From 5af490cb6bed065dee0d0e8c2984f2090919fcdf Mon Sep 17 00:00:00 2001
From: Todd Lipcon <todd@apache.org>
Date: Thu, 1 Sep 2011 21:14:08 +0000
Subject: [PATCH] HBASE-4323  Add debug logging when AssignmentManager can't
 make a plan for a region.

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1164277 13f79535-47bb-0310-9956-ffa450edef68
---
 CHANGES.txt                                                 | 2 ++
 .../org/apache/hadoop/hbase/master/AssignmentManager.java   | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/CHANGES.txt b/CHANGES.txt
index aadef53b7ed..faa7e58465f 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -527,6 +527,8 @@ Release 0.90.5 - Unreleased
                cases (todd)
    HBASE-4276  AssignmentManager debug logs should be at INFO level for
                META/ROOT regions (todd)
+   HBASE-4323  Add debug logging when AssignmentManager can't make a plan
+               for a region (todd)
 
 Release 0.90.4 - August 10, 2011
 
diff --git a/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java b/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
index a5562392faf..13af86a035c 100644
--- a/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
+++ b/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
@@ -1236,7 +1236,11 @@ public class AssignmentManager extends ZooKeeperListener {
         return;
       }
       RegionPlan plan = getRegionPlan(state, forceNewPlan);
-      if (plan == null) return; // Should get reassigned later when RIT times out.
+      if (plan == null) {
+        debugLog(state.getRegion(),
+            "Unable to determine a plan to assign " + state);
+        return; // Should get reassigned later when RIT times out.
+      }
       try {
         debugLog(state.getRegion(),
           "Assigning region " + state.getRegion().getRegionNameAsString() +