@Paresh Baldaniya There are already processors designed to make systems calls. ExecuteProcess -- Runs an operating system command specified by the user and writes the output of that command to a FlowFile. ExecuteStreamCommand -- Executes an external command on the contents of a flow file, and creates a new flow file with the results of the command. ExecuteScript -- Executes a script given the flow file and a process session. I would think the ExecuteProcess would be the best for your use case. ... View more

@Paresh Baldaniya We cannot change the existing filename in HDFS but we can do alternate solution in NiFi as below. You need to use UpdateAttribute processor before PutParquet processor. Update Attribute we are going to update the filename before putparquet processor so that everytime when file goes to putparquet processor will have same file name every time. Add new property to Update attribute processor filename desired_parquet_filename.prq Configs:- PutParquet:- So we are going to have same filename everytime and in this processor we need to change Overwrite Files property to True //if the same filename exists in the directory processor will replace the existing file with new file Configs:- Flow:- 1.GetFile 2.UpdateAttribute //change the filename by adding filename property 3.PutParquet //change the Overwrite files property to true If the Answer helped to resolve your issue, Click on Accept button below to accept the answer, That would be great help to Community users to find solution quickly for these kind of errors. ... View more