Bulk Operation

HDFS-5535 SimulatedDataSet should not create DatanodeRegistration with namenode layout version and type

HDFS-5535 NameNode should not check DataNode layout version

HDFS-5535 Fix rolling upgrade documentation and error messges

HDFS-5535 Downgrade/Finalize should rename the rollback image instead of purging it

HDFS-5535 Allow JournalNode to handle editlog produced by new release with future layoutversion

HDFS-5535 DN registration should use DataNodeLayoutVersion instead of NameNodeLayoutVersion

HDFS-5535 -rollingUpgrade query hits NPE after the NN restarts

HDFS-5535 NN running newer software rejects loading the fsimage during rolling upgrade.

HDFS-5535 Secondary NN fails to checkpoint after -rollingUpgrade prepare

HDFS-5535 Fix TestDFSUpgrade and TestDataNodeRollingUpgrade

HDFS-5535 Test whether the NN will reject the downgrade if it has a fsimage from a newer release

HDFS-5535 Test whether the standby NN continues to checkpoint after the prepare stage

HDFS-5535 Fix the five findbugs warnings

HDFS-5535 Standby NN might not checkpoint when processing the rolling upgrade marker

HDFS-5535 Query the status of rolling upgrade in the preparation stage in TestRollingUpgrade and TestRollingUpgradeRollback

HDFS-5535 Update datanode replacement policy to make writes more robust

HDFS-5535 Fix TestBlockRecovery#testRaceBetweenReplicaRecoveryAndFinalizeBlock

HDFS-5535 Fix findbug warnings introduced by HDFS-5583

HDFS-5535 add rollingUpgrade information to latest UI

HDFS-5535 Simplify Datanode rollback and downgrade

HDFS-5535 Change DFSAdmin for rolling upgrade commands

HDFS-5535 Add '-rollingUpgrade <rollback|downgrade>' to namenode usage message

HDFS-5535 Avoid saving namespace when starting rolling upgrade

HDFS-5535 Do not create rollback fsimage when it already exists

HDFS-5535 Fix TestDataNodeRollingUpgrade failure

HDFS-5535 Fix TestOfflineEditsViewer and NPE in MD5FileUtils

HDFS-5535 Fix findbugs warnings in Rolling Upgrade branch

HDFS-5535 SimulatedFSDataset#disableAndPurgeTrashStorage should not throw UnsupportedOperationException

HDFS-5535 Fix TestEditLog and TestStandbyCheckpoints

HDFS-5535 Rollback does not need to load edits

HDFS-5535 Create unit tests for downgrade and finalize

HDFS-5535 Fix compilation error after merge

HDFS-5535 Fix rollback of rolling upgrade in NameNode HA setup

HDFS-5535 Fix rollback of rolling upgrade in NameNode HA setup

HDFS-5535 TestRollingUpgrade#testSecondaryNameNode causes subsequent tests to fail

HDFS-5535 Fix TestRollingUpgrade

HDFS-5535 Merge Protobuf-based-FSImage code from trunk

HDFS-5535 Add rolling upgrade information to fsimage

HDFS-5535 Utilize OOB upgrade message processing for writes

HDFS-5535 Support rollback of rolling upgrade in NameNode and JournalNodes

HDFS-5535 BlockPoolSliceStorage trash to handle block deletions during rolling upgrade

HDFS-5535 Upgrade and rolling upgrade should not be allowed simultaneously

HDFS-5535 Avoid NPE in Datanode heartbeat

HDFS-5535 When rolling upgrade is in progress, standby NN should create checkpoint for downgrade.

HDFS-5535 Should not compare DataNode current layout version with that of NameNode in DataStrorage

HDFS-5535 When rolling upgrade is in progress, NN should only create checkpoint right before the upgrade marker

HDFS-5535 Reading edits should not stop at UpgradeMarker for normal restart of the namenode

HDFS-5535 Add rolling upgrade infomation to heartbeat response

HDFS-5535 Add a new option for starting standby NN when rolling upgrade is in progress

HDFS-5535 Support query and finalize rolling upgrade

HDFS-5535 Document new commands and parameters for improved rolling upgrades

HDFS-5535 Split LayoutVerion into NamenodeLayoutVersion and DatanodeLayoutVersion

HDFS-5535 Add new NN startup options for downgrade and rollback using upgrade marker

HDFS-5535 Add a new DFSAdminCommand for rolling upgrade

HDFS-5535 Support upgrade marker in editlog streams

HDFS-5535 Add quick-restart option for datanode

HDFS-5535 Provide admin commands for data node upgrade

HDFS-5535 Add OOB upgrade response and client-side logic for reads

HDFS-5535 Make DN send an OOB Ack on shutdown before restarting

HDFS-5535 Improve datanode startup time

HDFS-5535 Make replication queue initialization asynchronous

HDFS-5535 Consider supporting a mechanism to allow datanodes to drain outstanding work during rolling upgrade

HDFS-5535 Revist upgrade snapshots, roll back, finalize to enable rolling upgrades