._sslobj.read(len, buffer)
ConnectionResetError: [Errno 104] Connection reset by peer

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/basecommand.py", line 228, in main
    status = self.run(options, args)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 291, in run
    resolver.resolve(requirement_set)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/resolve.py", line 103, in resolve
    self._resolve_one(requirement_set, req)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/resolve.py", line 257, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/resolve.py", line 210, in _get_abstract_dist_for
    self.require_hashes
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 310, in prepare_linked_requirement
    progress_bar=self.progress_bar
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 837, in unpack_url
    progress_bar=progress_bar
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 674, in unpack_http_url
    progress_bar)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 898, in _download_http_url
    _download_url(resp, link, content_file, hashes, progress_bar)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 618, in _download_url
    hashes.check_against_chunks(downloaded_chunks)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/utils/hashes.py", line 48, in check_against_chunks
    for chunk in chunks:
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 586, in written_chunks
    for chunk in chunks:
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/utils/ui.py", line 159, in iter
    for x in it:
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 575, in resp_read
    decode_content=False):
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 436, in stream
    data = self.read(amt=amt, decode_content=decode_content)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 401, in read
    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
  File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/contextlib.py", line 99, in __exit__
    self.gen.throw(type, value, traceback)
  File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 320, in _error_catcher
    raise ProtocolError('Connection broken: %r' % e, e)
pip._vendor.urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(104, 'Connection reset by peer')", ConnectionResetError(104, 'Connection reset by peer'))
You are using pip version 10.0.1, however version 19.3.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
{code}
instance: [https://api.travis-ci.org/v3/job/616685590/log.txt]

  was:
This tests failed occasionally:
{code:java}
force = 'True', output_dir = '/tmp/tmpkh6rmeig'

    def generate_proto_files(force=True, output_dir=DEFAULT_PYTHON_OUTPUT_PATH):
        try:
            import grpc_tools  # noqa  # pylint: disable=unused-import
        except ImportError:
            warnings.warn('Installing grpcio-tools is recommended for development.')
    
        proto_dirs = [os.path.join(PYFLINK_ROOT_PATH, path) for path in PROTO_PATHS]
        proto_files = sum(
            [glob.glob(os.path.join(d, '*.proto')) for d in proto_dirs], [])
        out_dir = os.path.join(PYFLINK_ROOT_PATH, output_dir)
        out_files = [path for path in glob.glob(os.path.join(out_dir, '*_pb2.py'))]
    
        if out_files and not proto_files and not force:
            # We have out_files but no protos; assume they're up to date.
            # This is actually the common case (e.g. installation from an sdist).
            logging.info('No proto files; using existing generated files.')
            return
    
        elif not out_files and not proto_files:
            raise RuntimeError(
                'No proto files found in %s.' % proto_dirs)
    
        # Regenerate iff the proto files or this file are newer.
        elif force or not out_files or len(out_files) < len(proto_files) or (
                min(os.path.getmtime(path) for path in out_files)
                <= max(os.path.getmtime(path)
                       for path in proto_files + [os.path.realpath(__file__)])):
            try:
>               from grpc_tools import protoc
E               ModuleNotFoundError: No module named 'grpc_tools'

pyflink/gen_protos.py:70: ModuleNotFoundError

During handling of the above exception, another exception occurred:

self = <pyflink.fn_execution.tests.test_flink_fn_execution_pb2_synced.FlinkFnExecutionSyncTests testMethod=test_flink_fn_execution_pb2_synced>

    def test_flink_fn_execution_pb2_synced(self):
>       generate_proto_files('True', self.tempdir)

pyflink/fn_execution/tests/test_flink_fn_execution_pb2_synced.py:35: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pyflink/gen_protos.py:83: in generate_proto_files
    target=_install_grpcio_tools_and_generate_proto_files(force, output_dir))
pyflink/gen_protos.py:131: in _install_grpcio_tools_and_generate_proto_files
    '--upgrade', GRPC_TOOLS, "-I"])
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

popenargs = (['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', ...],)
kwargs = {}, retcode = 2
cmd = ['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', ...]

    def check_call(*popenargs, **kwargs):
        """Run command with arguments.  Wait for command to complete.  If
        the exit code was zero then return, otherwise raise
        CalledProcessError.  The CalledProcessError object will have the
        return code in the returncode attribute.
    
