@Sivagopal   Check out this post for a similar scenario.  It includes a solution:   https://community.cloudera.com/t5/Support-Questions/Nifi-1-16-fails-to-start-with-Decryption-exception/m-p/358190     ... View more

@fahed What you see with the CDP Public Cloud Data Hubs using GCS (or object store) is a modernization of the platform around object storage.  This removes differences across aws, azure, and on-prem (when Ozone is used).    It is a change by customer demand so that workloads are able to be built and deployed with minimal changes from on prem to cloud or cloud to cloud.   Unfortunately that creates a difference you describe above, but those are risks we are willing to take ourselves in favor of modern data architecture.   If you are looking for performance, you should take a look at some of the newer options for databases: impala and kudu (this one uses local disk).  Also we have Iceberg coming into this space too. ... View more

@Pierro6AS  First thing you should do is increase the size of the message queue.  The default size is quite low (10,000 records and 1gb).   It is possible to see this error if the flowfiles have been in the queue for too long.   It is also possible to see this error if the file system has other usage outside of nifi.  For best performance nifi's backing folder structure (content/flowfile repository) should be dedicated disks that are larger than the demand of the flow (especially during heavy unexpected volume).     You can find more about this in these posts: https://community.cloudera.com/t5/Support-Questions/Unable-to-write-flowfile-content-to-content-repository/td-p/346984 https://community.cloudera.com/t5/Support-Questions/Problem-with-Merge-Content-Processor-after-switch-to-v-1-16/m-p/346096/highlight/true#M234750   ... View more

@kishan1 In order to restart a specific processor group you will need to use some command line magic against the Nifi API.  For example, this could be done by using a command to stop the processor group, then the restart nifi command, then start processor group.  You can certainly be creative in how you handle that approache once you have experimented with the API.   https://nifi.apache.org/docs/nifi-docs/rest-api/index.html     ... View more