HDP 2.2.6 provides Apache Hadoop Core 2.6.0 and the following additional Apache patches:
HDFS-3107: Introduce truncate.
HDFS-7009: Active NN and standby NN have different live nodes.
HDFS-7056: Snapshot support for truncate.
HDFS-7058: Tests for truncate CLI
HDFS-7263: Snapshot read can reveal future bytes for appended files.
HDFS-7425: NameNode block deletion logging uses incorrect appender.
HDFS-7443: Datanode upgrade to BLOCKID_BASED_LAYOUT fails if duplicate block files are present in the same volume
HDFS-7470: SecondaryNameNode need twice memory when calling reloadFromImageFile.
HDFS-7489: Incorrect locking in FsVolumeList#checkDirs can hang datanodes.
HDFS-7503: Namenode restart after large deletions can cause slow processReport
HDFS-7606: Fix potential NPE in INodeFile.getBlocks().
HDFS-7634: Disallow truncation of Lazy persist files.
HDFS-7638: Small fix and few refinements for FSN#truncate.
HDFS-7643: Test case to ensure lazy persist files cannot be truncated.
HDFS-7655: Expose truncate API for Web HDFS.
HDFS-7659: Truncate should check negative value of the new length
HDFS-7676: Fix TestFileTruncate to avoid bug of HDFS-7611.
HDFS-7677: DistributedFileSystem#truncate should resolve symlinks.
HDFS-7707: Edit log corruption due to delayed block removal again.
HDFS-7714: Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode.
HDFS-7733: NFS: readdir/readdirplus return null directory attribute on failure.
HDFS-7738: Revise the exception message for recover lease; add more truncate tests such as truncate with HA setup, negative tests, truncate with other operations and multiple truncates.
HDFS-7760: Document truncate for WebHDFS.
HDFS-7831. Fix the starting index and end condition of the loop in FileDiffList.findEarlierSnapshotBlocks().
HDFS-7843: A truncated file is corrupted after rollback from a rolling upgrade.
HDFS-7885: Datanode should not trust the generation stamp provided by client.
HADOOP-926: Do not fail job history iteration when encounting missing directories.
HADOOP-941: Addendum patch.
HADOOP-11321: copyToLocal cannot save a file to an SMB share unless the user has Full Control permissions.
HADOOP-11368: Fix SSLFactory truststore reloader thread leak in KMSClientProvider.
HADOOP-11381: Fix findbugs warnings in hadoop-distcp, hadoop-aws, hadoop-azure, and hadoop-openstack
HADOOP-11381: Revert. (Fix findbugs warnings in hadoop-distcp, hadoop-aws, hadoop-azure, and hadoop-openstack.)
HADOOP-11412: POMs mention "The Apache Software License" rather than "Apache License".
HADOOP-11412: Revert. (POMs mention "The Apache Software License" rather than "Apache License"
HADOOP-11490: Expose truncate API via FileSystem and shell command.
HADOOP-11509: change parsing sequence in GenericOptionsParser to parse -D parameters before -files.
HADOOP-11510: Expose truncate API via FileContext.
HADOOP-11523: StorageException complaining " no lease ID" when updating FolderLastModifiedTime in WASB.
HADOOP-11579: Documentation for truncate.
HADOOP-11595: Add default implementation for AbstractFileSystem#truncate.
MAPREDUCE-6230: Fixed RMContainerAllocator to update the new AMRMToken service name properly.
YARN-570: Time strings are formated in different timezone.
YARN-2246: Made the proxy tracking URL always be http(s)://proxy addr:port/proxy/<appId> to avoid duplicate sections.
YARN-2571: RM to support YARN registry
YARN-2683: registry config options: document and move to core-default
YARN-2837: Support TimeLine server to recover delegation token when restarting.
YARN-2917: Fixed potential deadlock when system.exit is called in AsyncDispatcher
YARN-2964: RM prematurely cancels tokens for jobs that submit jobs (oozie).
YARN-3103: AMRMClientImpl does not update AMRM token properly.
YARN-3207: Secondary filter matches entites which do not have the key being filtered for.
YARN-3227: Timeline renew delegation token fails when RM user's TGT is expired.
YARN-3239: WebAppProxy does not support a final tracking url which has query fragments and params.
YARN-3251: Fixed a deadlock in CapacityScheduler when computing absoluteMaxAvailableCapacity in LeafQueue.
YARN-3269: Yarn.nodemanager.remote-app-log-dir could not be configured to fully qualified path.
