Warning: We are having troubles communicating to the indexer process. The information might be stale

Temp. changing the permissions of “var/local” solved the problem. But I still think there is a upper/lowercase problem, because now I have two subdirectories “cbIndex” and “cbindex”.

I also found another problem now in the indexer.log:

 dial tcp 10.112.12.149:9999: connection refused

According to the installation note, this port is not required to be opened:

Please note that you have to update your firewall configuration to
allow connections to the following ports: 11211, 11210, 11209, 4369,
8091, 8092, 8093, 9100 to 9105, 9998, 18091, 18092, 11214, 11215 and
from 21100 to 21299.

But in another thread I found that it needs to be open: