[Py4j-users] Gateway does not shut down properly?

[Alex G. <ale...@ne...>]

The following code:

import logging

from py4j.java_gatewayimport launch_gateway, JavaGateway, GatewayParameters


logging.basicConfig(level=logging.DEBUG)
port = launch_gateway()
params = GatewayParameters(port=port,eager_load=True)
gw = JavaGateway(gateway_parameters=params)
gw.shutdown()

Produces the following:

DEBUG:py4j.java_gateway:Exception while shutting down a socket

Traceback (most recent call last):

   File "/home/alex/virtualenv/asphalt/lib/python3.4/site-packages/py4j/java_gateway.py", line 301, in quiet_shutdown

     socket_instance.shutdown(socket.SHUT_RDWR)

OSError: [Errno 9] Bad file descriptor

INFO:py4j.java_gateway:Exception while shutting down callback server

Traceback (most recent call last):

   File "/home/alex/virtualenv/asphalt/lib/python3.4/site-packages/py4j/java_gateway.py", line 1428, in shutdown_callback_server

     self._callback_server.shutdown()

AttributeError: 'NoneType' object has no attribute 'shutdown'

DEBUG:py4j.java_gateway:Exception while closing

Traceback (most recent call last):

   File "/home/alex/virtualenv/asphalt/lib/python3.4/site-packages/py4j/java_gateway.py", line 290, in quiet_close

     closable.close()

AttributeError: 'NoneType' object has no attribute 'close'


Why is this happening?