<!--- # Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. -->

Apache Hadoop Changelog

Release 0.20.3 - Unreleased (as of 2018-09-01)

INCOMPATIBLE CHANGES:

JIRA	Summary	Priority	Component	Reporter	Contributor
HADOOP-6382	publish hadoop jars to apache mvn repo.	Major	build	Giridharan Kesavan	Giridharan Kesavan
HDFS-132	Namenode in Safemode reports to Simon non-zero number of deleted files during startup	Minor	namenode	Hairong Kuang	Suresh Srinivas
HADOOP-6701	Incorrect exit codes for "dfs -chown", "dfs -chgrp"	Minor	fs	Ravi Phulari	Ravi Phulari

IMPROVEMENTS:

JIRA	Summary	Priority	Component	Reporter	Contributor
MAPREDUCE-1832	Support for file sizes less than 1MB in DFSIO benchmark.	Major	benchmarks	Konstantin Shvachko	Konstantin Shvachko
HADOOP-7240	Update eclipse .classpath template	Major	.	Aaron T. Myers	Aaron T. Myers
MAPREDUCE-1734	Un-deprecate the old MapReduce API in the 0.20 branch	Blocker	documentation	Tom White	Todd Lipcon
HDFS-1013	Miscellaneous improvements to HTML markup for web UIs	Minor	.	Todd Lipcon	Eugene Koontz
HADOOP-6882	Update the patch level of Jetty	Major	.	Owen O'Malley	Owen O'Malley

BUG FIXES:

JIRA	Summary	Priority	Component	Reporter	Contributor
HDFS-15	Rack replication policy can be violated for over replicated blocks	Critical	.	Hairong Kuang	Jitendra Nath Pandey
MAPREDUCE-1522	FileInputFormat may change the file system of an input path	Blocker	.	Tsz Wo Nicholas Sze	Tsz Wo Nicholas Sze
MAPREDUCE-1407	Invalid example in the documentation of org.apache.hadoop.mapreduce.{Mapper,Reducer}	Trivial	documentation	Benoit Sigoure	Benoit Sigoure
HDFS-955	FSImage.saveFSImage can lose edits	Blocker	namenode	Todd Lipcon	Konstantin Shvachko
HDFS-1041	DFSClient does not retry in getFileChecksum(..)	Major	hdfs-client	Tsz Wo Nicholas Sze	Tsz Wo Nicholas Sze
HDFS-909	Race condition between rollEditLog or rollFSImage ant FSEditsLog.write operations corrupts edits log	Blocker	namenode	Cosmin Lehene	Todd Lipcon
HADOOP-6702	Incorrect exit codes for "dfs -chown", "dfs -chgrp" when input is given in wildcard format.	Minor	fs	Ravi Phulari	Ravi Phulari
HADOOP-6760	WebServer shouldn't increase port number in case of negative port setting caused by Jetty's race	Major	.	Konstantin Boudnik	Konstantin Boudnik
MAPREDUCE-1372	ConcurrentModificationException in JobInProgress	Blocker	jobtracker	Amareshwari Sriramadasu	Dick King
MAPREDUCE-118	Job.getJobID() will always return null	Blocker	client	Amar Kamat	Amareshwari Sriramadasu
MAPREDUCE-1880	"java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result." while running "hadoop jar hadoop-0.20.1+169.89-examples.jar pi 4 30"	Minor	examples	Victor Pakhomov	Tsz Wo Nicholas Sze
HDFS-1258	Clearing namespace quota on "/" corrupts FS image	Blocker	namenode	Aaron T. Myers	Aaron T. Myers
HADOOP-6881	The efficient comparators aren't always used except for BytesWritable and Text	Major	.	Owen O'Malley	Owen O'Malley
HADOOP-6833	IPC leaks call parameters when exceptions thrown	Blocker	.	Todd Lipcon	Todd Lipcon
HADOOP-6928	Fix BooleanWritable comparator in 0.20	Major	io	Owen O'Malley	Johannes Zillmann
HDFS-1404	TestNodeCount logic incorrect in branch-0.20	Minor	namenode, test	Todd Lipcon	Todd Lipcon
MAPREDUCE-1280	Eclipse Plugin does not work with Eclipse Ganymede (3.4)	Major	.	Aaron Kimball	Alex Kozlov
HADOOP-6724	IPC doesn't properly handle IOEs thrown by socket factory	Major	ipc	Todd Lipcon	Todd Lipcon
HDFS-1240	TestDFSShell failing in branch-20	Critical	test	Todd Lipcon	Todd Lipcon
HDFS-727	bug setting block size hdfsOpenFile	Blocker	libhdfs	Eli Collins	Eli Collins
HDFS-908	TestDistributedFileSystem fails with Wrong FS on weird hosts	Minor	test	Todd Lipcon	Todd Lipcon
HDFS-1377	Quota bug for partial blocks allows quotas to be violated	Blocker	namenode	Eli Collins	Eli Collins
HDFS-1406	TestCLI fails on Ubuntu with default /etc/hosts	Minor	.	Todd Lipcon	Konstantin Boudnik
MAPREDUCE-2262	Capacity Scheduler unit tests fail with class not found	Major	capacity-sched	Owen O'Malley	Owen O'Malley
HADOOP-6923	Native Libraries do not load if a different platform signature is returned from org.apache.hadoop.util.PlatformName	Major	native	Stephen Watt	Stephen Watt
HDFS-1543	Reduce dev. cycle time by moving system testing artifacts from default build and push to maven for HDFS	Major	.	Arun C Murthy	Luke Lu
HDFS-1836	Thousand of CLOSE_WAIT socket	Major	hdfs-client	Dennis Cheung	Bharath Mundlapudi
HADOOP-7116	raise contrib junit test jvm memory size to 512mb	Major	test	Owen O'Malley	Owen O'Malley

TESTS:

JIRA	Summary	Priority	Component	Reporter	Contributor
HADOOP-6637	Benchmark overhead of RPC session establishment	Major	benchmarks	Konstantin Shvachko	Konstantin Shvachko

OTHER:

JIRA	Summary	Priority	Component	Reporter	Contributor
HDFS-1286	Dry entropy pool on Hudson boxes causing test timeouts	Major	test	Todd Lipcon	Konstantin Boudnik
HADOOP-7372	Remove ref of 20.3 release from branch-0.20 CHANGES.txt	Major	documentation	Eli Collins	Eli Collins