args = ('forward', 'rel:rev,rev:rev', 2, None), kwargs = {} handler = <swh.graph.backend.JavaStreamProxy._HandlerWrapper object at 0x7fe554af76d8> reader = <async_generator object JavaStreamProxy.read_node_ids at 0x7fe554af2400> java_task = <Task finished coro=<JavaStreamProxy._HandlerWrapper.__getattr__.<locals>.java_call() done, defined at /var/lib/jenkin...tat py4j.GatewayConnection.run(GatewayConnection.java:238)\n\tat java.base/java.lang.Thread.run(Thread.java:834)\n\n')> task_exc = Py4JError('An error occurred while calling o7.visit_nodes. Trace:\npy4j.Py4JException: Method visit_nodes([class java....\tat py4j.GatewayConnection.run(GatewayConnection.java:238)\n\tat java.base/java.lang.Thread.run(Thread.java:834)\n\n') async def java_call_iterator(*args, **kwargs): with self.get_handler() as (handler, reader): java_task = getattr(handler, name)(*args, **kwargs) try: > async for value in reader: .tox/py3/lib/python3.7/site-packages/swh/graph/backend.py:189: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <swh.graph.backend.JavaStreamProxy object at 0x7fe554b88860> fname = '/tmp/swh-graph-7d_4590t/swh-graph.fifo' async def read_node_ids(self, fname): loop = asyncio.get_event_loop() open_thread = loop.run_in_executor(None, open, fname, "rb") # Since the open() call on the FIFO is blocking until it is also opened # on the Java side, we await it with a timeout in case there is an # exception that prevents the write-side open(). > with (await asyncio.wait_for(open_thread, timeout=2)) as f: .tox/py3/lib/python3.7/site-packages/swh/graph/backend.py:150: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fut = <Future cancelled>, timeout = 2 async def wait_for(fut, timeout, *, loop=None): """Wait for the single Future or coroutine to complete, with timeout. Coroutine will be wrapped in Task. Returns result of the Future or coroutine. When a timeout occurs, it cancels the task and raises TimeoutError. To avoid the task cancellation, wrap it in shield(). If the wait is cancelled, the task is also cancelled. This function is a coroutine. """ if loop is None: loop = events.get_event_loop() if timeout is None: return await fut if timeout <= 0: fut = ensure_future(fut, loop=loop) if fut.done(): return fut.result() fut.cancel() raise futures.TimeoutError() waiter = loop.create_future() timeout_handle = loop.call_later(timeout, _release_waiter, waiter) cb = functools.partial(_release_waiter, waiter) fut = ensure_future(fut, loop=loop) fut.add_done_callback(cb) try: # wait until the future completes or the timeout try: await waiter except futures.CancelledError: fut.remove_done_callback(cb) fut.cancel() raise if fut.done(): return fut.result() else: fut.remove_done_callback(cb) # We must ensure that the task is not running # after wait_for() returns. # See https://bugs.python.org/issue32751 await _cancel_and_wait(fut, loop=loop) > raise futures.TimeoutError() E concurrent.futures._base.TimeoutError /usr/lib/python3.7/asyncio/tasks.py:423: TimeoutError During handling of the above exception, another exception occurred: graph = <swh.graph.graph.Graph object at 0x7fe554b88b70> def test_visit_nodes(graph): actual = list( graph["swh:1:rel:0000000000000000000000000000000000000010"].visit_nodes( > edges="rel:rev,rev:rev" ) ) .tox/py3/lib/python3.7/site-packages/swh/graph/tests/test_graph.py:56: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .tox/py3/lib/python3.7/site-packages/swh/graph/graph.py:88: in visit_nodes self.graph.backend.visit_nodes, direction, edges, self.id, max_edges .tox/py3/lib/python3.7/site-packages/swh/graph/graph.py:29: in call_async_gen res = loop.run_until_complete(it.__anext__()) /usr/lib/python3.7/asyncio/base_events.py:584: in run_until_complete return future.result() .tox/py3/lib/python3.7/site-packages/swh/graph/backend.py:97: in visit_nodes direction, edges_fmt, src, max_edges .tox/py3/lib/python3.7/site-packages/swh/graph/backend.py:198: in java_call_iterator raise task_exc .tox/py3/lib/python3.7/site-packages/swh/graph/backend.py:167: in java_call await loop.run_in_executor(None, lambda: func(*args, **kwargs)) /usr/lib/python3.7/concurrent/futures/thread.py:57: in run result = self.fn(*self.args, **self.kwargs) .tox/py3/lib/python3.7/site-packages/swh/graph/backend.py:167: in <lambda> await loop.run_in_executor(None, lambda: func(*args, **kwargs)) .tox/py3/lib/python3.7/site-packages/py4j/java_gateway.py:1310: in __call__ answer, self.gateway_client, self.target_id, self.name) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ answer = 'xspy4j.Py4JException: Method visit_nodes([class java.lang.String, class java.lang.String, class java.lang.Integer, nu...n\tat py4j.GatewayConnection.run(GatewayConnection.java:238)\\n\tat java.base/java.lang.Thread.run(Thread.java:834)\\n' gateway_client = <py4j.java_gateway.GatewayClient object at 0x7fe554b88b00> target_id = 'o7', name = 'visit_nodes' def get_return_value(answer, gateway_client, target_id=None, name=None): """Converts an answer received from the Java gateway into a Python object. For example, string representation of integers are converted to Python integer, string representation of objects are converted to JavaObject instances, etc. :param answer: the string returned by the Java gateway :param gateway_client: the gateway client used to communicate with the Java Gateway. Only necessary if the answer is a reference (e.g., object, list, map) :param target_id: the name of the object from which the answer comes from (e.g., *object1* in `object1.hello()`). Optional. :param name: the name of the member from which the answer comes from (e.g., *hello* in `object1.hello()`). Optional. """ if is_error(answer)[0]: if len(answer) > 1: type = answer[1] value = OUTPUT_CONVERTER[type](answer[2:], gateway_client) if answer[1] == REFERENCE_TYPE: raise Py4JJavaError( "An error occurred while calling {0}{1}{2}.\n". format(target_id, ".", name), value) else: raise Py4JError( "An error occurred while calling {0}{1}{2}. Trace:\n{3}\n". > format(target_id, ".", name, value)) E py4j.protocol.Py4JError: An error occurred while calling o7.visit_nodes. Trace: E py4j.Py4JException: Method visit_nodes([class java.lang.String, class java.lang.String, class java.lang.Integer, null]) does not exist E at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:318) E at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:326) E at py4j.Gateway.invoke(Gateway.java:274) E at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132) E at py4j.commands.CallCommand.execute(CallCommand.java:79) E at py4j.GatewayConnection.run(GatewayConnection.java:238) E at java.base/java.lang.Thread.run(Thread.java:834) .tox/py3/lib/python3.7/site-packages/py4j/protocol.py:332: Py4JError