##### General

- Overview
- Single Node Setup
- Cluster Setup
- Commands Reference
- FileSystem Shell
- Compatibility Specification
- Downstream Developer's Guide
- Admin Compatibility Guide
- Interface Classification
- FileSystem Specification

##### Common

- CLI Mini Cluster
- Native Libraries
- Proxy User
- Rack Awareness
- Secure Mode
- Service Level Authorization
- HTTP Authentication
- Credential Provider API
- Hadoop KMS
- Tracing
- Unix Shell Guide

##### HDFS

- Architecture
- User Guide
- Commands Reference
- NameNode HA With QJM
- NameNode HA With NFS
- Observer NameNode
- Federation
- ViewFs
- ViewFsOverloadScheme
- Snapshots
- Edits Viewer
- Image Viewer
- Permissions and HDFS
- Quotas and HDFS
- libhdfs (C API)
- WebHDFS (REST API)
- HttpFS
- Short Circuit Local Reads
- Centralized Cache Management
- NFS Gateway
- Rolling Upgrade
- Extended Attributes
- Transparent Encryption
- Multihoming
- Storage Policies
- Memory Storage Support
- Synthetic Load Generator
- Erasure Coding
- Disk Balancer
- Upgrade Domain
- DataNode Admin
- Router Federation
- Provided Storage

##### MapReduce

- Tutorial
- Commands Reference
- Compatibility with 1.x
- Encrypted Shuffle
- Pluggable Shuffle/Sort
- Distributed Cache Deploy
- Support for YARN Shared Cache

##### MapReduce REST APIs

- MR Application Master
- MR History Server

##### YARN

- Architecture
- Commands Reference
- Capacity Scheduler
- Fair Scheduler
- ResourceManager Restart
- ResourceManager HA
- Resource Model
- Node Labels
- Node Attributes
- Web Application Proxy
- Timeline Server
- Timeline Service V.2
- Writing YARN Applications
- YARN Application Security
- NodeManager
- Running Applications in Docker Containers
- Using CGroups
- Secure Containers
- Registry
- Reservation System
- Graceful Decommission
- Opportunistic Containers
- YARN Federation
- Shared Cache
- Using GPU
- Using FPGA
- Placement Constraints
- YARN UI2

##### YARN REST APIs

- Introduction
- Resource Manager
- Node Manager
- Timeline Server
- Timeline Service V.2

##### YARN Service

- Overview
- QuickStart
- Concepts
- Yarn Service API
- Service Discovery
- System Services

##### Submarine

- Index
- QuickStart
- Examples

##### Hadoop Compatible File Systems

- Aliyun OSS
- Amazon S3
- Azure Blob Storage
- Azure Data Lake Storage
- OpenStack Swift

##### Auth

- Overview
- Examples
- Configuration
- Building

##### Tools

- Hadoop Streaming
- Hadoop Archives
- Hadoop Archive Logs
- DistCp
- GridMix
- Rumen
- Resource Estimator Service
- Scheduler Load Simulator
- Hadoop Benchmarking

##### Reference

- Changelog and Release Notes
- Java API docs
- Unix Shell API
- Metrics

##### Configuration

- core-default.xml
- hdfs-default.xml
- hdfs-rbf-default.xml
- mapred-default.xml
- yarn-default.xml
- kms-default.xml
- httpfs-default.xml
- Deprecated Properties

# Apache Hadoop Changelog

## Release 3.0.1 - 2018-03-25

### INCOMPATIBLE CHANGES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HDFS-12990 | Change default NameNode RPC port back to 8020 | Critical | namenode | Xiao Chen | Xiao Chen

### IMPORTANT ISSUES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HDFS-13083 | RBF: Fix doc error setting up client | Major | federation | tartarus | tartarus

### IMPROVEMENTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-14872 | CryptoInputStream should implement unbuffer | Major | fs, security | John Zhuge | John Zhuge
YARN-7414 | FairScheduler#getAppWeight() should be moved into FSAppAttempt#getWeight() | Minor | fairscheduler | Daniel Templeton | Soumabrata Chakraborty
HADOOP-15023 | ValueQueue should also validate (lowWatermark * numValues) > 0 on construction | Minor | . | Xiao Chen | Xiao Chen
HDFS-12814 | Add blockId when warning slow mirror/disk in BlockReceiver | Trivial | hdfs | Jiandan Yang | Jiandan Yang
YARN-7524 | Remove unused FairSchedulerEventLog | Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg
YARN-7495 | Improve robustness of the AggregatedLogDeletionService | Major | log-aggregation | Jonathan Eagles | Jonathan Eagles
YARN-7611 | Node manager web UI should display container type in containers page | Major | nodemanager, webapp | Weiwei Yang | Weiwei Yang
YARN-6483 | Add nodes transitioning to DECOMMISSIONING state to the list of updated nodes returned to the AM | Major | resourcemanager | Juan Rodríguez Hortalá | Juan Rodríguez Hortalá
HADOOP-15056 | Fix TestUnbuffer#testUnbufferException failure | Minor | test | Jack Bearden | Jack Bearden
HADOOP-15012 | Add readahead, dropbehind, and unbuffer to StreamCapabilities | Major | fs | John Zhuge | John Zhuge
HADOOP-15104 | AliyunOSS: change the default value of max error retry | Major | fs/oss | wujinhu | wujinhu
HDFS-12910 | Secure Datanode Starter should log the port when it fails to bind | Minor | datanode | Stephen O’Donnell | Stephen O’Donnell
HDFS-12819 | Setting/Unsetting EC policy shows warning if the directory is not empty | Minor | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
HDFS-12927 | Update erasure coding doc to address unsupported APIs | Major | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
YARN-5418 | When partial log aggregation is enabled, display the list of aggregated files on the container log page | Major | . | Siddharth Seth | Xuan Gong
HDFS-12818 | Support multiple storages in DataNodeCluster / SimulatedFSDataset | Minor | datanode, test | Erik Krogen | Erik Krogen
HDFS-9023 | When NN is not able to identify DN for replication, reason behind it can be logged | Critical | hdfs-client, namenode | Surendra Singh Lilhore | Xiao Chen
HDFS-11847 | Enhance dfsadmin listOpenFiles command to list files blocking datanode decommissioning | Major | hdfs | Manoj Govindassamy | Manoj Govindassamy
YARN-7678 | Ability to enable logging of container memory stats | Major | nodemanager | Jim Brennan | Jim Brennan
HDFS-11848 | Enhance dfsadmin listOpenFiles command to list files under a given path | Major | . | Manoj Govindassamy | Yiqun Lin
HDFS-12945 | Switch to ClientProtocol instead of NamenodeProtocols in NamenodeWebHdfsMethods | Minor | . | Wei Yan | Wei Yan
YARN-7590 | Improve container-executor validation check | Major | security, yarn | Eric Yang | Eric Yang
MAPREDUCE-6984 | MR AM to clean up temporary files from previous attempt in case of no recovery | Major | applicationmaster | Gergo Repas | Gergo Repas
HADOOP-15185 | Update adls connector to use the current version of ADLS SDK | Major | fs/adl | Atul Sikaria | Atul Sikaria
HADOOP-15189 | backport HADOOP-15039 to branch-2 and branch-3 | Blocker | . | Genmao Yu | Genmao Yu
HADOOP-15186 | Allow Azure Data Lake SDK dependency version to be set on the command line | Major | build, fs/adl | Vishwajeet Dusane | Vishwajeet Dusane
HDFS-13092 | Reduce verbosity for ThrottledAsyncChecker.java:schedule | Minor | datanode | Mukul Kumar Singh | Mukul Kumar Singh
HADOOP-15212 | Add independent secret manager method for logging expired tokens | Major | security | Daryn Sharp | Daryn Sharp
YARN-7728 | Expose container preemptions related information in Capacity Scheduler queue metrics | Major | . | Eric Payne | Eric Payne
MAPREDUCE-7048 | Uber AM can crash due to unknown task in statusUpdate | Major | mr-am | Peter Bacsko | Peter Bacsko
HADOOP-15204 | Add Configuration API for parsing storage sizes | Minor | conf | Anu Engineer | Anu Engineer

