Sub-task
- [HBASE-19275] - TestSnapshotFileCache never worked properly
- [HBASE-20317] - Backport HBASE-20261 "Table page (table.jsp) in Master UI does not show replicaIds for hbase meta table" to branch-1
- [HBASE-21061] - fix synchronization of org.apache.hadoop.hbase.ipc.RpcServer$Connection.useWrap
- [HBASE-21189] - flaky job should gather machine stats
- [HBASE-21190] - Log files and count of entries in each as we load from the MasterProcWAL store
Bug
- [HBASE-18451] - PeriodicMemstoreFlusher should inspect the queue before adding a delayed flush request
- [HBASE-18549] - Unclaimed replication queues can go undetected
- [HBASE-19418] - RANGE_OF_DELAY in PeriodicMemstoreFlusher should be configurable.
- [HBASE-20261] - Table page (table.jsp) in Master UI does not show replicaIds for hbase meta table
- [HBASE-20704] - Sometimes some compacted storefiles are not archived on region close
- [HBASE-20766] - Verify Replication Tool Has Typo "remove cluster"
- [HBASE-21030] - Correct javadoc for append operation
- [HBASE-21088] - HStoreFile should be closed in HStore#hasReferences
- [HBASE-21117] - Backport HBASE-18350 (fix RSGroups) to branch-1 (Only port the part fixing table locking issue.)
- [HBASE-21127] - TableRecordReader need to handle cursor result too
- [HBASE-21158] - Empty qualifier cell should not be returned if it does not match QualifierFilter
- [HBASE-21162] - Revert suspicious change to BoundedByteBufferPool and disable use of direct buffers for IPC reservoir by default
- [HBASE-21166] - Creating a CoprocessorHConnection re-retrieves the cluster id from ZK
- [HBASE-21173] - Remove the duplicate HRegion#close in TestHRegion
- [HBASE-21174] - [REST] Failed to parse empty qualifier in TableResource#getScanResource
- [HBASE-21179] - Fix the number of actions in responseTooSlow log
- [HBASE-21203] - TestZKMainServer#testCommandLineWorks won't pass with default 4lw whitelist
- [HBASE-21206] - Scan with batch size may return incomplete cells
- [HBASE-21212] - Wrong flush time when update flush metric
- [HBASE-21228] - Memory leak since AbstractFSWAL caches Thread object and never clean later
Improvement
- [HBASE-20307] - LoadTestTool prints too much zookeeper logging
- [HBASE-20734] - Colocate recovered edits directory with hbase.wal.dir
- [HBASE-20857] - JMX - add Balancer status = enabled / disabled
- [HBASE-21147] - (1.4) Add ability for HBase Canary to ignore a configurable number of ZooKeeper down nodes
- [HBASE-21207] - Add client side sorting functionality in master web UI for table and region server details.
Test
- [HBASE-21138] - Close HRegion instance at the end of every test in TestHRegion
- [HBASE-21258] - Add resetting of flags for RS Group pre/post hooks in TestRSGroups
- [HBASE-21261] - Add log4j.properties for hbase-rsgroup tests
Task
- [HBASE-21168] - BloomFilterUtil uses hardcoded randomness
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