Here is the traceback from the log:

Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: pulp: django.request:ERROR: 
Internal Server Error: /pulp/api/v3/tasks/
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: Traceback (most recent call 
last):
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/django/core/handlers/exception.py",
 line 34, in inner
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: response = 
get_response(request)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/django/core/handlers/base.py", 
line 115, in _get_response
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: response = 
self.process_exception_by_middleware(e, request)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/django/core/handlers/base.py", 
line 113, in _get_response
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: response = 
wrapped_callback(request, *callback_args, **callback_kwargs)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/django/views/decorators/csrf.py",
 line 54, in wrapped_view
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: return view_func(*args, 
**kwargs)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/viewsets.py", 
line 116, in view
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: return self.dispatch(request, 
*args, **kwargs)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/views.py", line 
495, in dispatch
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: response = 
self.handle_exception(exc)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/views.py", line 
455, in handle_exception
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: 
self.raise_uncaught_exception(exc)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/views.py", line 
492, in dispatch
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: response = handler(request, 
*args, **kwargs)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/mixins.py", line 
45, in list
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: return 
self.get_paginated_response(serializer.data)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 768, in data
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: ret = super(ListSerializer, 
self).data
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 262, in data
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: self._data = 
self.to_representation(self.instance)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 686, in to_representation
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: 
self.child.to_representation(item) for item in iterable
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 686, in <listcomp>
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: 
self.child.to_representation(item) for item in iterable
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 530, in to_representation
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: ret[field.field_name] = 
field.to_representation(attribute)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/relations.py", 
line 542, in to_representation
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: for value in iterable
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/relations.py", 
line 542, in <listcomp>
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: for value in iterable
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/pulpcore-3.0.0rc3.dev0-py3.6.egg/pulpcore/app/serializers/task.py",
 line 25, in to_representation
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: return 
serializer.data.get('_href')
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 563, in data
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: ret = super(Serializer, 
self).data
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 262, in data
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: self._data = 
self.to_representation(self.instance)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/rest_framework/serializers.py", 
line 530, in to_representation
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: ret[field.field_name] = 
field.to_representation(attribute)
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: File 
"/opt/python/3.6.5/lib/python3.6/site-packages/pulpcore-3.0.0rc3.dev0-py3.6.egg/pulpcore/app/serializers/fields.py",
 line 248, in to_representation
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: host.strip('/'),
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: AttributeError: 'NoneType' 
object has no attribute 'strip'
Jun 25 13:53:08 ip-1-76-158-221 gunicorn[147692]: 127.0.0.1 - admin 
[25/Jun/2019:17:53:08 +0000] "GET /pulp/api/v3/tasks/ HTTP/1.1" 500 27 "-" 
"HTTPie/0.9.4

From: [email protected] At: 06/25/19 13:46:18To:  Bin Li (BLOOMBERG/ 120 PARK 
) 
Cc:  [email protected]
Subject: Re: [Pulp-list] Pulp 3 internal error

The logs are available in journalctl. I usually run 'sudo journalctl -l -f' to 
monitor the logs. What is the traceback that is emitted when you query this 
task?

A possibly related issue got filed today: https://pulp.plan.io/issues/4945
On Tue, Jun 25, 2019 at 1:35 PM Bin Li (BLOOMBERG/ 120 PARK) 
<[email protected]> wrote:


I suddenly got a internal 500 error when query a task which creates a 
publication. Restarted all pulp daemons didn't help. Still able to GET 
repositories, publications, remotes information but query tasks and 
distributions gave me internal error. Database looks fine. I am able connect 
and login postgresql as pulp user.  How do I troubleshot this issue?

used the following to create distribution:
http POST http://localhost:24817/pulp/api/v3/distributions/rpm/rpm/<<EOF
{
"base_path": "bloomberg/systems_third_party_rhel7.2",
"name": "systems_third_party_rhel7.2",
"publication": 
"/pulp/api/v3/publications/rpm/rpm/894a8109-001b-42fc-8658-4ac28bc52c0e/"
}
EOF


Below is current status:
{
    "database_connection": {
        "connected": true
    }, 
    "missing_workers": [], 
    "online_workers": [
        {
            "_created": "2019-06-20T18:34:01.015187Z", 
            "_href": 
"/pulp/api/v3/workers/fd7dc86c-3bff-4631-a86d-f49f618d3a79/", 
            "last_heartbeat": "2019-06-25T17:14:50.374396Z", 
            "missing": false, 
            "name": "[email protected]", 
            "online": true
        }, 
        {
            "_created": "2019-06-20T18:34:01.347733Z", 
            "_href": 
"/pulp/api/v3/workers/b4dfbb8a-69f4-4411-9311-ff84a63756c0/", 
            "last_heartbeat": "2019-06-25T17:14:50.575492Z", 
            "missing": false, 
            "name": 
"reserved-resource-worke...@ip-1-76-158-221.drr1.bcpc.bloomberg.com", 
            "online": true
        }, 
        {
            "_created": "2019-06-20T18:34:01.463024Z", 
            "_href": 
"/pulp/api/v3/workers/d1db2594-52b6-402e-8ef1-7c0a5635c3c4/", 
            "last_heartbeat": "2019-06-25T17:14:50.976399Z", 
            "missing": false, 
            "name": 
"reserved-resource-worke...@ip-1-76-158-221.drr1.bcpc.bloomberg.com", 
            "online": true
        }
    ], 
    "redis_connection": {
        "connected": true
    }, 
    "versions": [
        {
            "component": "pulpcore", 
            "version": "3.0.0rc3.dev0"
        }, 
        {
            "component": "pulpcore-plugin", 
            "version": "0.1.0rc3.dev0"
        }, 
        {
            "component": "pulp_rpm", 
            "version": "3.0.0b4.dev0"
        }
    ]
}


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