##### 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 3.0.0 - 2017-12-13

### INCOMPATIBLE CHANGES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-6623 | Add support to turn off launching privileged containers in the container-executor | Blocker | nodemanager | Varun Vasudev | Varun Vasudev
HADOOP-14816 | Update Dockerfile to use Xenial | Major | build, test | Allen Wittenauer | Allen Wittenauer
HADOOP-14957 | ReconfigurationTaskStatus is exposing guava Optional in its public api | Major | common | Haibo Chen | Xiao Chen
MAPREDUCE-6983 | Moving logging APIs over to slf4j in hadoop-mapreduce-client-core | Major | . | Jinjiang Ling | Jinjiang Ling
HDFS-12682 | ECAdmin -listPolicies will always show SystemErasureCodingPolicies state as DISABLED | Blocker | erasure-coding | Xiao Chen | Xiao Chen

### NEW FEATURES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-1492 | truly shared cache for jars (jobjar/libjar) | Major | . | Sangjin Lee | Chris Trezzo
HDFS-10467 | Router-based HDFS federation | Major | fs | Íñigo Goiri | Íñigo Goiri
YARN-5734 | OrgQueue for easy CapacityScheduler queue configuration management | Major | . | Min Shen | Min Shen
MAPREDUCE-5951 | Add support for the YARN Shared Cache | Major | . | Chris Trezzo | Chris Trezzo
YARN-6871 | Add additional deSelects params in RMWebServices#getAppReport | Major | resourcemanager, router | Giovanni Matteo Fumarola | Tanuj Nayak
HADOOP-14840 | Tool to estimate resource requirements of an application pipeline based on prior executions | Major | tools | Subru Krishnan | Rui Li
YARN-3813 | Support Application timeout feature in YARN. | Major | scheduler | nijel | Rohith Sharma K S

### IMPROVEMENTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
MAPREDUCE-6829 | Add peak memory usage counter for each task | Major | mrv2 | Yufei Gu | Miklos Szegedi
YARN-7045 | Remove FSLeafQueue#addAppSchedulable | Major | fairscheduler | Yufei Gu | Sen Zhao
YARN-7240 | Add more states and transitions to stabilize the NM Container state machine | Major | . | Arun Suresh | kartheek muthyala
HADOOP-14909 | Fix the word of “erasure encoding” in the top page | Trivial | documentation | Takanobu Asanuma | Takanobu Asanuma
HADOOP-14095 | Document caveats about the default JavaKeyStoreProvider in KMS | Major | documentation, kms | Xiao Chen | Xiao Chen
HADOOP-14928 | Update site release notes for 3.0.0 GA | Major | site | Andrew Wang | Andrew Wang
HDFS-12420 | Add an option to disallow ‘namenode format -force’ | Major | . | Ajay Kumar | Ajay Kumar
HADOOP-14521 | KMS client needs retry logic | Major | . | Rushabh S Shah | Rushabh S Shah
YARN-2162 | add ability in Fair Scheduler to optionally configure maxResources in terms of percentage | Major | fairscheduler, scheduler | Ashwin Shankar | Yufei Gu
YARN-7207 | Cache the RM proxy server address | Major | RM | Yufei Gu | Yufei Gu
HADOOP-14939 | Update project release notes with HDFS-10467 for 3.0.0 | Major | . | Íñigo Goiri | Íñigo Goiri
HDFS-12573 | Divide the total block metrics into replica and ec | Major | erasure-coding, metrics, namenode | Takanobu Asanuma | Takanobu Asanuma
HDFS-12553 | Add nameServiceId to QJournalProtocol | Major | journal-node | Bharat Viswanadham | Bharat Viswanadham
HDFS-12603 | Enable async edit logging by default | Major | namenode | Andrew Wang | Andrew Wang
HDFS-12642 | Log block and datanode details in BlockRecoveryWorker | Major | datanode | Xiao Chen | Xiao Chen
