The flowfiles are stuck on AttributesToJson. Other processors, before/after ATJ, all worked as expected. We have 3 other ATJ processors on different group and all encountered similar behavior. It stuck like 5-10 minutes and then continued again.
Checklist when it happened (troubleshooting): RAM: good CPU: good Overall flowfiles size: 300mb, good No other processors behaved like it.
I tried to find online articles to see if other encounter this but couldn't find one.
NiFi version: 1.12.1 Java:
OpenJDK version "1.8.0_282"
OpenJDK 64-Bit Server VM (build 25.282-b08, mixed mode) AttributesToJson: running in All Nodes