django、subprocess多进程 报错django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet. 5C

在django程序中,使用了subprocess多进程,代码如下。

#开始启动进程去处理业务 使用跨平台的多进程库subprocess
    PYTHON = sys.executable
    shell_cmd = '"%s" -m supportchannel.wechat_servers.wechatProcess %s' % (PYTHON, userKey) #let servers be a package
    cmd = shlex.split(shell_cmd)
    try:
        child = subprocess.Popen(args=cmd, shell=False)

程序在运行的时候报错django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet. 感觉是subprocess的多进程无法和djangoapp通讯,求解决方法。

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"/home/huangdonglin/.virtualenvs/django_py3/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 111, in execute cursor.execute(sql, params) File "/home/huangdonglin/.virtualenvs/django_py3/lib/python3.6/site-packages/django/db/backends/utils.py", line 79, in execute return super(CursorDebugWrapper, self).execute(sql, params) File "/home/huangdonglin/.virtualenvs/django_py3/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute return self.cursor.execute(sql, params) File "/home/huangdonglin/.virtualenvs/django_py3/lib/python3.6/site-packages/django/db/utils.py", line 97, in __exit__ six.reraise(dj_exc_type, dj_exc_value, traceback) File "/home/huangdonglin/.virtualenvs/django_py3/lib/python3.6/site-packages/django/utils/six.py", line 658, in reraise raise value.with_traceback(tb) File "/home/huangdonglin/.virtualenvs/django_py3/lib/python3.6/site-packages/django/db/backends/utils.py", line 62, in execute return self.cursor.execute(sql) File 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