diff --git a/CHANGES.md b/CHANGES.md
index 44270a9..e0d4440 100755
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -22,6 +22,108 @@
 # DO NOT REMOVE THIS MARKER; FOR INTERPOLATING CHANGES!-->
 # HBASE Changelog
 
+## Release 2.1.9 - Unreleased (as of 2020-02-10)
+
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23710](https://issues.apache.org/jira/browse/HBASE-23710) | Priority configuration for system coprocessors |  Major | Coprocessors |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23621](https://issues.apache.org/jira/browse/HBASE-23621) | Reduce number of Checkstyle violations in tests of hbase-common |  Minor | . |
+| [HBASE-23686](https://issues.apache.org/jira/browse/HBASE-23686) | Revert binary incompatible change and remove reflection |  Major | . |
+| [HBASE-23623](https://issues.apache.org/jira/browse/HBASE-23623) | Reduce number of Checkstyle violations in hbase-rest |  Minor | REST |
+| [HBASE-23645](https://issues.apache.org/jira/browse/HBASE-23645) | Fix remaining Checkstyle violations in tests of hbase-common |  Minor | . |
+| [HBASE-23646](https://issues.apache.org/jira/browse/HBASE-23646) | Fix remaining Checkstyle violations in tests of hbase-rest |  Minor | . |
+| [HBASE-23622](https://issues.apache.org/jira/browse/HBASE-23622) | Reduce number of Checkstyle violations in hbase-common |  Minor | . |
+| [HBASE-23626](https://issues.apache.org/jira/browse/HBASE-23626) | Reduce number of Checkstyle violations in tests of hbase-common |  Minor | . |
+| [HBASE-23635](https://issues.apache.org/jira/browse/HBASE-23635) | Reduce number of Checkstyle violations in hbase-mapreduce |  Minor | mapreduce |
+| [HBASE-23619](https://issues.apache.org/jira/browse/HBASE-23619) | Use built-in formatting for logging in hbase-zookeeper |  Trivial | Zookeeper |
+| [HBASE-23165](https://issues.apache.org/jira/browse/HBASE-23165) | [hbtop] Some modifications from HBASE-22988 |  Minor | . |
+| [HBASE-23654](https://issues.apache.org/jira/browse/HBASE-23654) | Please add Apache Trafodion and EsgynDB to "Powered by Apache HBase" page |  Major | documentation |
+| [HBASE-23333](https://issues.apache.org/jira/browse/HBASE-23333) | Include simple Call.toShortString() in sendCall exceptions |  Minor | Client, Operability |
+| [HBASE-23629](https://issues.apache.org/jira/browse/HBASE-23629) | Addition to Supporting projects page |  Minor | . |
+| [HBASE-23615](https://issues.apache.org/jira/browse/HBASE-23615) | Use a dedicated thread for executing WorkerMonitor in ProcedureExecutor. |  Major | amv2 |
+| [HBASE-23238](https://issues.apache.org/jira/browse/HBASE-23238) | Additional test and checks for null references on ScannerCallableWithReplicas |  Minor | . |
+| [HBASE-23239](https://issues.apache.org/jira/browse/HBASE-23239) | Reporting on status of backing MOB files from client-facing cells |  Major | mapreduce, mob, Operability |
+| [HBASE-23549](https://issues.apache.org/jira/browse/HBASE-23549) | Document steps to disable MOB for a column family |  Minor | documentation, mob |
+| [HBASE-23380](https://issues.apache.org/jira/browse/HBASE-23380) | General Cleanup of FSUtil |  Minor | Filesystem Integration |
+| [HBASE-23379](https://issues.apache.org/jira/browse/HBASE-23379) | Clean Up FSUtil getRegionLocalityMappingFromFS |  Minor | . |
+| [HBASE-23373](https://issues.apache.org/jira/browse/HBASE-23373) | Log \`RetriesExhaustedException\` context with full time precision |  Minor | asyncclient, Client |
+| [HBASE-23303](https://issues.apache.org/jira/browse/HBASE-23303) | Add security headers to REST server/info page |  Major | REST |
