Graylog 4.0.15 Freezes proxmox host randomly

[tmacgbay]

It could be an errant GROK on a message that has changed slightly - here is a relevant post to that:

Graylog nodes stop outputting/fill up buffers

The original data was full of PII, I compiled a minimal example. All this was part of a bigger grok pattern, but the surrounding things are not relevant. The relevant part of the pattern looked like this: ‘(<%{EMAILLOCALPART}@%{HOSTNAME}>[,\s]?)+’ generating this regular expression: ‘(<[a-zA-Z][a-zA-Z0-9_.±=:]+@\b(?:[0-9A-Za-z][0-9A-Za-z-]{0,100})(?:.(?:[0-9A-Za-z][0-9A-Za-z-]{0,100}))*(.?|\b)>[,\s]?)+’ This is the relevant extract from the message '<asdf@inv.alid> <asdf@inv.alid> <asd…