### BUG FIXES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-7361 | Improve the docker container runtime documentation | Major | . | Shane Kumpf | Shane Kumpf
YARN-7489 | ConcurrentModificationException in RMAppImpl#getRMAppMetrics | Major | capacityscheduler | Tao Yang | Tao Yang
YARN-7525 | Incorrect query parameters in cluster nodes REST API document | Minor | documentation | Tao Yang | Tao Yang
HADOOP-15046 | Document Apache Hadoop does not support Java 9 in BUILDING.txt | Major | documentation | Akira Ajisaka | Hanisha Koneru
YARN-7531 | ResourceRequest.equal does not check ExecutionTypeRequest.enforceExecutionType() | Major | api | Haibo Chen | Haibo Chen
YARN-7513 | Remove scheduler lock in FSAppAttempt.getWeight() | Minor | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg
YARN-7390 | All reservation related test cases failed when TestYarnClient runs against Fair Scheduler. | Major | fairscheduler, reservation system | Yufei Gu | Yufei Gu
YARN-7363 | ContainerLocalizer doesn’t have a valid log4j config when using LinuxContainerExecutor | Major | nodemanager | Yufei Gu | Yufei Gu
HDFS-12832 | INode.getFullPathName may throw ArrayIndexOutOfBoundsException lead to NameNode exit | Critical | namenode | DENG FEI | Konstantin Shvachko
HADOOP-15042 | Azure PageBlobInputStream.skip() can return negative value when numberOfPagesRemaining is 0 | Minor | fs/azure | Rajesh Balamohan | Rajesh Balamohan
YARN-7558 | “yarn logs” command fails to get logs for running containers if UI authentication is enabled. | Critical | . | Namit Maheshwari | Xuan Gong
HDFS-12638 | Delete copy-on-truncate block along with the original block, when deleting a file being truncated | Blocker | hdfs | Jiandan Yang | Konstantin Shvachko
HDFS-12836 | startTxId could be greater than endTxId when tailing in-progress edit log | Major | hdfs | Chao Sun | Chao Sun
MAPREDUCE-5124 | AM lacks flow control for task events | Major | mr-am | Jason Lowe | Peter Bacsko
YARN-7589 | TestPBImplRecords fails with NullPointerException | Major | . | Jason Lowe | Daniel Templeton
YARN-7455 | quote_and_append_arg can overflow buffer | Major | nodemanager | Jason Lowe | Jim Brennan
HADOOP-15058 | create-release site build outputs dummy shaded jars due to skipShade | Blocker | . | Andrew Wang | Andrew Wang
HADOOP-14985 | Remove subversion related code from VersionInfoMojo.java | Minor | build | Akira Ajisaka | Ajay Kumar
HADOOP-15098 | TestClusterTopology#testChooseRandom fails intermittently | Major | test | Zsolt Venczel | Zsolt Venczel
HDFS-12891 | Do not invalidate blocks if toInvalidate is empty | Major | . | Zsolt Venczel | Zsolt Venczel
YARN-7647 | NM print inappropriate error log when node-labels is enabled | Minor | . | Yang Wang | Yang Wang
HDFS-12907 | Allow read-only access to reserved raw for non-superusers | Major | namenode | Daryn Sharp | Rushabh S Shah
HDFS-12881 | Output streams closed with IOUtils suppressing write errors | Major | . | Jason Lowe | Ajay Kumar
YARN-7595 | Container launching code suppresses close exceptions after writes | Major | nodemanager | Jason Lowe | Jim Brennan