HADOOP-14938 | Configuration.updatingResource map should be initialized lazily | Major | . | Misha Dmitriev | Misha Dmitriev
HDFS-12613 | Native EC coder should implement release() as idempotent function. | Major | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
MAPREDUCE-6972 | Enable try-with-resources for RecordReader | Major | . | Zoltan Haindrich | Zoltan Haindrich
HADOOP-14880 | [KMS] Document&test missing KMS client side configs | Minor | . | Wei-Chiu Chuang | Gabor Bota
HDFS-12619 | Do not catch and throw unchecked exceptions if IBRs fail to process | Minor | namenode | Wei-Chiu Chuang | Wei-Chiu Chuang
HADOOP-14771 | hadoop-client does not include hadoop-yarn-client | Critical | common | Haibo Chen | Ajay Kumar
YARN-7359 | TestAppManager.testQueueSubmitWithNoPermission() should be scheduler agnostic | Minor | . | Haibo Chen | Haibo Chen
HDFS-12448 | Make sure user defined erasure coding policy ID will not overflow | Major | erasure-coding | Sammi Chen | Huafeng Wang
HADOOP-14944 | Add JvmMetrics to KMS | Major | kms | Xiao Chen | Xiao Chen
YARN-7261 | Add debug message for better download latency monitoring | Major | nodemanager | Yufei Gu | Yufei Gu
YARN-7357 | Several methods in TestZKRMStateStore.TestZKRMStateStoreTester.TestZKRMStateStoreInternal should have @Override annotations | Trivial | resourcemanager | Daniel Templeton | Sen Zhao
YARN-4163 | Audit getQueueInfo and getApplications calls | Major | . | Chang Li | Chang Li
HADOOP-9657 | NetUtils.wrapException to have special handling for 0.0.0.0 addresses and :0 ports | Minor | net | Steve Loughran | Varun Saxena
YARN-7389 | Make TestResourceManager Scheduler agnostic | Major | test | Robert Kanter | Robert Kanter
HDFS-12544 | SnapshotDiff - support diff generation on any snapshot root descendant directory | Major | hdfs | Manoj Govindassamy | Manoj Govindassamy
YARN-7358 | TestZKConfigurationStore and TestLeveldbConfigurationStore should explicitly set capacity scheduler | Minor | resourcemanager | Haibo Chen | Haibo Chen
YARN-7320 | Duplicate LiteralByteStrings in SystemCredentialsForAppsProto.credentialsForApp_ | Major | . | Misha Dmitriev | Misha Dmitriev
YARN-7262 | Add a hierarchy into the ZKRMStateStore for delegation token znodes to prevent jute buffer overflow | Major | . | Robert Kanter | Robert Kanter
YARN-7397 | Reduce lock contention in FairScheduler#getAppWeight() | Major | fairscheduler | Daniel Templeton | Daniel Templeton
HADOOP-14992 | Upgrade Avro patch version | Major | build | Chris Douglas | Bharat Viswanadham
YARN-6413 | FileSystem based Yarn Registry implementation | Major | amrmproxy, api, resourcemanager | Ellen Hui | Ellen Hui
HDFS-12482 | Provide a configuration to adjust the weight of EC recovery tasks to adjust the speed of recovery | Minor | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
HDFS-12744 | More logs when short-circuit read is failed and disabled | Major | datanode | Weiwei Yang | Weiwei Yang
HDFS-12771 | Add genstamp and block size to metasave Corrupt blocks list | Minor | . | Kuhu Shukla | Kuhu Shukla
HADOOP-14987 | Improve KMSClientProvider log around delegation token checking | Major | . | Xiaoyu Yao | Xiaoyu Yao
MAPREDUCE-6975 | Logging task counters | Major | task | Prabhu Joseph | Prabhu Joseph
YARN-7401 | Reduce lock contention in ClusterNodeTracker#getClusterCapacity() | Major | resourcemanager | Daniel Templeton | Daniel Templeton