+| [HBASE-23361](https://issues.apache.org/jira/browse/HBASE-23361) | [UI] Limit two decimals even for total average load |  Minor | UI |
+| [HBASE-23365](https://issues.apache.org/jira/browse/HBASE-23365) | Minor change MemStoreFlusher's log |  Trivial | . |
+| [HBASE-23362](https://issues.apache.org/jira/browse/HBASE-23362) | WalPrettyPrinter should include the table name |  Minor | tooling |
+| [HBASE-23325](https://issues.apache.org/jira/browse/HBASE-23325) | [UI]rsgoup average load keep two decimals |  Minor | . |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23554](https://issues.apache.org/jira/browse/HBASE-23554) | Encoded regionname to regionname utility |  Major | shell |
+| [HBASE-23809](https://issues.apache.org/jira/browse/HBASE-23809) | The RSGroup shell test is missing |  Major | rsgroup, test |
+| [HBASE-17115](https://issues.apache.org/jira/browse/HBASE-17115) | HMaster/HRegion Info Server does not honour admin.acl |  Major | . |
+| [HBASE-23737](https://issues.apache.org/jira/browse/HBASE-23737) | [Flakey Tests] TestFavoredNodeTableImport fails 30% of the time |  Major | . |
+| [HBASE-23701](https://issues.apache.org/jira/browse/HBASE-23701) | Make sure HBaseClassTestRule doesn't suffer same issue as HBaseClassTestRuleChecker |  Minor | . |
+| [HBASE-23695](https://issues.apache.org/jira/browse/HBASE-23695) | Fail more gracefully when test class is missing Category |  Minor | . |
+| [HBASE-23679](https://issues.apache.org/jira/browse/HBASE-23679) | FileSystem instance leaks due to bulk loads with Kerberos enabled |  Critical | . |
+| [HBASE-23658](https://issues.apache.org/jira/browse/HBASE-23658) | Fix flaky TestSnapshotFromMaster |  Major | . |
+| [HBASE-23663](https://issues.apache.org/jira/browse/HBASE-23663) | Allow dot and hyphen in Profiler's URL |  Minor | profiler |
+| [HBASE-23587](https://issues.apache.org/jira/browse/HBASE-23587) | The FSYNC\_WAL flag does not work on branch-2.x |  Major | wal |
+| [HBASE-23589](https://issues.apache.org/jira/browse/HBASE-23589) | FlushDescriptor contains non-matching family/output combinations |  Critical | read replicas |
+| [HBASE-23376](https://issues.apache.org/jira/browse/HBASE-23376) | NPE happens while replica region is moving |  Minor | read replicas |
+| [HBASE-23360](https://issues.apache.org/jira/browse/HBASE-23360) | [CLI] Fix help command "set\_quota" to explain removing quota |  Minor | shell |
+| [HBASE-22096](https://issues.apache.org/jira/browse/HBASE-22096) | /storeFile.jsp shows CorruptHFileException when the storeFile is a reference file |  Major | UI |
+| [HBASE-23337](https://issues.apache.org/jira/browse/HBASE-23337) | Several modules missing in nexus for Apache HBase 2.2.2 |  Blocker | build, community, scripts |
+| [HBASE-23345](https://issues.apache.org/jira/browse/HBASE-23345) | Table need to replication unless all of cfs are excluded |  Minor | Replication |
+| [HBASE-23356](https://issues.apache.org/jira/browse/HBASE-23356) | When construct StoreScanner throw exceptions it is possible to left some KeyValueScanner not closed. |  Major | . |
+| [HBASE-23312](https://issues.apache.org/jira/browse/HBASE-23312) | HBase Thrift SPNEGO configs (HBASE-19852) should be backwards compatible |  Major | Thrift |
+| [HBASE-23197](https://issues.apache.org/jira/browse/HBASE-23197) | "IllegalArgumentException: Wrong FS" on edits replay when WALs on different file system and hbase.region.archive.recovered.edits is enabled. |  Major | . |
+| [HBASE-23336](https://issues.apache.org/jira/browse/HBASE-23336) | [CLI] Incorrect row(s) count  "clear\_deadservers" |  Minor | shell |
