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How to setup splunk db connect

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I have installed splunk 8.1.8 on my linux. On login to splunk UI, I have gone through apps and installed splunk_db_connect by uploading the zip file 


Then when I go to splunk_db_connect and setup. It is giving errors like 

"cant communicate with task server, please check your settings"

"str object have no attribute decode"


etc error messages in the UI.

On restarting splunk and on running btool I see the below message 


Checking: /opt/splunk/etc/apps/splunk_app_db_connect/default/inputs.conf
Invalid key in stanza [server] in /opt/splunk/etc/apps/splunk_app_db_connect/default/inputs.conf, line 2: run_only_one (value: false).
Invalid key in stanza [dbxquery] in /opt/splunk/etc/apps/splunk_app_db_connect/default/inputs.conf, line 5: run_only_one (value: false).



In logs, I see only one log file related to splunk_db_connect. The file name is splunk_app_db_connect_dbx.log. I cant see other files. In this log file I see below errors 


2022-02-18T06:45:18-0600 [ERROR] [], line 89 : Throwing an exception
Traceback (most recent call last):
File "/opt/splunk/etc/apps/splunk_app_db_connect/bin/dbx2/rest/", line 76, in handle_POST
File "/opt/splunk/etc/apps/splunk_app_db_connect/bin/dbx2/rest/", line 215, in validate_java_home
is_valid, reason = validateJRE(java_cmd)
File "/opt/splunk/etc/apps/splunk_app_db_connect/bin/dbx2/", line 73, in validateJRE
output = output.decode('utf-8')
AttributeError: 'str' object has no attribute 'decode'


Below is the snapshot of splunk_db_connect settings in the UI



Please help me how to resolve the issues and setup splunk DB connect succesfully.


Thanking you.

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