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Cant find root cause of thread.lock error
burlyboys
Unladen Swallow
Posts: 1
Threads: 1
Joined: May 2020
Reputation: 0
#1
May-18-2020, 12:51 PM (This post was last modified: May-18-2020, 06:40 PM by Larz60+.)
I am porting some python 3 code back to 2.7 to support a ROS implementation and am stuck on a thread.lock error when starting my process. The code that errors out is as follows:

from bin.gui.mainWindow_ui import *

from bin.client.Server import Server
from bin.common.Logger import Logger as log
from bin.common.Constants import Constants as con
from bin.parse.Data_NoROS import Data as data
from multiprocessing import Process, Pipe
import os
import time

LOG = log('DEBUG')
DATA = data()
SERVER = Server(DATA, LOG)

TAG = "MainWindow"


class MainWindow(QtWidgets.QMainWindow):
"""
Handles the ui elements and connects to worker service to execute processes.
"""

def __init__(self):
"""
Initializes values for the UI.
"""
QtWidgets.QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.running = False

# configures
self._configure_signals()

# enable ui
self._enable_ui()
self.ui.textEdit_2.setText(' Not Connected')

# setup server process
self.gui_conn, self.data_conn = Pipe()
self.listenProcess = Process(target=SERVER.Listen, args=(self.data_conn,))

def Connect(self):
"""
Starts the server process for acquisition of the selected serial port.
This function is connected to the clicked signal of the Start button.
"""
self.running = True
LOG.i(TAG, "User clicked CONNECT")

self.listenProcess.start()
LOG.i(TAG, "Started Server Process as: PID".format(os.getpid()))

self.ui.textEdit_2.setTextColor(QtCore.Qt.darkGreen)
self.ui.textEdit_2.setText('\tSYSTEM READY')

self.UpdateGUI()



Once I enter the connect function and get to self.listenProcess.start() i get the following error:



Traceback (most recent call last):

File "I:\eCHRApplication\bin\gui\mainWindow.py", line 60, in Connect

self.listenProcess.start()

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\process.py", line 130, in start

self._popen = Popen(self)

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 277, in __init__

dump(process_obj, to_child, HIGHEST_PROTOCOL)

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 199, in dump

ForkingPickler(file, protocol).dump(obj)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 224, in dump

self.save(obj)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 67, in dispatcher

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 401, in save_reduce

save(args)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 554, in save_tuple

save(element)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 731, in save_inst

save(stuff)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 692, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 606, in save_list

self._batch_appends(iter(obj))

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 642, in _batch_appends

save(tmp[0])

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 306, in save

rv = reduce(self.proto)

TypeError: can't pickle thread.lock objects

Initializing server object

Traceback (most recent call last):

File "<string>", line 1, in <module>

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 381, in main

self = load(from_parent)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 1384, in load

return Unpickler(file).load()

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 864, in load

dispatch[key](self)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 886, in load_eof

raise EOFError

EOFError



Any help in finding the root cause would be greatly appreciated.
Sorry new to forum and forgot to use tags
Sorry!!!! Here is an easier to read version actually using tags

I am porting some python 3 code back to 2.7 to support a ROS implementation and am stuck on a thread.lock error when starting my process. The code that errors out is as follows:
from bin.gui.mainWindow_ui import *

from bin.client.Server import Server
from bin.common.Logger import Logger as log
from bin.common.Constants import Constants as con
from bin.parse.Data_NoROS import Data as data
from multiprocessing import Process, Pipe
import os
import time

LOG = log('DEBUG')
DATA = data()
SERVER = Server(DATA, LOG)

TAG = "MainWindow"


class MainWindow(QtWidgets.QMainWindow):
    """
    Handles the ui elements and connects to worker service to execute processes.
    """

    def __init__(self):
        """
        Initializes values for the UI.
        """
        QtWidgets.QMainWindow.__init__(self)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.running = False

        # configures
        self._configure_signals()

        # enable ui
        self._enable_ui()
        self.ui.textEdit_2.setText('     Not Connected')

        # setup server process
        self.gui_conn, self.data_conn = Pipe()
        self.listenProcess = Process(target=SERVER.Listen, args=(self.data_conn,))

    def Connect(self):
        """
        Starts the server process for acquisition of the selected serial port.
        This function is connected to the clicked signal of the Start button.
        """
        self.running = True
        LOG.i(TAG, "User clicked CONNECT")

        self.listenProcess.start()
        LOG.i(TAG, "Started Server Process as: PID".format(os.getpid()))

        self.ui.textEdit_2.setTextColor(QtCore.Qt.darkGreen)
        self.ui.textEdit_2.setText('\tSYSTEM READY')

        self.UpdateGUI()
Once I enter the connect function and get to self.listenProcess.start() i get the following error:


Error:
Traceback (most recent call last):

File "I:\eCHRApplication\bin\gui\mainWindow.py", line 60, in Connect

self.listenProcess.start()

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\process.py", line 130, in start

self._popen = Popen(self)

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 277, in __init__

dump(process_obj, to_child, HIGHEST_PROTOCOL)

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 199, in dump

ForkingPickler(file, protocol).dump(obj)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 224, in dump

self.save(obj)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 67, in dispatcher

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 401, in save_reduce

save(args)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 554, in save_tuple

save(element)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 731, in save_inst

save(stuff)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 692, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 606, in save_list

self._batch_appends(iter(obj))

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 642, in _batch_appends

save(tmp[0])

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 331, in save

self.save_reduce(obj=obj, *rv)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 425, in save_reduce

save(state)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 286, in save

f(self, obj) # Call unbound method with explicit self

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 655, in save_dict

self._batch_setitems(obj.iteritems())

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 687, in _batch_setitems

save(v)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 306, in save

rv = reduce(self.proto)

TypeError: can't pickle thread.lock objects

Initializing server object

Traceback (most recent call last):

File "<string>", line 1, in <module>

File "C:\Users\Desktop\Anaconda2\lib\multiprocessing\forking.py", line 381, in main

self = load(from_parent)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 1384, in load

return Unpickler(file).load()

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 864, in load

dispatch[key](self)

File "C:\Users\Desktop\Anaconda2\lib\pickle.py", line 886, in load_eof

raise EOFError

EOFError
Any help in finding the root cause would be greatly appreciated.
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