Splunk web service unable to start after upgrade to 8

[pbalbasdtt]

Hi all,

We are in the process of upgrade splunk version from 7.3.3 to 8.0.6. After running the Readiness app and solving all the blocker/warning items, we have proceed to run the upgrade. We are able to start the splunkd service, but the web stucks in waiting for web server forever.

Checking web_service.log, we find this error trace:

2021-01-07 14:30:20,566 ERROR   [5ff70cec707fc132868e50] root:772 - Unable to start splunkweb

2021-01-07 14:30:20,566 ERROR   [5ff70cec707fc132868e50] root:773 - 'dict' object has no attribute 'iteritems'

Traceback (most recent call last):

  File "/opt/splunk/searchhead/lib/python3.7/site-packages/splunk/appserver/mrsparkle/root.py", line 132, in <module>

    from splunk.appserver.mrsparkle.controllers.top import TopController

  File "/opt/splunk/searchhead/lib/python3.7/site-packages/splunk/appserver/mrsparkle/controllers/top.py", line 27, in <module>

    from splunk.appserver.mrsparkle.controllers.admin import AdminController

  File "/opt/splunk/searchhead/lib/python3.7/site-packages/splunk/appserver/mrsparkle/controllers/admin.py", line 17, in <module>

    import formencode

  File "/opt/splunk/searchhead/lib/python3.7/site-packages/formencode/__init__.py", line 9, in <module>

    from formencode import validators

  File "/opt/splunk/searchhead/lib/python3.7/site-packages/formencode/validators.py", line 15, in <module>

    import dns.resolver

  File "/opt/splunk/searchhead/etc/apps/generateblocklist_app/bin/dns/resolver.py", line 32, in <module>

    import dns.flags

  File "/opt/splunk/searchhead/etc/apps/generateblocklist_app/bin/dns/flags.py", line 51, in <module>

    _by_value = dict([(y, x) for x, y in _by_text.iteritems()])

AttributeError: 'dict' object has no attribute 'iteritems'

Does anyone know how to solve this issue? Thanks in advance.

Best regards.

[scelikok · Accepted solution]

Hi, 

Did you check below document?

To prevent issues starting Splunk Web, revise apps for Python 3 compatibility. If an app cannot be upgraded, it must be removed for Splunk Web to start.

https://docs.splunk.com/Documentation/Splunk/8.0.6/Python3Migration/ChangesEnterprise#Splunk_Web 

If this reply helps you an upvote is appreciated.

[pbalbasdtt]

Hi, 

Many thanks for your help!! We deleted the app that appears on the web logs and now everything is working again. 

Best .

[pereiramj]

We are having the same issue when upgrading from 7.3.6 -> 8.0.7.