From d525629eb57551951e56f9ea35c5c50eb575de95 Mon Sep 17 00:00:00 2001
From: guluo <lupeng_nwpu@qq.com>
Date: Thu, 6 Jul 2023 10:32:38 +0800
Subject: [PATCH] HBASE-27859 HMaster.getCompactionState can happen NPE when
 region state is closed (#5232)

Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Wellington Chevreuil <wchevreuil@apache.org>
(cherry picked from commit b2e2abe64bd9f3d511b8193510fe66c76ff7854c)
---
 .../main/java/org/apache/hadoop/hbase/master/HMaster.java    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
index 3d59db245015..8cb40cb58803 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
@@ -4208,6 +4208,11 @@ public CompactionState getCompactionState(final TableName tableName) {
           continue;
         }
         RegionMetrics regionMetrics = sl.getRegionMetrics().get(regionInfo.getRegionName());
+        if (regionMetrics == null) {
+          LOG.warn("Can not get compaction details for the region: {} , it may be not online.",
+            regionInfo.getRegionNameAsString());
+          continue;
+        }
         if (regionMetrics.getCompactionState() == CompactionState.MAJOR) {
           if (compactionState == CompactionState.MINOR) {
             compactionState = CompactionState.MAJOR_AND_MINOR;