HADOOP-15085 | Output streams closed with IOUtils suppressing write errors | Major | . | Jason Lowe | Jim Brennan
YARN-7629 | TestContainerLaunch# fails after YARN-7381 | Major | . | Jason Lowe | Jason Lowe
YARN-7664 | Several javadoc errors | Blocker | . | Sean Mackrory | Sean Mackrory
HADOOP-15123 | KDiag tries to load krb5.conf from KRB5CCNAME instead of KRB5_CONFIG | Minor | security | Vipin Rathor | Vipin Rathor
YARN-7661 | NodeManager metrics return wrong value after update node resource | Major | . | Yang Wang | Yang Wang
HDFS-12347 | TestBalancerRPCDelay#testBalancerRPCDelay fails very frequently | Critical | test | Xiao Chen | Bharat Viswanadham
HDFS-12930 | Remove the extra space in HdfsImageViewer.md | Trivial | documentation | Yiqun Lin | Rahul Pathak
YARN-7662 | [Atsv2] Define new set of configurations for reader and collectors to bind. | Major | . | Rohith Sharma K S | Rohith Sharma K S
HDFS-12845 | JournalNode Test failures | Major | journal-node | Bharat Viswanadham | Bharat Viswanadham
YARN-7466 | ResourceRequest has a different default for allocationRequestId than Container | Major | . | Chandni Singh | Chandni Singh
YARN-7674 | Update Timeline Reader web app address in UI2 | Major | . | Rohith Sharma K S | Sunil Govindan
HDFS-12938 | TestErasureCodigCLI testAll failing consistently. | Major | erasure-coding, hdfs | Rushabh S Shah | Ajay Kumar
YARN-7542 | Fix issue that causes some Running Opportunistic Containers to be recovered as PAUSED | Major | . | Arun Suresh | Sampada Dehankar
HDFS-12915 | Fix findbugs warning in INodeFile$HeaderFormat.getBlockLayoutRedundancy | Major | namenode | Wei-Chiu Chuang | Chris Douglas
HADOOP-15122 | Lock down version of doxia-module-markdown plugin | Blocker | . | Elek, Marton | Elek, Marton
HADOOP-15143 | NPE due to Invalid KerberosTicket in UGI | Major | . | Jitendra Nath Pandey | Mukul Kumar Singh
YARN-7692 | Skip validating priority acls while recovering applications | Blocker | resourcemanager | Charan Hebri | Sunil Govindan
MAPREDUCE-7028 | Concurrent task progress updates causing NPE in Application Master | Blocker | mr-am | Gergo Repas | Gergo Repas
YARN-7602 | NM should reference the singleton JvmMetrics instance | Major | nodemanager | Haibo Chen | Haibo Chen
HDFS-12913 | TestDNFencingWithReplication.testFencingStress fix mini cluster not yet active issue | Major | . | Zsolt Venczel | Zsolt Venczel
HDFS-12860 | StripedBlockUtil#getRangesInternalBlocks throws exception for the block group size larger than 2GB | Major | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
YARN-7619 | Max AM Resource value in Capacity Scheduler UI has to be refreshed for every user | Major | capacity scheduler, yarn | Eric Payne | Eric Payne
YARN-7699 | queueUsagePercentage is coming as INF for getApp REST api call | Major | webapp | Sunil Govindan | Sunil Govindan
HDFS-12985 | NameNode crashes during restart after an OpenForWrite file present in the Snapshot got deleted | Major | hdfs | Manoj Govindassamy | Manoj Govindassamy