HDFS-7060 | Avoid taking locks when sending heartbeats from the DataNode | Major | . | Haohui Mai | Jiandan Yang
YARN-7413 | Support resource type in SLS | Major | scheduler-load-simulator | Yufei Gu | Yufei Gu
YARN-7386 | Duplicate Strings in various places in Yarn memory | Major | . | Misha Dmitriev | Misha Dmitriev
HADOOP-14960 | Add GC time percentage monitor/alerter | Major | . | Misha Dmitriev | Misha Dmitriev
HADOOP-15037 | Add site release notes for OrgQueue and resource types | Major | . | Andrew Wang | Andrew Wang
HADOOP-14876 | Create downstream developer docs from the compatibility guidelines | Critical | documentation | Daniel Templeton | Daniel Templeton
HADOOP-14112 | Über-jira adl:// Azure Data Lake Phase I: Stabilization | Major | fs/adl | Steve Loughran | John Zhuge
HADOOP-15104 | AliyunOSS: change the default value of max error retry | Major | fs/oss | wujinhu | wujinhu
HADOOP-13204 | Über-jira: S3a phase III: scale and tuning | Major | fs/s3 | Steve Loughran | Steve Loughran
HADOOP-14552 | Über-jira: WASB client phase II: performance and testing | Major | fs/azure | Steve Loughran | Thomas Marquardt

### BUG FIXES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-7172 | ResourceCalculator.fitsIn() should not take a cluster resource parameter | Major | scheduler | Daniel Templeton | Sen Zhao
HADOOP-14901 | ReuseObjectMapper in Hadoop Common | Minor | . | Hanisha Koneru | Hanisha Koneru
YARN-7248 | NM returns new SCHEDULED container status to older clients | Blocker | nodemanager | Jason Lowe | Arun Suresh
HADOOP-14902 | LoadGenerator#genFile write close timing is incorrectly calculated | Major | fs | Jason Lowe | Hanisha Koneru
YARN-7084 | TestSchedulingMonitor#testRMStarts fails sporadically | Major | . | Jason Lowe | Jason Lowe
HDFS-12453 | TestDataNodeHotSwapVolumes fails in trunk Jenkins runs | Critical | test | Arpit Agarwal | Lei (Eddy) Xu
HADOOP-14915 | method name is incorrect in ConfServlet | Minor | . | Bharat Viswanadham | Bharat Viswanadham
HADOOP-14752 | TestCopyFromLocal#testCopyFromLocalWithThreads is fleaky | Major | test | Andras Bokor | Andras Bokor
HDFS-12569 | Unset EC policy logs empty payload in edit log | Blocker | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
YARN-6943 | Update Yarn to YARN in documentation | Minor | documentation | Miklos Szegedi | Chetna Chaudhari
YARN-7211 | AMSimulator in SLS does’t work due to refactor of responseId | Blocker | scheduler-load-simulator | Yufei Gu | Botong Huang
HADOOP-14459 | SerializationFactory shouldn’t throw a NullPointerException if the serializations list is not defined | Minor | . | Nandor Kollar | Nandor Kollar
YARN-7044 | TestContainerAllocation#testAMContainerAllocationWhenDNSUnavailable fails | Major | capacity scheduler, test | Wangda Tan | Akira Ajisaka
YARN-7226 | Whitelisted variables do not support delayed variable expansion | Major | nodemanager | Jason Lowe | Jason Lowe
HADOOP-14616 | Client fails to read a block with erasure code (XOR, native) when one of the data block is lost | Blocker | . | Ayappan | Huafeng Wang
YARN-7279 | Fix typo in helper message of ContainerLauncher | Trivial | . | Elek, Marton | Elek, Marton
YARN-7258 | Add Node and Rack Hints to Opportunistic Scheduler | Major | . | Arun Suresh | kartheek muthyala
YARN-7009 | TestNMClient.testNMClientNoCleanupOnStop is flaky by design | Major | . | Miklos Szegedi | Miklos Szegedi
