https://community.cloudera.com/t5/Support-Questions/Post-upgrade-of-apache-nifi-cluster-getting-Failed-to/m-p/331782#M230978 <P>Hi All</P><P>&nbsp;</P><P>We have upgraded the 3 node nifi cluster from 1.7.1 to 1.12.1 after that we are getting below error:</P><P>&nbsp;</P><P>2021-12-07 01:22:12,822 ERROR [Compress Provenance Logs-1-thread-1] o.a.n.p.s.EventFileCompressor Failed to compress /opt/nifi/provenance_repository/uat1/8781241.prov on rollover</P><P>&nbsp;</P><P>When we saw in the provenance repository its compressed 10 mins before.</P><P>-rw-r-----. 1 bidanifiu1 bidanifiu1 791251 Dec 7 01:12 8781241.prov.gz</P><P>&nbsp;</P> Wed, 08 Dec 2021 13:02:43 GMT sam_001 2021-12-08T13:02:43Z