Error in readChar(con, 5L, useBytes = TRUE) : cannot open the connection In addition: Warning message: In readChar(con, 5L, useBytes = TRUE) :
** cannot open compressed file 'hdfs:///user/sankar/RDA File/JAN2017.rda', probable reason 'No such file or directory'**
I think you need to use a specific tools ( or command line) to read from hdfs file system. You can't read like a classic file path. hdfs is a specific distributed file system and R load() function don't know how to deal with this.
Otherwise, you need to download the file for use in your local filesystem.