Splunk UF unable to send logs getting error- An existing connection was forcibly closed by the remote

[Y7698will]

Splunk UF is not sending logs to Splunk. The Splunkd constitutes full of errors and warnings as below.

The telnet connection to DS and Indexers is successful at 8089 and 9997 respectively. It is a windows server and service is up and running

ERROR TcpOutputFd - Read error. An existing connection was forcibly closed by the remote host.
WARN TcpOutputProc - Applying quarantine to ip=**888* port=9997 _numberOfFailures=2
03-28-2022 04:50:44.070 +1100 ERROR TcpOutputFd - Read error. An existing connection was forcibly closed by the remote host.
03-28-2022 04:50:44.070 +1100 WARN TcpOutputProc - Applying quarantine to ip=*8888* port=9997 _numberOfFailures=2

[pkumar9610]

Check if tcp port was not setup or setup with wrong port in the inputs.conf file. Adding or correcting the tcp entry and restart Splunk will work. 

Hope this helps !!! Good Luck 

[richgalloway]

If you're using SSL, make sure you have the right certificate installed on both ends of the connection.

Check the indexer's logs to see if they offer more information about the problem.