HDFS-12567 | BlockPlacementPolicyRackFaultTolerant fails with racks with very few nodes | Major | erasure-coding | Andrew Wang | Andrew Wang
HDFS-12494 | libhdfs SIGSEGV in setTLSExceptionStrings | Major | libhdfs | John Zhuge | John Zhuge
YARN-7245 | Max AM Resource column in Active Users Info section of Capacity Scheduler UI page should be updated per-user | Major | capacity scheduler, yarn | Eric Payne | Eric Payne
HDFS-12606 | When using native decoder, DFSStripedStream#close crashes JVM after being called multiple times. | Critical | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
HDFS-12599 | Remove Mockito dependency from DataNodeTestUtils | Minor | test | Ted Yu | Ted Yu
YARN-7309 | TestClientRMService#testUpdateApplicationPriorityRequest and TestClientRMService#testUpdatePriorityAndKillAppWithZeroClusterResource test functionality not supported by FairScheduler | Major | test | Robert Kanter | Robert Kanter
HADOOP-14912 | FairCallQueue may defer servicing calls | Major | ipc | Daryn Sharp | Daryn Sharp
HDFS-12635 | Unnecessary exception declaration of the CellBuffers constructor | Minor | . | Huafeng Wang | Huafeng Wang
HDFS-12622 | Fix enumerate in HDFSErasureCoding.md | Minor | documentation | Akira Ajisaka | Yiqun Lin
YARN-7082 | TestContainerManagerSecurity failing in trunk | Major | . | Varun Saxena | Akira Ajisaka
HADOOP-13556 | Change Configuration.getPropsWithPrefix to use getProps instead of iterator | Major | . | Larry McCay | Larry McCay
HADOOP-13102 | Update GroupsMapping documentation to reflect the new changes | Major | documentation | Anu Engineer | Esther Kundin
YARN-7270 | Fix unsafe casting from long to int for class Resource and its sub-classes | Major | resourcemanager | Yufei Gu | Yufei Gu
YARN-7310 | TestAMRMProxy#testAMRMProxyE2E fails with FairScheduler | Major | test | Robert Kanter | Robert Kanter
YARN-7269 | Tracking URL in the app state does not get redirected to ApplicationMaster for Running applications | Critical | . | Sumana Sathish | Tan, Wangda
HDFS-12659 | Update TestDeadDatanode#testNonDFSUsedONDeadNodeReReg to increase heartbeat recheck interval | Minor | . | Ajay Kumar | Ajay Kumar
HDFS-12485 | expunge may fail to remove trash from encryption zone | Major | . | Wei-Chiu Chuang | Wei-Chiu Chuang
HADOOP-14949 | TestKMS#testACLs fails intermittently | Major | kms, test | Xiao Chen | Xiao Chen
YARN-7124 | LogAggregationTFileController deletes/renames while file is open | Critical | nodemanager | Daryn Sharp | Jason Lowe
YARN-7333 | container-executor fails to remove entries from a directory that is not writable or executable | Critical | . | Jason Lowe | Jason Lowe
YARN-7308 | TestApplicationACLs fails with FairScheduler | Major | test | Robert Kanter | Robert Kanter
HADOOP-14948 | Document missing config key hadoop.treat.subject.external | Minor | security | Wei-Chiu Chuang | Ajay Kumar
HDFS-12614 | FSPermissionChecker#getINodeAttrs() throws NPE when INodeAttributesProvider configured | Major | . | Manoj Govindassamy | Manoj Govindassamy
YARN-7341 | TestRouterWebServiceUtil#testMergeMetrics is flakey | Major | federation | Robert Kanter | Robert Kanter
HDFS-12612 | DFSStripedOutputStream#close will throw if called a second time with a failed streamer | Major | erasure-coding | Andrew Wang | Lei (Eddy) Xu
HADOOP-14958 | CLONE - Fix source-level compatibility after HADOOP-11252 | Blocker | . | Junping Du | Junping Du
