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FB-CHANGES.txt
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Patches from the following Apache Jira issues have been applied
to this release in the order indicated. This is in addition to
the patches applied from issues referenced in CHANGES.txt.
Release 0.20.3 + FB - Unreleased.
MAPREDUCE-2349 speedup getSplits methods in inputformats.
MAPREDUCE-2218 schedule additional tasks when killactions are dispatched
MAPREDUCE-2162 handle stddev > mean
MAPREDUCE-2141 Add an "extra data" field to Task for use by Mesos
MAPREDUCE-2118 optimize getJobSetupAndCleanupTasks (by removing global lock - r9768)
MAPREDUCE-2157 taskLauncher threads in TT can die because of unexpected interrupts
MAPREDUCE-2116 optimize GetTasksToKill
MAPREDUCE-2114 finer grained locking for getCounters implementation
MAPREDUCE-2100 log split information for map task
MAPREDUCE-2085 job submissions to a tracker with different filesystem fails
MAPREDUCE-2062 speculative execution is too aggressive
MAPREDUCE-2047/2048. performance improvements in heartbeat processing
HDFS-1109. Fix url encoding with HFTP protocol
HDFS-1250. Namenode accepts block report from dead datanodes
MAPREDUCE-1442. Fixing JobHistory regular expression parsing
MAPREDUCE-1873. Add a metrics instrumentation class to collect
metrics about fair share scheduler
HDFS-1140 Speedup INode.getPathComponents
HDFS-1110 Namenode heap optimization
HADOOP-5124 A few optimizations to FsNamesystem#RecentInvalidateSets
HDFS-1295 Improve namenode restart times by short-circuiting
the first block reports from datanodes
HADOOP-6904 A baby step towards inter-version communications between
dfs client and NameNode
HDFS-1335 HDFS side of HADOOP-6904: first step towards inter-version
communications between dfs client and NameNode.
HDFS-1348 Improve NameNode reponsiveness while it is checking if
datanode decommissions are complete
HDFS-946 NameNode should not return full path name when listing
a directory or getting the status of a file.
MAPREDUCE-1463 Reducer should start faster for smaller jobs
HDFS-985 HDFS should issue multiple RPCs for listing a large
directory
HDFS-1368 Add a block counter to DatanodeDescriptor
MAPREDUCE-2046 CombineFileInputFormat should not create splits larger than
the specified maxSplitSize.
HDFS-202 Add a bulk FIleSystem.getFileBlockLocations
HADOOP-6870/6890/6900 Add FileSystem#listLocatedStatus to list a
directory's content together with each file's block
locations
MAPREDUCE-2021 CombineFileInputFormat returns
duplicate hostnames in split locations.
HDFS-173 Recursively deleting a directory with millions of files
makes NameNode unresponsive for other commands until the
deletion completes
HDFS-278 Add timeout to DFSOutputStream.close()
HDFS-1391 Reduce the time needed to exit safemode.
MAPREDUCE-1981 Improve getSplits performance by using listLocatedStatus,
the new FileSystem API
HDFS-96 integer overflow for blocks > 2GB (DFS client)
HADOOP-6975 integer overflow for blocks > 2GB (S3 client)
MAPREDUCE-1597 CombinefileInputformat does not work with non-splittable
files
HDFS-1429 Make lease expiration limit configurable
HADOOP-6974 Configurable header buffer size for Hadoop HTTP server
HDFS-1436 Lease renew RPC does not need to grab fsnamesytem write
lock
MAPREDUCE-2099 Purge Outdated RAID parity HARs.
MAPREDUCE-2108 Allow TaskScheduler manage number slots on TaskTrackers
(Here we use an alternative approach. We make TT read the
number of CPUs and change number of slots.)
MAPREDUCE-2110 add getArchiveIndex to HarFileSystem
MAPREDUCE-2111 make getPathInHar public in HarFileSystem
MAPREDUCE-961 ResourceAwareLoadManager to dynamically decide new tasks
based on current CPU/memory load on TaskTracker(s)
HDFS-1432 HDFS across data centers: HighTide
MAPREDUCE-2124 Add job counters for measuring time spent in three
different phases in reducers
MAPREDUCE-1819 RaidNode is now smarter in submitting RAID jobs.
MAPREDUCE-1894 Fixed a bug in DistributedRaidFileSystem.readFully() that
was causing it to loop infinitely.
MAPREDUCE-1838 Reduce the time needed for raiding a bunch of files
by randomly assigning files to map tasks.
