Fluentbit Tail input documentation[1] says that by default maximum buffer size is 32K which turned out to be too small in practice because we hit a situation where enb.xlog started to have lines with ~ 34K and so fluentbit ingestion stopped to work with the following error in fluentbit log:

[2024/10/23 20:30:23] [error] [input:tail:tail.0] file=/srv/slapgrid/slappart19/srv/monitor/public/enb.xlog requires a larger buffer size, lines are too long. Skipping file.

-> Fix that by increasing max buffer size to 1M which seems to be high enough at least for now.

Maybe it will make sense to configure this as unlimited, but I'm not sure if going as unlimited is universally a good idea.

[1] https://docs.fluentbit.io/manual/pipeline/inputs/tail

/cc @lu.xu, @jhuge, @tomo, @paul.graydon