        The arguments are the same as for the call function.  Example:
    
        check_call(["ls", "-l"])
        """
        retcode = call(*popenargs, **kwargs)
        if retcode:
            cmd = kwargs.get("args")
            if cmd is None:
                cmd = popenargs[0]
>           raise CalledProcessError(retcode, cmd)
E           subprocess.CalledProcessError: Command '['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', '--build', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels-build', '--upgrade', 'grpcio-tools>=1.3.5,<=1.14.2', '-I']' returned non-zero exit status 2.

dev/.conda/envs/3.6/lib/python3.6/subprocess.py:311: CalledProcessError
{code}

instance: [https://api.travis-ci.org/v3/job/616685590/log.txt]


> Unstable test FlinkFnExecutionSyncTests.test_flink_fn_execution_pb2_synced
> --------------------------------------------------------------------------
>
>                 Key: FLINK-14944
>                 URL: https://issues.apache.org/jira/browse/FLINK-14944
>             Project: Flink
>          Issue Type: Bug
>          Components: API / Python
>    Affects Versions: 1.10.0
>            Reporter: Dian Fu
>            Priority: Major
>             Fix For: 1.10.0
>
>
> This tests failed occasionally:
> {code:java}
> force = 'True', output_dir = '/tmp/tmpkh6rmeig'
>     def generate_proto_files(force=True, output_dir=DEFAULT_PYTHON_OUTPUT_PATH):
>         try:
>             import grpc_tools  # noqa  # pylint: disable=unused-import
>         except ImportError:
>             warnings.warn('Installing grpcio-tools is recommended for development.')
>     
>         proto_dirs = [os.path.join(PYFLINK_ROOT_PATH, path) for path in PROTO_PATHS]
>         proto_files = sum(
>             [glob.glob(os.path.join(d, '*.proto')) for d in proto_dirs], [])
>         out_dir = os.path.join(PYFLINK_ROOT_PATH, output_dir)
>         out_files = [path for path in glob.glob(os.path.join(out_dir, '*_pb2.py'))]
>     
>         if out_files and not proto_files and not force:
>             # We have out_files but no protos; assume they're up to date.
>             # This is actually the common case (e.g. installation from an sdist).
>             logging.info('No proto files; using existing generated files.')
>             return
>     
>         elif not out_files and not proto_files:
>             raise RuntimeError(
>                 'No proto files found in %s.' % proto_dirs)
>     
>         # Regenerate iff the proto files or this file are newer.
>         elif force or not out_files or len(out_files) < len(proto_files) or (
>                 min(os.path.getmtime(path) for path in out_files)
>                 <= max(os.path.getmtime(path)
>                        for path in proto_files + [os.path.realpath(__file__)])):
>             try:
> >               from grpc_tools import protoc
> E               ModuleNotFoundError: No module named 'grpc_tools'
> pyflink/gen_protos.py:70: ModuleNotFoundError
> During handling of the above exception, another exception occurred:
> self = <pyflink.fn_execution.tests.test_flink_fn_execution_pb2_synced.FlinkFnExecutionSyncTests testMethod=test_flink_fn_execution_pb2_synced>
>     def test_flink_fn_execution_pb2_synced(self):
> >       generate_proto_files('True', self.tempdir)
> pyflink/fn_execution/tests/test_flink_fn_execution_pb2_synced.py:35: 
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
> pyflink/gen_protos.py:83: in generate_proto_files
>     target=_install_grpcio_tools_and_generate_proto_files(force, output_dir))
> pyflink/gen_protos.py:131: in _install_grpcio_tools_and_generate_proto_files
>     '--upgrade', GRPC_TOOLS, "-I"])
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
> popenargs = (['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', ...],)
> kwargs = {}, retcode = 2
> cmd = ['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', ...]
>     def check_call(*popenargs, **kwargs):
>         """Run command with arguments.  Wait for command to complete.  If
>         the exit code was zero then return, otherwise raise
>         CalledProcessError.  The CalledProcessError object will have the
>         return code in the returncode attribute.
>     
>         The arguments are the same as for the call function.  Example:
>     
>         check_call(["ls", "-l"])
>         """
>         retcode = call(*popenargs, **kwargs)
>         if retcode:
>             cmd = kwargs.get("args")
>             if cmd is None:
>                 cmd = popenargs[0]
> >           raise CalledProcessError(retcode, cmd)
> E           subprocess.CalledProcessError: Command '['/home/travis/build/apache/flink/flink-python/.tox/py36/bin/python', '-m', 'pip', 'install', '--prefix', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels', '--build', '/home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels-build', '--upgrade', 'grpcio-tools>=1.3.5,<=1.14.2', '-I']' returned non-zero exit status 2.
> dev/.conda/envs/3.6/lib/python3.6/subprocess.py:311: CalledProcessError
