[HDFS-15863] RBF: Validation message to be corrected in FairnessPolicyController

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: rbf
• Hadoop Flags: Reviewed
• Assignee: Renukaprasad C
• Reporter: Renukaprasad C
• Due: 17/Mar/21
• Created: 26/Feb/21 18:46
• Updated: 31/Mar/21 05:14
• Resolved: 31/Mar/21 05:03

Description

org.apache.hadoop.hdfs.server.federation.fairness.StaticRouterRpcFairnessPolicyController#validateCount

When dfs.federation.router.handler.count is lessthan the total dedicated handlers for all NS, then error message shows 0 & -ve values in error message, instead can show the actual configured values.

Current message is : "Available handlers -5 lower than min 0 for nsId nn1"
This can be changed to: "Configured handlers ${DFS_ROUTER_HANDLER_COUNT_KEY}=10 lower than min 15 for nsId nn1", where 10 is hander count & 15 is sum of dedicated handler count.

Related to: HDFS-14090

Issue Links

• is related to: HDFS-14090 RBF: Improved isolation for downstream name nodes. {Static}