+| [HBASE-23237](https://issues.apache.org/jira/browse/HBASE-23237) | Negative 'Requests per Second' counts in UI |  Major | UI |
+| [HBASE-23328](https://issues.apache.org/jira/browse/HBASE-23328) | info:regioninfo goes wrong when region replicas enabled |  Major | read replicas |
+| [HBASE-22607](https://issues.apache.org/jira/browse/HBASE-22607) | TestExportSnapshotNoCluster::testSnapshotWithRefsExportFileSystemState() fails intermittently |  Major | test |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23793](https://issues.apache.org/jira/browse/HBASE-23793) | Increase maven heap allocation to 4G in Yetus personality |  Major | build, test |
+| [HBASE-23792](https://issues.apache.org/jira/browse/HBASE-23792) | [Flakey Test] TestExportSnapshotNoCluster.testSnapshotWithRefsExportFileSystemState |  Major | test |
+| [HBASE-23749](https://issues.apache.org/jira/browse/HBASE-23749) | TestHFileWriterV3 should have tests for all data block encodings |  Major | . |
+| [HBASE-23711](https://issues.apache.org/jira/browse/HBASE-23711) | Add test for MinVersions and KeepDeletedCells TTL |  Minor | . |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23821](https://issues.apache.org/jira/browse/HBASE-23821) | Generate CHANGES.md and RELEASENOTES.md for 2.1.9 |  Major | documentation |
+| [HBASE-23820](https://issues.apache.org/jira/browse/HBASE-23820) | Set version as 2.1.9 in branch-2.1 in prep for first RC of 2.1.9 |  Major | build, pom |
+| [HBASE-23320](https://issues.apache.org/jira/browse/HBASE-23320) | Upgrade surefire plugin to 3.0.0-M4 |  Major | dependencies, test |
+| [HBASE-20461](https://issues.apache.org/jira/browse/HBASE-20461) | Implement fsync for AsyncFSWAL |  Major | wal |
+| [HBASE-23358](https://issues.apache.org/jira/browse/HBASE-23358) | Set version as 2.1.9-SNAPSHOT in branch-2.1 |  Major | build, pom |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23760](https://issues.apache.org/jira/browse/HBASE-23760) | (2.1) Helper method to configure secure DFS cluster for tests |  Major | security, test |
+| [HBASE-23774](https://issues.apache.org/jira/browse/HBASE-23774) | Announce user-zh list |  Trivial | website |
+| [HBASE-23642](https://issues.apache.org/jira/browse/HBASE-23642) | Reintroduce ReplicationUtils.contains as deprecated |  Major | Replication |
+| [HBASE-23575](https://issues.apache.org/jira/browse/HBASE-23575) | Remove dead code from AsyncRegistry interface |  Minor | Client |
+
+
 ## Release 2.1.8 - Unreleased (as of 2019-11-19)
 
 
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 446e87b..f789025 100755
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -20,6 +20,105 @@
 # Be careful doing manual edits in this file. Do not change format
 # of release header or remove the below marker. This file is generated.
 # DO NOT REMOVE THIS MARKER; FOR INTERPOLATING CHANGES!-->
+# HBASE  2.1.9 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
+
+
+---
+
+* [HBASE-23554](https://issues.apache.org/jira/browse/HBASE-23554) | *Major* | **Encoded regionname to regionname utility**
+
+    Adds shell command regioninfo:
+
+      hbase(main):001:0\>  regioninfo '0e6aa5c19ae2b2627649dc7708ce27d0'
+      {ENCODED =\> 0e6aa5c19ae2b2627649dc7708ce27d0, NAME =\> 'TestTable,,1575941375972.0e6aa5c19ae2b2627649dc7708ce27d0.', STARTKEY =\> '', ENDKEY =\> '00000000000000000000299441'}
+      Took 0.4737 seconds
+
+
+---
+
+* [HBASE-17115](https://issues.apache.org/jira/browse/HBASE-17115) | *Major* | **HMaster/HRegion Info Server does not honour admin.acl**
+
+Implements authorization for the HBase Web UI by limiting access to certain endpoints which could be used to extract sensitive information from HBase.
