@enam, have you check the state of the ListSFTP processor (action "view State")? With the listing strategy equals "Tracking timestamp", the processor save the last time it checks the SFTP folder and don't retrieve older files than this timestamp. ... View more

Hello, Here is the threaddump of last restart of node 2304. We took a threaddump every 5 minutes: threaddump  I notice only "Cleanup Archive for contentX" that seems take more than 5 minutes for some content repo. Don't know if this cleaning can be a blocking point. And maybe I'm missing something on the interpretation of threaddump. I take also some screens of the cluster view to check if there is more usage of the 2 bad nodes (2304 and 2311). The 2 nodes has 40GB more flowfiles (6% of usage instead of 5% for others): Screen cluster  Nifi is clustered and we have three zookeeper server nodes dedicated for Nifi. Do you know how we can check zookeeper actions: election of the Cluster and Primary role? Thanks for your help Best Regards ... View more

@MattWho  Thanks for your reply. Unfortunately it is not that simple to do a version upgrade, it is a production cluster. What I don't understand is that only two nodes pose a problem and they are always the same 2 nodes. Thanks and Best Regards ... View more