You need to apply this command   rm -rf /dn/yarn/nm/usercache/*  { this is my configuration }   Please check you configuration inside YARN (MR2 Included) NodeManager Local Directories .    http://i.imgur.com/BHwhUnB.jpg   You need to apply this to data nodes which reported error by the YARN   This is sample of my case    http://i.imgur.com/miNx454.jpg   ApplicationMaster reported that  C90BFH04.localdomain:8042 , which is data node no 4 . So i applied only to the YARN directory in Node no 4   After that everything is OK !   ... View more