MAPREDUCE-1670 RAID policies should not scan their own destination path.
MAPREDUCE-1668 RaidNode Hars a directory only if all its parity files
have been created.
MAPREDUCE-2029 DistributedRaidFileSystem removes itself from FileSystem
cache when it is closed.
MAPREDUCE-1816 HAR files used for RAID parity-bite have configurable
partfile size.
MAPREDUCE-1908 DistributedRaidFileSystem now handles ChecksumException
correctly.
MAPREDUCE-1783 Task Initialization should be delayed till when a job can
be run.
MAPREDUCE-2142 Refactor RaidNode to remove map reduce dependency.
HDFS-1463 accessTime updates should not occur in safeMode
HDFS-1435 Provide an option to store fsimage compressed
MAPREDUCE-2143 HarFileSystem should be able to handle spaces in its path.
HDFS-222 Support for concatenating of files into a single file.
MAPREDUCE-2150 RaidNode should periodically fix corrupt blocks
MAPREDUCE-2155 RaidNode should optionally dispatch map reduce jobs to fix
corrupt blocks (instead of fixing locally)
MAPREDUCE-2156 Raid-aware FSCK
HDFS-903 NN should verify images and edit los on startup
MAPREDUCE-1892 RaidNode can allow layered policies more efficiently.
HDFS-1458 Improve checkpoint performance by avoiding unncessary
image downloads & loading.
HDFS-1031 Enhance the webUi to list a few of the corrupted files
in HDFS
HDFS-1472 Refactor DFSck to allow programmatic access to output
HDFS-1111 Iterative listCorruptFilesBlocks() returns all corrupt
files.
HADOOP-7023 Add listCorruptFileBlocks to FileSystem.
HDFS-1482 Add listCorruptFileBlocks to DistributedFileSystem.
MAPREDUCE-2146 Raid does not affect access time of a source file.
HDFS-1457 Limit transmission rate when transfering image between
primary and secondary NNs
MAPREDUCE-2167 Faster directory traversal for RAID.
MAPREDUCE-2185 Infinite loop at creating splits using
CombineFileInputFormat
MAPREDUCE-2189 RAID Parallel traversal needs to synchronize stats
HDFS-1476 Configurable threshold for initializing replication queues
(before leaving safe mode).
HADOOP-7047 RPC client gets stuck
HADOOP-7013 Add field is Corrupt to BlockLocation.
HDFS-1483 Populate BlockLocation.isCorrupt in
DFSUtil.locatedBlocks2Locations.
HDFS-1458 Improve checkpoint performance by avoiding unnecessary
image downloads.
HADOOP-7001 Allow run-time configuration of configured nodes.
HADOOP-7049 Fixed TestReconfiguration.
MAPREDUCE-1752 HarFileSystem.getFileBlockLocations()
HDFS-1524 Image loader should make sure to read every byte in
image file
HDFS-1526 Dfs client name for a map/reduce task should have some
randomness
HADOOP-7060 A more elegant FileSystem#listCorruptFileBlocks API
HDFS-1533 A more elegant FileSystem#listCorruptFileBlocks API
MAPREDUCE-2215 A more elegant FileSystem#listCorruptFileBlocks API
HDFS-1477 Make NameNode Reconfigurable.
MAPREDUCE-2198 Allow FairScheduler to control the number of slots on each
TaskTracker
HDFS-1537 Add a metrics for tracking the number of reported
corrupt replicas
HDFS-1536 Improve HDFS WebUI
HDFS-1540 Make Datanode handle errors from namenode.register call elegantly
HADOOP-6148 Implement a pure Java CRC32 calculator
HADOOP-6166 Improve PureJavaCrc32
MAPREDUCE-782 Use PureJavaCrc32 in mapreduce spills
HDFS-1550 NPE when listing a file with no lcoation
HDFS-1553 Hftp file read should retry a different datanode if the
chosen best datanode fails to connect to NameNode
HDFS-1558 Optimize startFileInternal to do less calls to FSDir
HDFS-1508 Ability to do savenamespace without being in safemode
MAPREDUCE-2239 BlockPlacementPolicyRaid should call getBlockLocations
only when necessary
HDFS-1539 Prevent data loss when a cluster suffers a power loss
MAPREDUCE-2240 DistBlockFixer could sleep indefinitely.