YARN-7294 | TestSignalContainer#testSignalRequestDeliveryToNM fails intermittently with Fair scheduler | Major | . | Miklos Szegedi | Miklos Szegedi
YARN-7170 | Improve bower dependencies for YARN UI v2 | Critical | webapp | Sunil Govindan | Sunil Govindan
YARN-7355 | TestDistributedShell should be scheduler agnostic | Major | . | Haibo Chen | Haibo Chen
HDFS-12497 | Re-enable TestDFSStripedOutputStreamWithFailure tests | Major | erasure-coding | Andrew Wang | Huafeng Wang
HADOOP-14942 | DistCp#cleanup() should check whether jobFS is null | Minor | . | Ted Yu | Andras Bokor
YARN-7318 | Fix shell check warnings of SLS. | Major | . | Wangda Tan | Gergely Novák
HDFS-12518 | Re-encryption should handle task cancellation and progress better | Major | encryption | Xiao Chen | Xiao Chen
HADOOP-14966 | Handle JDK-8071638 for hadoop-common | Blocker | . | Bibin A Chundatt | Bibin A Chundatt
HDFS-12249 | dfsadmin -metaSave to output maintenance mode blocks | Minor | namenode | Wei-Chiu Chuang | Wellington Chevreuil
HDFS-12695 | Add a link to HDFS router federation document in site.xml | Minor | documentation | Yiqun Lin | Yiqun Lin
YARN-7382 | NoSuchElementException in FairScheduler after failover causes RM crash | Blocker | fairscheduler | Robert Kanter | Robert Kanter
YARN-7385 | TestFairScheduler#testUpdateDemand and TestFSLeafQueue#testUpdateDemand are failing with NPE | Major | test | Robert Kanter | Yufei Gu
HADOOP-14030 | PreCommit TestKDiag failure | Major | security | John Zhuge | Wei-Chiu Chuang
HADOOP-14979 | Upgrade maven-dependency-plugin to 3.0.2 | Major | build | liyunzhang | liyunzhang
HADOOP-14977 | Xenial dockerfile needs ant in main build for findbugs | Trivial | build, test | Allen Wittenauer | Akira Ajisaka
YARN-7339 | LocalityMulticastAMRMProxyPolicy should handle cancel request properly | Minor | . | Botong Huang | Botong Huang
HDFS-9914 | Fix configurable WebhDFS connect/read timeout | Blocker | hdfs-client, webhdfs | Xiaoyu Yao | Xiaoyu Yao
YARN-7375 | Possible NPE in RMWebapp when HA is enabled and the active RM fails | Major | . | Chandni Singh | Chandni Singh
HDFS-12582 | Replace HdfsFileStatus constructor with a builder pattern. | Major | . | Bharat Viswanadham | Bharat Viswanadham
HADOOP-14986 | Enforce JDK limitations | Major | build | Chris Douglas | Chris Douglas
HADOOP-14991 | Add missing figures to Resource Estimator tool | Major | . | Subru Krishnan | Rui Li
YARN-7299 | Fix TestDistributedScheduler | Major | . | Jason Lowe | Arun Suresh
YARN-6747 | TestFSAppStarvation.testPreemptionEnable fails intermittently | Major | . | Sunil Govindan | Miklos Szegedi
YARN-7336 | Unsafe cast from long to int Resource.hashCode() method | Critical | resourcemanager | Daniel Templeton | Miklos Szegedi
YARN-7244 | ShuffleHandler is not aware of disks that are added | Major | . | Kuhu Shukla | Kuhu Shukla
HADOOP-14990 | Clean up jdiff xml files added for 2.8.2 release | Blocker | . | Subru Krishnan | Junping Du
HADOOP-14919 | BZip2 drops records when reading data in splits | Critical | . | Aki Tanaka | Jason Lowe
HDFS-12699 | TestMountTable fails with Java 7 | Major | . | Íñigo Goiri | Íñigo Goiri
HDFS-12714 | Hadoop 3 missing fix for HDFS-5169 | Major | native | Joe McDonnell | Joe McDonnell
HDFS-12219 | Javadoc for FSNamesystem#getMaxObjects is incorrect | Trivial | . | Erik Krogen | Erik Krogen
