HDP-CHANGES.txt

HDP-2.4 is based on Apache HBase 1.1.2

Following are the changes on top of Apache HBase 1.1.1

HBASE-14307 Incorrect use of positional read api in HFileBlock (Chris Nauroth)
HBASE-14963 Remove Guava dependency from HBase client code (ddas)
HBASE-14947 WALProcedureStore improvements (Matteo Bertozzi)
HBASE-14843 TestWALProcedureStore.testLoad is flakey (Matteo Bertozz)
HBASE-14712 Increase MasterProcWALs clean up granularity (Matteo Bertozzi)
HBASE-14468 Compaction improvements: FIFO compaction policy (Vladimir Rodionov)
HBASE-14987 Compaction marker whose region name doesn't match current region's needs to be handled
HBASE-14471 Thrift -  HTTP Error 413 full HEAD if using kerberos authentication
HBASE-15035 bulkloading hfiles with tags that require splits do not preserve tags (Jonathan Hsieh)
HBASE-14761 Deletes with and without visibility expression do not delete the matching mutation (Ram)
HBASE-14575 Relax region read lock for compactions
HBASE-15022 replication_admin.rb throws undefined method 'getZooKeeperClusterKey' for ZKUtil (Matteo)
HBASE-14866 VerifyReplication should use peer configuration in peer connection (Gary Helmling)
HBASE-14928 Start row should be set for query through HBase REST gateway involving globbing option
HBASE-15014 Fix filterCellByStore in WALsplitter is awful for performance (Elliott Clark)
HBASE-14432 Procedure V2 - enforce ACL on procedure admin tasks (Stephen Yuan Jiang)
HBASE-14488 Procedure V2 - shell command to abort a procedure (Stephen Yuan Jiang)
HBASE-14487 Procedure V2 - shell command to list all procedures (Stephen Yuan Jiang)
HBASE-14107 Procedure V2 - Administrative Task: Provide an API to List all procedures (Stephen Yuan Jiang)
HBASE-14108 Procedure V2 - Administrative Task: provide an API to abort a procedure (Stephen Yuan Jiang)
HBASE-14445 ExportSnapshot does not honor -chmod option
HBASE-13250 chown of ExportSnapshot does not cover all path and files (He Liangliang)
HBASE-14280 Bulk Upload from HA cluster to remote HA hbase cluster fails (Ankit Singhal)
HBASE-14497 Reverse Scan threw StackOverflow caused by readPt checking (Yerui Sun)
HBASE-14309 Allow load balancer to operate when there is region in transition by adding force flag
HBASE-14359 HTable#close will hang forever if unchecked error/exception thrown in AsyncProcess#sendMultiAction
HBASE-14342 Recursive call in RegionMergeTransactionImpl.getJournal()
HBASE-14314 Metrics for block cache should take region replicas into account
HBASE-13103 [ergonomics] add region size balancing as a feature of master (Mikhail Antonov)
HBASE-14367 Add normalization support to shell (Mikhail Antonov)
HBASE-14578 URISyntaxException during snapshot restore for table with user defined namespace
HBASE-14581 Znode cleanup throws auth exception in secure mode
HBASE-14565 Make ZK connection timeout configurable in MiniZooKeeperCluster
HBASE-14591 Region with reference hfile may split after a forced split in IncreasingToUpperBoundRegionSplitPolicy (Shaohui Liu)
HBASE-14361 ReplicationSink should create Connection instances lazily
HBASE-14621 ReplicationLogCleaner stuck on RS crash (Ashu)
HBASE-14624 BucketCache.freeBlock is too expensive
HBASE-14475 Region split requests are always audited with hbase user rather than request user
HBASE-14605 Split fails due to 'No valid credentials' error when SecureBulkLoadEndpoint#start tries to access hdfs
HBASE-14759 Avoid using Math.abs when selecting SyncRunner in FSHLog
HBASE-14268 Improve KeyLocker (Hiroshi Ikeda)
HBASE-14706 RegionLocationFinder should return multiple servernames by top host (Guanghao Zhang)
HBASE-14463 Severe performance downgrade when parallel reading a single key from BucketCache (Yu Li)
HBASE-14631 Region merge request should be audited with request user through proper scope of doAs() calls to region observer notifications
HBASE-14809 Grant / revoke Namespace admin permission to group
HBASE-14788 Splitting a region does not support the hbase.rs.evictblocksonclose config when closing source region
HBASE-14207 Region was hijacked and remained in transition when RS failed to open a region and later regionplan changed to new RS on retry (Pankaj Kumar)
HBASE-14885 NullPointerException in HMaster#normalizeRegions() due to missing TableDescriptor
HBASE-14893 Race between mutation on region and region closing operation leads to NotServingRegionException
HBASE-14799 Commons-collections object deserialization remote command execution vulnerability (Andrew Purtell)
HBASE-14632 Region server aborts due to unguarded dereference of Reader

HBASE-11658 Piped commands to hbase shell should return non-zero if shell command failed
HBASE-11940 Add utility scripts for snapshotting / restoring all tables in cluster
BUG-35784 Update httpcore version to 4.2.5
BUG-28682 HBase - Address Security Issues in Jetty 6.1.26
BUG-22418 Update jackson version to 1.9.13 
BUG-29025 Windows incompatibility with unicode (Chinese characters)

Following are the changes on top of Apache HBase 1.1.2
HBASE-14449 Rewrite deadlock prevention for concurrent connection close
HBASE-14258 Make region_mover.rb script case insensitive with regard to hostname
HBASE-14269 FuzzyRowFilter omits certain rows when multiple fuzzy key exist
HBASE-14313 After a Connection sees ConnectionClosingException it never recovers (Elliott Clark)
HBASE-14302 TableSnapshotInputFormat should not create back references when restoring snapshot
BUG-45027/BUG-45361 Fix hostname used with Kerberos on Dual-Homed clusters.
HBASE-14536 Balancer & SSH interfering with each other leading to unavailability
HBASE-14680 Two configs for snapshot timeout and better defaults
HBASE-14283 Reverse scan doesn’t work with HFile inline index/bloom blocks
HBASE-15221 Reload the cache on re-tried puts in HTableMultiplexer and adds a close() method to HTableMultiplexer
HBASE-15232 Handle region location cache mgmt in AsyncProcess for multi()'s
HBASE-15220 Change two logs in SimpleRegionNormalizer to INFO level
HBASE-14883 TestSplitTransactionOnCluster#testFailedSplit flakey
HBASE-14812 Fix ResultBoundedCompletionService deadlock (Elliott Clark)