Does Hadoop MR supports inter-process communication between

Does Hadoop MR supports inter-process communication between the task trackers? Have a scenario where it requires to communicate other nodes in the cluster to continue the process. What are the different options are available to over come this.

Hello, as far as I know, Hadoop does not support native interprocess communication between task-trackers. What is the use case you are trying to solve. It sounds unusual that different task trackers will need to talk to each other. By design Hadoop task trackers are supposed to work independently.