YARN-7412 | test_docker_util.test_check_mount_permitted() is failing | Critical | nodemanager | Haibo Chen | Eric Badger
MAPREDUCE-6999 | Fix typo “onf” in DynamicInputChunk.java | Trivial | . | fang zhenyi | fang zhenyi
YARN-7364 | Queue dash board in new YARN UI has incorrect values | Critical | webapp | Sunil Govindan | Sunil Govindan
YARN-7370 | Preemption properties should be refreshable | Major | capacity scheduler, scheduler preemption | Eric Payne | Gergely Novák
YARN-7400 | incorrect log preview displayed in jobhistory server ui | Major | yarn | Santhosh B Gowda | Xuan Gong
HADOOP-15013 | Fix ResourceEstimator findbugs issues | Blocker | . | Allen Wittenauer | Arun Suresh
YARN-7432 | Fix DominantResourceFairnessPolicy serializable findbugs issues | Blocker | . | Allen Wittenauer | Daniel Templeton
YARN-7434 | Router getApps REST invocation fails with multiple RMs | Critical | . | Subru Krishnan | Íñigo Goiri
HDFS-12725 | BlockPlacementPolicyRackFaultTolerant fails with very uneven racks | Major | erasure-coding | Xiao Chen | Xiao Chen
YARN-5085 | Add support for change of container ExecutionType | Major | . | Arun Suresh | Arun Suresh
YARN-7428 | Add containerId to Localizer failed logs | Minor | nodemanager | Prabhu Joseph | Prabhu Joseph
YARN-7410 | Cleanup FixedValueResource to avoid dependency to ResourceUtils | Major | resourcemanager | Sunil Govindan | Wangda Tan
YARN-7360 | TestRM.testNMTokenSentForNormalContainer() should be scheduler agnostic | Major | test | Haibo Chen | Haibo Chen
HADOOP-15018 | Update JAVA_HOME in create-release for Xenial Dockerfile | Blocker | build | Andrew Wang | Andrew Wang
HDFS-12788 | Reset the upload button when file upload fails | Critical | ui, webhdfs | Brahma Reddy Battula | Brahma Reddy Battula
YARN-7453 | Fix issue where RM fails to switch to active after first successful start | Blocker | resourcemanager | Rohith Sharma K S | Rohith Sharma K S
YARN-7458 | TestContainerManagerSecurity is still flakey | Major | test | Robert Kanter | Robert Kanter
HADOOP-15025 | Ensure singleton for ResourceEstimatorService | Major | . | Subru Krishnan | Rui Li
HDFS-12732 | Correct spellings of ramdomly to randomly in log. | Trivial | . | hu xiaodong | hu xiaodong
YARN-7454 | RMAppAttemptMetrics#getAggregateResourceUsage can NPE due to double lookup | Minor | resourcemanager | Jason Lowe | Jason Lowe
YARN-7388 | TestAMRestart should be scheduler agnostic | Major | . | Haibo Chen | Haibo Chen
YARN-7465 | start-yarn.sh fails to start ResourceManager unless running as root | Blocker | . | Sean Mackrory |
HADOOP-8522 | ResetableGzipOutputStream creates invalid gzip files when finish() and resetState() are used | Major | io | Mike Percy | Mike Percy
YARN-7475 | Fix Container log link in new YARN UI | Major | . | Sunil Govindan | Sunil Govindan
HADOOP-15036 | Update LICENSE.txt for HADOOP-14840 | Major | . | Arun Suresh | Arun Suresh
YARN-6078 | Containers stuck in Localizing state | Major | . | Jagadish | Billie Rinaldi
YARN-7469 | Capacity Scheduler Intra-queue preemption: User can starve if newest app is exactly at user limit | Major | capacity scheduler, yarn | Eric Payne | Eric Payne
HADOOP-15067 | GC time percentage reported in JvmMetrics should be a gauge, not counter | Major | . | Misha Dmitriev | Misha Dmitriev
YARN-7290 | Method canContainerBePreempted can return true when it shouldn’t | Major | fairscheduler | Steven Rand | Steven Rand
