From 52d3b22047d7e708a3da156c3e87006b4e1861d2 Mon Sep 17 00:00:00 2001
From: Himanshu Kandwal <hkandwal@linkedin.com>
Date: Tue, 17 Oct 2023 22:04:21 -0700
Subject: [PATCH] [apache/helix] -- Fixes #2638, Improve Hard Constraint
 Failure Debuggability by adding details in the error message

---
 .../waged/constraints/FaultZoneAwareConstraint.java          | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/constraints/FaultZoneAwareConstraint.java b/helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/constraints/FaultZoneAwareConstraint.java
index 11a0e9da57..e0992b5d4d 100644
--- a/helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/constraints/FaultZoneAwareConstraint.java
+++ b/helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/constraints/FaultZoneAwareConstraint.java
@@ -48,4 +48,9 @@ boolean isAssignmentValid(AssignableNode node, AssignableReplica replica,
     }
     return true;
   }
+
+  @Override
+  String getDescription() {
+    return "A fault zone cannot contain more than 1 replica of same partition";
+  }
 }