YARN-7508 | NPE in FiCaSchedulerApp when debug log enabled in async-scheduling mode | Major | capacityscheduler | Tao Yang | Tao Yang
YARN-7663 | RMAppImpl:Invalid event: START at KILLED | Major | resourcemanager | lujie | lujie
YARN-6948 | Invalid event: ATTEMPT_ADDED at FINAL_SAVING | Major | yarn | lujie | lujie
HDFS-12994 | TestReconstructStripedFile.testNNSendsErasureCodingTasks fails due to socket timeout | Major | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
YARN-7665 | Allow FS scheduler state dump to be turned on/off separately from FS debug log | Major | . | Wilfred Spiegelenburg | Wilfred Spiegelenburg
HADOOP-15060 | TestShellBasedUnixGroupsMapping.testFiniteGroupResolutionTime flaky | Major | . | Miklos Szegedi | Miklos Szegedi
YARN-7735 | Fix typo in YARN documentation | Minor | documentation | Takanobu Asanuma | Takanobu Asanuma
YARN-7727 | Incorrect log levels in few logs with QueuePriorityContainerCandidateSelector | Minor | yarn | Prabhu Joseph | Prabhu Joseph
HDFS-11915 | Sync rbw dir on the first hsync() to avoid file lost on power failure | Critical | . | Kanaka Kumar Avvaru | Vinayakumar B
YARN-7705 | Create the container log directory with correct sticky bit in C code | Major | nodemanager | Yufei Gu | Yufei Gu
YARN-7479 | TestContainerManagerSecurity.testContainerManager[Simple] flaky in trunk | Major | test | Botong Huang | Akira Ajisaka
HDFS-13004 | TestLeaseRecoveryStriped#testLeaseRecovery is failing when safeLength is 0MB or larger than the test file | Major | hdfs | Zsolt Venczel | Zsolt Venczel
HDFS-9049 | Make Datanode Netty reverse proxy port to be configurable | Major | datanode | Vinayakumar B | Vinayakumar B
YARN-7758 | Add an additional check to the validity of container and application ids passed to container-executor | Major | nodemanager | Miklos Szegedi | Yufei Gu
HADOOP-15150 | in FsShell, UGI params should be overidden through env vars(-D arg) | Major | . | Brahma Reddy Battula | Brahma Reddy Battula
HADOOP-15166 | CLI MiniCluster fails with ClassNotFoundException o.a.h.yarn.server.timelineservice.collector.TimelineCollectorManager | Major | . | Gera Shegalov | Gera Shegalov
HDFS-13039 | StripedBlockReader#createBlockReader leaks socket on IOException | Critical | datanode, erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
HADOOP-15181 | Typo in SecureMode.md | Trivial | documentation | Masahiro Tanaka | Masahiro Tanaka
YARN-7796 | Container-executor fails with segfault on certain OS configurations | Major | nodemanager | Gergo Repas | Gergo Repas
YARN-7806 | Distributed Shell should use timeline async api’s | Major | distributed-shell | Sumana Sathish | Rohith Sharma K S
HADOOP-15121 | Encounter NullPointerException when using DecayRpcScheduler | Major | . | Tao Jie | Tao Jie
MAPREDUCE-7015 | Possible race condition in JHS if the job is not loaded | Major | jobhistoryserver | Peter Bacsko | Peter Bacsko
YARN-7737 | prelaunch.err file not found exception on container failure | Major | . | Jonathan Hung | Keqiu Hu