HDFS-12754 | Lease renewal can hit a deadlock | Major | . | Kuhu Shukla | Kuhu Shukla
YARN-6647 | RM can crash during transitionToStandby due to InterruptedException | Critical | resourcemanager | Jason Lowe | Bibin A Chundatt
HDFS-11754 | Make FsServerDefaults cache configurable. | Minor | . | Rushabh S Shah | Mikhail Erofeev
YARN-7509 | AsyncScheduleThread and ResourceCommitterService are still running after RM is transitioned to standby | Critical | . | Tao Yang | Tao Yang
YARN-7589 | TestPBImplRecords fails with NullPointerException | Major | . | Jason Lowe | Daniel Templeton
HADOOP-15058 | create-release site build outputs dummy shaded jars due to skipShade | Blocker | . | Andrew Wang | Andrew Wang
HDFS-12889 | Router UI is missing robots.txt file | Major | . | Bharat Viswanadham | Bharat Viswanadham
HDFS-12872 | EC Checksum broken when BlockAccessToken is enabled | Critical | erasure-coding | Xiao Chen | Xiao Chen
HDFS-11576 | Block recovery will fail indefinitely if recovery time > heartbeat interval | Critical | datanode, hdfs, namenode | Lukas Majercak | Lukas Majercak
YARN-7607 | Remove the trailing duplicated timestamp in container diagnostics message | Minor | nodemanager | Weiwei Yang | Weiwei Yang
HDFS-12840 | Creating a file with non-default EC policy in a EC zone is not correctly serialized in the editlog | Blocker | erasure-coding | Lei (Eddy) Xu | Lei (Eddy) Xu
HADOOP-15080 | Aliyun OSS: update oss sdk from 2.8.1 to 2.8.3 to remove its dependency on Cat-x “json-lib” | Blocker | fs/oss | Chris Douglas | Sammi Chen
HADOOP-15059 | 3.0 deployment cannot work with old version MR tar ball which breaks rolling upgrade | Blocker | security | Junping Du | Jason Lowe
YARN-7591 | NPE in async-scheduling mode of CapacityScheduler | Critical | capacityscheduler | Tao Yang | Tao Yang
YARN-7381 | Enable the configuration: yarn.nodemanager.log-container-debug-info.enabled by default in yarn-default.xml | Critical | . | Xuan Gong | Xuan Gong

### SUB-TASKS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-4081 | Add support for multiple resource types in the Resource class | Major | resourcemanager | Varun Vasudev | Varun Vasudev
YARN-4172 | Extend DominantResourceCalculator to account for all resources | Major | resourcemanager | Varun Vasudev | Varun Vasudev
YARN-4715 | Add support to read resource types from a config file | Major | nodemanager, resourcemanager | Varun Vasudev | Varun Vasudev
YARN-4829 | Add support for binary units | Major | nodemanager, resourcemanager | Varun Vasudev | Varun Vasudev
YARN-4830 | Add support for resource types in the nodemanager | Major | nodemanager | Varun Vasudev | Varun Vasudev
YARN-5242 | Update DominantResourceCalculator to consider all resource types in calculations | Major | resourcemanager | Varun Vasudev | Varun Vasudev
YARN-5586 | Update the Resources class to consider all resource types | Major | nodemanager, resourcemanager | Varun Vasudev | Varun Vasudev
YARN-5216 | Expose configurable preemption policy for OPPORTUNISTIC containers running on the NM | Major | distributed-scheduling | Arun Suresh | Hitesh Sharma
YARN-5951 | Changes to allow CapacityScheduler to use configuration store | Major | . | Jonathan Hung | Jonathan Hung
YARN-5946 | Create YarnConfigurationStore interface and InMemoryConfigurationStore class | Major | . | Jonathan Hung | Jonathan Hung