> ---------------------------- Captured stdout setup -----------------------------
> 2019-11-25 14:25:21,766 - root - INFO - Using /home/travis/build/apache/flink/build-target as FLINK_HOME...
> ------------------------------ Captured log setup ------------------------------
> INFO     root:test_case_utils.py:75 Using /home/travis/build/apache/flink/build-target as FLINK_HOME...
> ----------------------------- Captured stdout call -----------------------------
> 2019-11-25 14:25:21,768 - root - WARNING - Installing grpcio-tools into /home/travis/build/apache/flink/flink-python/pyflink/../.eggs/grpcio-wheels
> Collecting grpcio-tools<=1.14.2,>=1.3.5
>   Downloading https://files.pythonhosted.org/packages/df/a6/ec4baac1ab265857800cfdbd07a05db5fa5e159ee44fd41b358784527d94/grpcio_tools-1.14.2-cp36-cp36m-manylinux1_x86_64.whl (22.2MB)
> ----------------------------- Captured stderr call -----------------------------
> Exception:
> Traceback (most recent call last):
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 302, in _error_catcher
>     yield
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 384, in read
>     data = self._fp.read(amt)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/cachecontrol/filewrapper.py", line 60, in read
>     data = self.__fp.read(amt)
>   File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/http/client.py", line 459, in read
>     n = self.readinto(b)
>   File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/http/client.py", line 503, in readinto
>     n = self.fp.readinto(b)
>   File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/socket.py", line 586, in readinto
>     return self._sock.recv_into(b)
>   File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/ssl.py", line 1012, in recv_into
>     return self.read(nbytes, buffer)
>   File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/ssl.py", line 874, in read
>     return self._sslobj.read(len, buffer)
>   File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/ssl.py", line 631, in read
>     v = self._sslobj.read(len, buffer)
> ConnectionResetError: [Errno 104] Connection reset by peer
> During handling of the above exception, another exception occurred:
> Traceback (most recent call last):
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/basecommand.py", line 228, in main
>     status = self.run(options, args)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 291, in run
>     resolver.resolve(requirement_set)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/resolve.py", line 103, in resolve
>     self._resolve_one(requirement_set, req)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/resolve.py", line 257, in _resolve_one
>     abstract_dist = self._get_abstract_dist_for(req_to_install)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/resolve.py", line 210, in _get_abstract_dist_for
>     self.require_hashes
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 310, in prepare_linked_requirement
>     progress_bar=self.progress_bar
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 837, in unpack_url
>     progress_bar=progress_bar
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 674, in unpack_http_url
>     progress_bar)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 898, in _download_http_url
>     _download_url(resp, link, content_file, hashes, progress_bar)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 618, in _download_url
>     hashes.check_against_chunks(downloaded_chunks)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/utils/hashes.py", line 48, in check_against_chunks
>     for chunk in chunks:
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 586, in written_chunks
>     for chunk in chunks:
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/utils/ui.py", line 159, in iter
>     for x in it:
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_internal/download.py", line 575, in resp_read
>     decode_content=False):
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 436, in stream
>     data = self.read(amt=amt, decode_content=decode_content)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 401, in read
>     raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
>   File "/home/travis/build/apache/flink/flink-python/dev/.conda/envs/3.6/lib/python3.6/contextlib.py", line 99, in __exit__
>     self.gen.throw(type, value, traceback)
>   File "/home/travis/build/apache/flink/flink-python/.tox/py36/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 320, in _error_catcher
>     raise ProtocolError('Connection broken: %r' % e, e)
> pip._vendor.urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(104, 'Connection reset by peer')", ConnectionResetError(104, 'Connection reset by peer'))
> You are using pip version 10.0.1, however version 19.3.1 is available.
> You should consider upgrading via the 'pip install --upgrade pip' command.
> {code}
> instance: [https://api.travis-ci.org/v3/job/616685590/log.txt]



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