HDFS-13063 | Fix the incorrect spelling in HDFSHighAvailabilityWithQJM.md | Trivial | documentation | Jianfei Jiang | Jianfei Jiang
YARN-7102 | NM heartbeat stuck when responseId overflows MAX_INT | Critical | . | Botong Huang | Botong Huang
MAPREDUCE-7041 | MR should not try to clean up at first job attempt | Major | . | Takanobu Asanuma | Gergo Repas
HDFS-13054 | Handling PathIsNotEmptyDirectoryException in DFSClient delete call | Major | hdfs-client | Nanda kumar | Nanda kumar
MAPREDUCE-7020 | Task timeout in uber mode can crash AM | Major | mr-am | Akira Ajisaka | Peter Bacsko
YARN-7765 | [Atsv2] GSSException: No valid credentials provided - Failed to find any Kerberos tgt thrown by Timelinev2Client & HBaseClient in NM | Blocker | . | Sumana Sathish | Rohith Sharma K S
HDFS-13065 | TestErasureCodingMultipleRacks#testSkewedRack3 is failing | Major | hdfs | Gabor Bota | Gabor Bota
HDFS-12974 | Exception message is not printed when creating an encryption zone fails with AuthorizationException | Minor | encryption | fang zhenyi | fang zhenyi
YARN-7698 | A misleading variable’s name in ApplicationAttemptEventDispatcher | Minor | resourcemanager | Jinjiang Ling | Jinjiang Ling
YARN-7790 | Improve Capacity Scheduler Async Scheduling to better handle node failures | Critical | . | Sumana Sathish | Wangda Tan
HDFS-12528 | Add an option to not disable short-circuit reads on failures | Major | hdfs-client, performance | Andre Araujo | Xiao Chen
HDFS-12897 | getErasureCodingPolicy should handle .snapshot dir better | Major | erasure-coding, hdfs, snapshots | Harshakiran Reddy | LiXin Ge
MAPREDUCE-7033 | Map outputs implicitly rely on permissive umask for shuffle | Critical | mrv2 | Jason Lowe | Jason Lowe
HDFS-12942 | Synchronization issue in FSDataSetImpl#moveBlock | Major | . | Ajay Kumar | Ajay Kumar
HDFS-13100 | Handle IllegalArgumentException when GETSERVERDEFAULTS is not implemented in webhdfs. | Critical | hdfs, webhdfs | Yongjun Zhang | Yongjun Zhang
YARN-7849 | TestMiniYarnClusterNodeUtilization#testUpdateNodeUtilization fails due to heartbeat sync error | Major | test | Jason Lowe | Botong Huang
YARN-7801 | AmFilterInitializer should addFilter after fill all parameters | Critical | . | Sumana Sathish | Wangda Tan
YARN-7890 | NPE during container relaunch | Major | . | Billie Rinaldi | Jason Lowe
HDFS-12935 | Get ambiguous result for DFSAdmin command in HA mode when only one namenode is up | Major | tools | Jianfei Jiang | Jianfei Jiang
HDFS-13120 | Snapshot diff could be corrupted after concat | Major | namenode, snapshots | Xiaoyu Yao | Xiaoyu Yao
HDFS-8693 | refreshNamenodes does not support adding a new standby to a running DN | Critical | datanode, ha | Jian Fang | Ajith S
MAPREDUCE-7052 | TestFixedLengthInputFormat#testFormatCompressedIn is flaky | Major | client, test | Peter Bacsko | Peter Bacsko
HDFS-13112 | Token expiration edits may cause log corruption or deadlock | Critical | namenode | Daryn Sharp | Daryn Sharp
YARN-7873 | Revert YARN-6078 | Blocker | . | Billie Rinaldi | Billie Rinaldi

### TESTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
MAPREDUCE-7011 | TestClientDistributedCacheManager::testDetermineCacheVisibilities assumes all parent dirs set other exec | Trivial | . | Chris Douglas | Chris Douglas
HADOOP-14696 | parallel tests don’t work for Windows | Minor | test | Allen Wittenauer | Allen Wittenauer

### SUB-TASKS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-14993 | AliyunOSS: Override listFiles and listLocatedStatus | Major | fs/oss | Genmao Yu | Genmao Yu
YARN-6953 | Clean up ResourceUtils.setMinimumAllocationForMandatoryResources() and setMaximumAllocationForMandatoryResources() | Minor | resourcemanager | Daniel Templeton | Manikandan R
HDFS-12801 | RBF: Set MountTableResolver as default file resolver | Minor | . | Íñigo Goiri | Íñigo Goiri
HADOOP-15024 | AliyunOSS: support user agent configuration and include that & Hadoop version information to oss server | Major | fs, fs/oss | Sammi Chen | Sammi Chen
HDFS-12858 | RBF: Add router admin commands usage in HDFS commands reference doc | Minor | documentation | Yiqun Lin | Yiqun Lin
HDFS-12835 | RBF: Fix Javadoc parameter errors | Minor | . | Wei Yan | Wei Yan
YARN-6907 | Node information page in the old web UI should report resource types | Major | resourcemanager | Daniel Templeton | Gergely Novák
HDFS-12396 | Webhdfs file system should get delegation token from kms provider. | Major | encryption, kms, webhdfs | Rushabh S Shah | Rushabh S Shah
YARN-7610 | Extend Distributed Shell to support launching job with opportunistic containers | Major | applications/distributed-shell | Weiwei Yang | Weiwei Yang
HDFS-12875 | RBF: Complete logic for -readonly option of dfsrouteradmin add command | Major | . | Yiqun Lin | Íñigo Goiri
YARN-7383 | Node resource is not parsed correctly for resource names containing dot | Major | nodemanager, resourcemanager | Jonathan Hung | Gergely Novák
YARN-7119 | Support multiple resource types in rmadmin updateNodeResource command | Major | nodemanager, resourcemanager | Daniel Templeton | Manikandan R
YARN-7617 | Add a flag in distributed shell to automatically PROMOTE opportunistic containers to guaranteed once they are started | Minor | applications/distributed-shell | Weiwei Yang | Weiwei Yang
HDFS-12937 | RBF: Add more unit tests for router admin commands | Major | test | Yiqun Lin | Yiqun Lin
YARN-7032 | [ATSv2] NPE while starting hbase co-processor when HBase authorization is enabled. | Critical | . | Rohith Sharma K S | Rohith Sharma K S
HADOOP-14965 | s3a input stream “normal” fadvise mode to be adaptive | Major | fs/s3 | Steve Loughran | Steve Loughran
HADOOP-15086 | NativeAzureFileSystem file rename is not atomic | Major | fs/azure | Shixiong Zhu | Thomas Marquardt
HDFS-12988 | RBF: Mount table entries not properly updated in the local cache | Major | . | Íñigo Goiri | Íñigo Goiri
YARN-7716 | metricsTimeStart and metricsTimeEnd should be all lower case in the doc | Major | timelinereader | Haibo Chen | Haibo Chen
HDFS-12802 | RBF: Control MountTableResolver cache size | Major | . | Íñigo Goiri | Íñigo Goiri
HDFS-12919 | RBF: Support erasure coding methods in RouterRpcServer | Critical | . | Íñigo Goiri | Íñigo Goiri
YARN-6736 | Consider writing to both ats v1 & v2 from RM for smoother upgrades | Major | timelineserver | Vrushali C | Aaron Gresch
HADOOP-15027 | AliyunOSS: Support multi-thread pre-read to improve sequential read from Hadoop to Aliyun OSS performance | Major | fs/oss | wujinhu | wujinhu
HDFS-13028 | RBF: Fix spurious TestRouterRpc#testProxyGetStats | Minor | . | Íñigo Goiri | Íñigo Goiri
YARN-5094 | some YARN container events have timestamp of -1 | Critical | . | Sangjin Lee | Haibo Chen
YARN-7782 | Enable user re-mapping for Docker containers in yarn-default.xml | Blocker | security, yarn | Eric Yang | Eric Yang
HDFS-12772 | RBF: Federation Router State State Store internal API | Major | . | Íñigo Goiri | Íñigo Goiri
HDFS-13042 | RBF: Heartbeat Router State | Major | . | Íñigo Goiri | Íñigo Goiri
HDFS-13049 | RBF: Inconsistent Router OPTS config in branch-2 and branch-3 | Minor | . | Wei Yan | Wei Yan
HDFS-12574 | Add CryptoInputStream to WebHdfsFileSystem read call. | Major | encryption, kms, webhdfs | Rushabh S Shah | Rushabh S Shah
HDFS-13044 | RBF: Add a safe mode for the Router | Major | . | Íñigo Goiri | Íñigo Goiri
HDFS-13043 | RBF: Expose the state of the Routers in the federation | Major | . | Íñigo Goiri | Íñigo Goiri
HDFS-12997 | Move logging to slf4j in BlockPoolSliceStorage and Storage | Major | . | Ajay Kumar | Ajay Kumar

### OTHER:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-15149 | CryptoOutputStream should implement StreamCapabilities | Major | fs | Mike Drob | Xiao Chen
YARN-7691 | Add Unit Tests for ContainersLauncher | Major | . | Sampada Dehankar | Sampada Dehankar
HADOOP-15177 | Update the release year to 2018 | Blocker | build | Akira Ajisaka | Bharat Viswanadham
HADOOP-15197 | Remove tomcat from the Hadoop-auth test bundle | Major | . | Xiao Chen | Xiao Chen