YARN-6232 | Update resource usage and preempted resource calculations to take into account all resource types | Major | resourcemanager | Varun Vasudev | Varun Vasudev
YARN-5948 | Implement MutableConfigurationManager for handling storage into configuration store | Major | . | Jonathan Hung | Jonathan Hung
YARN-5952 | Create REST API for changing YARN scheduler configurations | Major | . | Jonathan Hung | Jonathan Hung
HDFS-10882 | Federation State Store Interface API | Major | fs | Jason Kace | Jason Kace
YARN-6445 | [YARN-3926] Performance improvements in resource profile branch with respect to SLS | Major | nodemanager, resourcemanager | Varun Vasudev | Varun Vasudev
HDFS-10630 | Federation State Store FS Implementation | Major | hdfs | Íñigo Goiri | Jason Kace
YARN-5949 | Add pluggable configuration ACL policy interface and implementation | Major | . | Jonathan Hung | Jonathan Hung
YARN-6575 | Support global configuration mutation in MutableConfProvider | Major | . | Jonathan Hung | Jonathan Hung
YARN-5953 | Create CLI for changing YARN configurations | Major | . | Jonathan Hung | Jonathan Hung
YARN-6761 | Fix build for YARN-3926 branch | Major | nodemanager, resourcemanager | Varun Vasudev | Varun Vasudev
YARN-6786 | ResourcePBImpl imports cleanup | Trivial | resourcemanager | Daniel Templeton | Yeliang Cang
YARN-5292 | NM Container lifecycle and state transitions to support for PAUSED container state. | Major | . | Hitesh Sharma | Hitesh Sharma
HDFS-12223 | Rebasing HDFS-10467 | Major | fs | Íñigo Goiri | Íñigo Goiri
HDFS-10687 | Federation Membership State Store internal API | Major | hdfs | Íñigo Goiri | Jason Kace
YARN-5947 | Create LeveldbConfigurationStore class using Leveldb as backing store | Major | . | Jonathan Hung | Jonathan Hung
YARN-6322 | Disable queue refresh when configuration mutation is enabled | Major | . | Jonathan Hung | Jonathan Hung
HDFS-11826 | Federation Namenode Heartbeat | Major | fs | Íñigo Goiri | Íñigo Goiri
YARN-6788 | Improve performance of resource profile branch | Blocker | nodemanager, resourcemanager | Sunil Govindan | Sunil Govindan
HDFS-10880 | Federation Mount Table State Store internal API | Major | fs | Jason Kace | Íñigo Goiri
HDFS-10646 | Federation admin tool | Major | fs | Íñigo Goiri | Íñigo Goiri
YARN-6994 | Remove last uses of Long from resource types code | Minor | resourcemanager | Daniel Templeton | Daniel Templeton
YARN-6892 | Improve API implementation in Resources and DominantResourceCalculator class | Major | nodemanager, resourcemanager | Sunil Govindan | Sunil Govindan
HDFS-11554 | [Documentation] Router-based federation documentation | Minor | fs | Íñigo Goiri | Íñigo Goiri
HDFS-12312 | Rebasing HDFS-10467 (2) | Major | . | Íñigo Goiri | Íñigo Goiri
YARN-6610 | DominantResourceCalculator#getResourceAsValue dominant param is updated to handle multiple resources | Critical | resourcemanager | Daniel Templeton | Daniel Templeton
YARN-7030 | Performance optimizations in Resource and ResourceUtils class | Critical | nodemanager, resourcemanager | Wangda Tan | Wangda Tan
YARN-7042 | Clean up unit tests after YARN-6610 | Major | test | Daniel Templeton | Daniel Templeton
YARN-6789 | Add Client API to get all supported resource types from RM | Major | nodemanager, resourcemanager | Sunil Govindan | Sunil Govindan
YARN-6781 | ResourceUtils#initializeResourcesMap takes an unnecessary Map parameter | Minor | resourcemanager | Daniel Templeton | Yu-Tang Lin
HDFS-10631 | