From 1931714583518ce5febadc29aa4e3a41b7156378 Mon Sep 17 00:00:00 2001
From: Viraj Jasani <vjasani@apache.org>
Date: Fri, 6 Mar 2020 13:01:17 +0530
Subject: [PATCH] HBASE-23909 : list_regions raise correct error if it is being
 splitted/merged/transitioning (#1238)

Signed-off-by: Wellington Ramos Chevreuil <wchevreuil@apache.org>
Signed-off-by: Peter Somogyi <psomogyi@apache.org>
Signed-off-by: Jan Hentschel <jan.hentschel@ultratendency.com>
---
 hbase-shell/src/main/ruby/shell/commands/list_regions.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/hbase-shell/src/main/ruby/shell/commands/list_regions.rb b/hbase-shell/src/main/ruby/shell/commands/list_regions.rb
index 5ad6f1a00a8..96581f18c4a 100644
--- a/hbase-shell/src/main/ruby/shell/commands/list_regions.rb
+++ b/hbase-shell/src/main/ruby/shell/commands/list_regions.rb
@@ -208,7 +208,12 @@ EOF
 
       def get_regions_for_server(regions_for_table, server_name)
         regions_for_table.select do |hregion|
-          accept_server_name? server_name, hregion.getServerName.toString
+          actual_server_name = hregion.getServerName
+          if actual_server_name == nil
+            raise "Some regions might be splitting or merging or transitioning due to other" \
+            " reasons"
+          end
+          accept_server_name? server_name, actual_server_name.toString
         end
       end