SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder" Error when running reindexing in Opengrok

[oliver-ap]

Hi everyone,

Not so long ago some of my projects started to face the following issue when performing the opengrok-reindex-project command.
Error Output:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Indexer command for project $PROJECT_NAME failed (return code -9)
!!! WARNING: Command <command_run> exited with non zero return code 1

I'm using the per project management structure, the command I'm running is:

opengrok-reindex-project -J=-Xmx15g -J=-server -a /var/opengrok/dist/lib/opengrok.jar 
  -t /var/opengrok/etc/logging.properties                     
  -p $PROJECT_NAME
  -d /var/opengrok/log/$PROJECT_NAME                     
  -P $PROJECT_NAME
  -U http://localhost:8080/                     
  -- -G -m 256 -c /usr/local/bin/ctags                     
  -U http://localhost:8080/ 
  -H $PROJECT_NAME

Somehow I think the error is related to the #2130 issue, aka when the index finds a file that contains one immense term or when special characters are found. I'm saying this because before facing this issue I was facing the one specified in the #2130, but after implementing OPENGROK_ALL_NONWHITESPACE=on as an env. variable as suggested in the #2104 the old error apparently disappeared and this new error started showing.

I tried looking for this error in the community, but I didn't find a solution to my case.
I would appreciate all the help you could give me, thank you so much!

Opengrok version: 1.7.2
Tomcat version: 10.0.5
Git version: 2.17.1