+
+Access to these restricted endpoints can be limited to a group of administrators, identified either by a list of users (hbase.security.authentication.spnego.admin.users) or by a list of groups
+(hbase.security.authentication.spnego.admin.groups).  By default, neither of these values are set which will preserve backwards compatibility (allowing all authenticated users to access all endpoints).
+
+Further, users who have sensitive information in the HBase service configuration can set hbase.security.authentication.ui.config.protected to true which will treat the configuration endpoint as a protected, admin-only resource. By default, all authenticated users may access the configuration endpoint.
+
+
+---
+
+* [HBASE-23686](https://issues.apache.org/jira/browse/HBASE-23686) | *Major* | **Revert binary incompatible change and remove reflection**
+
+- Reverts a binary incompatible binary change for ByteRangeUtils
+- Usage of reflection inside CommonFSUtils removed
+
+
+---
+
+* [HBASE-23679](https://issues.apache.org/jira/browse/HBASE-23679) | *Critical* | **FileSystem instance leaks due to bulk loads with Kerberos enabled**
+
+This issues fixes an issue with Bulk Loading on installations with Kerberos enabled and more than a single RegionServer. When multiple tables are involved in hosting a table's regions which are being bulk-loaded into, all but the RegionServer hosting the table's first Region will "leak" one DistributedFileSystem object onto the heap, never freeing that memory. Eventually, with enough bulk loads, this will create a situation for RegionServers where they have no free heap space and will either spend all time in JVM GC, lose their ZK session, or crash with an OutOfMemoryError.
+
+The only mitigation for this issue is to periodically restart RegionServers. All earlier versions of HBase 2.x are subject to this issue (2.0.x, \<=2.1.8, \<=2.2.3)
+
+
+---
+
+* [HBASE-23619](https://issues.apache.org/jira/browse/HBASE-23619) | *Trivial* | **Use built-in formatting for logging in hbase-zookeeper**
+
+Changed the logging in hbase-zookeeper to use built-in formatting
+
+
+---
+
+* [HBASE-23320](https://issues.apache.org/jira/browse/HBASE-23320) | *Major* | **Upgrade surefire plugin to 3.0.0-M4**
+
+Bumped surefire plugin to 3.0.0-M4
+
+
+---
+
+* [HBASE-20461](https://issues.apache.org/jira/browse/HBASE-20461) | *Major* | **Implement fsync for AsyncFSWAL**
+
+Now AsyncFSWAL also supports Durability.FSYNC\_WAL.
+
+
+---
+
+* [HBASE-23239](https://issues.apache.org/jira/browse/HBASE-23239) | *Major* | **Reporting on status of backing MOB files from client-facing cells**
+
+<!-- markdown -->
+
+Users of the MOB feature can now use the `mobrefs` utility to get statistics about data in the MOB system and verify the health of backing files on HDFS.
+
+```
+HADOOP_CLASSPATH=/etc/hbase/conf:$(hbase mapredcp) yarn jar \
+    /some/path/to/hbase-shaded-mapreduce.jar mobrefs mobrefs-report-output some_table foo
+```
+
+See javadocs of the class `MobRefReporter` for more details.
+
+the reference guide has added some information about MOB internals and troubleshooting.
+
+
+---
+
+* [HBASE-23549](https://issues.apache.org/jira/browse/HBASE-23549) | *Minor* | **Document steps to disable MOB for a column family**
+
+The reference guide now includes a walk through of disabling the MOB feature if needed while maintaining availability.
+
+
+---
+
+* [HBASE-23312](https://issues.apache.org/jira/browse/HBASE-23312) | *Major* | **HBase Thrift SPNEGO configs (HBASE-19852) should be backwards compatible**
+
+The newer HBase Thrift SPNEGO configs should not be required. The hbase.thrift.spnego.keytab.file and hbase.thrift.spnego.principal configs will fall back to the hbase.thrift.keytab.file and hbase.thrift.kerberos.principal original configs. The older configs will log a deprecation warning. It is preferred to new the newer SPNEGO configurations.
+
+
+
 # HBASE  2.1.8 Release Notes
 
 These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.