[YARN-1722] AMRMProtocol should have a way of getting all the nodes in the cluster

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.2.0
• Assignee: Unassigned
• Reporter: Bikas Saha
• Created: 13/Feb/14 01:55
• Updated: 13/Apr/14 22:36
• Resolved: 13/Apr/14 22:36

Description

There is no way for an AM to find out the names of all the nodes in the cluster via the AMRMProtocol. An AM can only at best ask for containers at * location. The only way to get that information is via the ClientRMProtocol but that is secured by Kerberos or RMDelegationToken while the AM has an AMRMToken. This is a pretty important piece of missing functionality. There are other jiras opened about getting cluster topology etc. but they havent been addressed due to a clear definition of cluster topology perhaps. Adding a means to at least get the node information would be a good first step.

Issue Links

• is duplicated by: YARN-435 Make it easier to access cluster topology information in an AM