If you tried:
WSGIApplicationGroup %{GLOBAL}
as mentioned in the documentation, then next try:
https://modwsgi.readthedocs.io/en/master/user-guides/debugging-techniques.html#extracting-python-stack-traces
<https://modwsgi.readthedocs.io/en/master/user-guides/debugging-techniques.html#extracting-python-stack-traces>
to get out stack traces as to where it is getting stuck.
Note you will need to update the code example in that doc to work with Python 3
as appears to still be for Python 2.
Graham
> On 19 Oct 2020, at 10:08 pm, Manosh Padannayil <[email protected]>
> wrote:
>
> Hi Graham,
> Thanks for the reply. I tried different options as mentioned in the
> reply. Tried different versions of Python and http, but no luck.
> Actually, I compiled, httpd and python source code and installed the python
> package mod_wsgi.
>
> Below are the detailed steps I did;
> In a fresh VM: Oracle Linux 7.8
> 1. yum upgrade
> yum update
> yun install openssl-devel
> yun install libffi-devel
>
> 2. Compiled the following latest packages with prefix as
> --prefix=/path/to/apache/home
> pcre2-10.35
> expat-2.2.10
> apr-1.6.5
> apr-util-1.6.1
> httpd-4.4.46 : compiled with --enable-ssl --enable-so
>
> 3. Compiled python-3.9.0 with prefix as --prefix=/path/to/python/install/home
>
> 4. Install python packages: all latest versions:
> python3 -m pip install grpcio grpcio-tools protobuf mod-wsgi DJango
>
> 4. Configured /path/to/apache/home/conf/httpd.conf as below
>
> Listen 9000
> User my_username
> Group my_group
> ServerName localhost:9000
> <Directory "/">
> Require all granted
> </Directory>
> WSGIPythonHome /path/to/python/install/home
> LoadModule wsgi_module
> /path/to/python/install/home/lib/python3.9/site-packages/mod_wsgi/server/mod_wsgi-py39-cpython-39-x86_64-linux-gnu.so
>
> Started the apache as /path/to/apache/home/bin/apachectl start
>
> Below are the logs obtained.
>
> If I understood correctly from last reply, the python subinterpreter is
> loaded instead of primary interpreter when a GRPC api is invoked, causing the
> deadlock.
>
> Please let me know how to get rid of this deadlock issue with grpc client in
> mod_wsgi.
>
> Thanks and Regards,
> Manosh Padannayil
>
>
> On Thursday, October 15, 2020 at 2:11:09 AM UTC+5:30 Graham Dumpleton wrote:
> Are you forcing the use of the main Python interpreter?
>
> https://modwsgi.readthedocs.io/en/master/user-guides/application-issues.html#python-simplified-gil-state-api
>
> <https://modwsgi.readthedocs.io/en/master/user-guides/application-issues.html#python-simplified-gil-state-api>
>
> Likely their Python wrapper module isn't designed to work in Python sub
> interpreters.
>
> Also, are you using system Apache or mod_wsgi-express? Your configuration
> list is confusing since you mention multiple Apache versions as well as pip
> installed mod_wsgi and mod_wsgi-httpd packages.
>
> If you are using system Apache, you should not have mod_wsgi-httpd package
> installed and doing so could screw things up if trying to use mod_wsgi
> install against it with system Apache.
>
> Finally, are you using system Python packages, or Python from Python Software
> Foundation. You cannot use Anaconda Python if you want to be able to use SSL
> in Apache and Python.
>
> Graham
>
>
>> On 14 Oct 2020, at 10:23 pm, Manosh Padannayil <[email protected]
>> <applewebdata://3E84E550-C42D-4F6F-99E2-90D4A57C38BD>> wrote:
>>
>
>> Hello All,
>> I am getting the exact same issue reported in the below thread but for
>> Oracle Linux OS.
>> https://github.com/grpc/grpc/issues/13050
>> <https://github.com/grpc/grpc/issues/13050>
>>
>> Issue: Python Grpc client service method does not return when called from
>> httpd on Oracle Linux. It works from eclipse in OSX. Works from python
>> terminal in Oracle Linux, fails only when it is called from within httpd in
>> Oracle Linux.
>>
>> Configuration
>> Oracle Linux 7.8
>> httpd-2.4.41, 2.4.46
>> Python 3.8.0, 3.9.0
>> Django 2.2.6
>> grpcio 1.32.0
>> grpcio-tools 1.32.0
>> mod-wsgi 4.7.1
>> mod-wsgi-httpd 2.4.41.1
>>
>> Pseudo code:
>> from my.service import my_service_pb2_grpc
>> with open('/path/to/pem/file', 'rb') as f:
>> trusted_certs = f.read()
>> with open('path/to/key/file', 'rb') as f:
>> cert_key = f.read()
>> cred = grpc.ssl_channel_credentials(root_certificate=trusted_certs,
>> private_key=cert_key, certificate_chain=trusted_certs)
>> channel = grpc.secure_channel('{}:{}'.format('server_url',443), cred)
>> stub = my_service_pb2_grpc.MyServiceStub(channel)
>> response = stub.MyMethod(MyRequest)
>>
>> I tried with options grpc.keepalive_timeout_ms and grpc.keepalive_time as
>> 10000, but no luck.
>>
>> Could anyone please help me on this?
>>
>> Thanks and Regards,
>> Manosh Padannayil
>>
>
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