HBASE-22171 update CHANGES.txt for 1.2.12 RC0
diff --git a/CHANGES.txt b/CHANGES.txt
index 04caace..8d88e29 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,28 @@
HBase Change Log
+Release Notes - HBase - Version 1.2.12
+
+** Sub-task
+ * [HBASE-22152] - Create a jenkins file for yetus to processing GitHub PR
+
+** Bug
+ * [HBASE-20911] - correct Swtich/case indentation in formatter template for eclipse
+ * [HBASE-21135] - Build fails on windows as it fails to parse windows path during license check
+ * [HBASE-21990] - puppycrawl checkstyle dtds 404... moved to sourceforge
+ * [HBASE-22058] - upgrade thrift dependency to 0.9.3.1 on branches 1.4, 1.3 and 1.2
+ * [HBASE-22125] - Fix more instances in make_rc.sh where we need -Dhttps.protocols=TLSv1.2
+
+** New Feature
+ * [HBASE-21926] - Profiler servlet
+
+** Test
+ * [HBASE-21963] - Add a script for building and verifying release candidate
+
+** Task
+ * [HBASE-22171] - Release 1.2.12
+
+
Release Notes - HBase - Version 1.2.11 2019/02/25
** Sub-task
