smallyao opened a new pull request, #3378:
URL: https://github.com/apache/ambari/pull/3378
## What changes were proposed in this pull request?
<pre>
2022-10-02 13:25:04,065 - File['/var/lib/ambari-agent/tmp/checkWebUI.py']
{'content': StaticFile('checkWebUI.py'), 'mode': 0775}
2022-10-02 13:25:04,067 - Execute['ambari-python-wrap
/var/lib/ambari-agent/tmp/checkWebUI.py -m bigtop3,bigtop4,bigtop1 -p 8480 -s
False -o PROTOCOL_TLSv1_2'] {'logoutput': True, 'tries': 5, 'user':
'ambari-qa', 'try_sleep': 3}
Cannot access WEB UI on: http://bigtop3:8480
2022-10-02 13:25:04,279 - Retrying after 3 seconds. Reason: Execution of
'ambari-python-wrap /var/lib/ambari-agent/tmp/checkWebUI.py -m
bigtop3,bigtop4,bigtop1 -p 8480 -s False -o PROTOCOL_TLSv1_2' returned 1.
Cannot access WEB UI on: http://bigtop3:8480
Cannot access WEB UI on: http://bigtop3:8480
2022-10-02 13:25:07,462 - Retrying after 3 seconds. Reason: Execution of
'ambari-python-wrap /var/lib/ambari-agent/tmp/checkWebUI.py -m
bigtop3,bigtop4,bigtop1 -p 8480 -s False -o PROTOCOL_TLSv1_2' returned 1.
Cannot access WEB UI on: http://bigtop3:8480
Cannot access WEB UI on: http://bigtop3:8480
2022-10-02 13:25:10,706 - Retrying after 3 seconds. Reason: Execution of
'ambari-python-wrap /var/lib/ambari-agent/tmp/checkWebUI.py -m
bigtop3,bigtop4,bigtop1 -p 8480 -s False -o PROTOCOL_TLSv1_2' returned 1.
Cannot access WEB UI on: http://bigtop3:8480
Cannot access WEB UI on: http://bigtop3:8480
2022-10-02 13:25:13,890 - Retrying after 3 seconds. Reason: Execution of
'ambari-python-wrap /var/lib/ambari-agent/tmp/checkWebUI.py -m
bigtop3,bigtop4,bigtop1 -p 8480 -s False -o PROTOCOL_TLSv1_2' returned 1.
Cannot access WEB UI on: http://bigtop3:8480
Cannot access WEB UI on: http://bigtop3:8480
</pre>
The reason is that http response code is 302 when access to
http://bigtop3:8480/.
And the code in checkWebUI.py at line 81 will see the reponse code 302 as a
failure.
## How was this patch tested?
Tested in local vm cluster, including kerberos authentication
hdfs service check before enableing kerberos authentication
hdfs service check after enabling kerberos authentication
Please review [Ambari Contributing
Guide](https://cwiki.apache.org/confluence/display/AMBARI/How+to+Contribute)
before opening a pull request.
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