HADOOP-4885 Do not try to restore failed replicas of Name Node storage (at checkpoint time)
HDFS-1541 Not marking datanodes dead When namenode in safemode
HADOOP-7088 JMX Bean that exposes version and build information
HADOOP-6609 UTF8 Fixed deadlock in RPC by replacing shared static
DataOutputBuffer in the UTF8 class with a thread local variable.
MAPREDUCE-2245 Failure metrics for block fixer.
HADOOP-6904 A baby step towards inter-version RPC communications.
HDFS-1335 HDFS side of HADOOP-6904.
MAPREDUCE-2263 MAP/REDUCE side of HADOOP-6904.
HDFS-1509 Resync discarded directories in fs.name.dir during saveNamespace command
MAPREDUCE-2275 RaidNode should monitor violations of block placement
MAPREDUCE-2248 DistributedRaidFileSystem unraids only the corrupt block.
HDFS-1578 First step towards data transter protocol compatibility:
a new RPC for fetching data transfer protocol version
MAPREDUCE-1818 Generalize dist raid scheduler options.
MAPREDUCE-2274 Generalize block fixer scheduler options.
MAPREDUCE-2279 Improper byte -> int conversion in DistributedRaidFileSystem
HDFS-1577 Fall back to a random datanode when bestNode fails.
MAPREDUCE-2292 Provide a shell interface for querying the status of FairScheduler
MAPREDUCE-2267 RAID code can now read blocks streams in parallel.
MAPREDUCE-2302 Add static factory methods in GaloisField
HDFS-270 Datanode upgrade should process dfs.data.dirs in parallel.
MAPREDUCE-2312 Better error handling in RaidShell.
MAPREDUCE-2313 Raid code closes open streams.
HDFS-1601 Pipeline ACKs are sent as lots of tiny TCP packets.
HDFS-1443 Batch the calls in DataStorage to FileUtil.createHardLink()
HADOOP-6833 IPC leaks call parameters when exceptions thrown.
HDFS-1622 Update TestDFSUpgradeFromImage to test batch hardlink improvement.
HDFS-1614 Provide an option to saveNamespace to save namespace uncompressed.
MAPREDUCE-2320 RAID DistBlockFixer should limit pending jobs.
HDFS-1627 Fix NPE in SNN.
MAPREDUCE-2329 RAID BlockFixer should excluded tmp files.
MAPREDUCE-2347 RAID blockfixer should check file blocks after the file is
fixed
HADOOP-7159 RPC server should log the client hostname when read
exception happened
MAPREDUCE-2352 RAID blockfixer can use a heuristic to find unfixable
files
MAPREDUCE-2368 RAID DFS should handle zero-length files.
HADOOP-7165 ListLocatedStatus(path, filter) is not redefined in FilterFs
HDFS-1764 Add 'Time Since Declared Dead' to namenode dead datanodes
web page.
HDFS-1766 Datanode is marked dead, but datanode process is alive and
verifying blocks.
HDFS-1775 FSNamesystem.readLock should be held while doing getContentSummary
HDFS-1776 Bug in concat code.
HDFS-1780 Make saving the fsimage on startup configurable
HDFS-1446 Refactor the start-time Directory Tree and Replicas Map
constructors to share data and run volume-parallel
HDFS-1796 Switch NameNode to use non-fair locks.
MAPREDUCE-2257 distcp can now copy file by chunks
HDFS-1172 Blocks in newly completed files are considered under
replicated too quickly
HDFS-1803 Display progress of the fsimage loading
HDFS-1506 Refactor fsimage loading code
HDFS-1070 Speedup namenode image loading and saving by storing
only local file names
MAPREDUCE-2436 RAID block fixer should prioritize block fix operations
HDFS-1765 Block Replication should respect under-replication
block priority.
MAPREDUCE-2442 ADD a JSP page for RaidNode
MAPREDUCE-2185 CombineFileInputFormat should handle missing blocks
HDFS-1767 Namenode should ignore non-initial block reports from
datanodes when in safemode during startup
HDFS-1826 NameNode should save image to name directories in parallel
during upgrade
HDFS-78 Eliminate redundant searches in namespace directory tree
HDFS-1846 Don't fill preallocated portion of edits log with 0x00
MAPREDUCE-2570 Use the correct filesystem when creating temporary file in
RAID FS.
MAPREDUCE-2577 Improved Raid FS skip() performance.
HDFS-1667 Consider redesign of block report processing
HDFS-955 Fix Edits log/Save FSImage bugs
HADOOP-6683 the first optimization: ZlibCompressor does not fully utilize the buffer
HADOOP-7111 Several TFile tests failing when native libraries are present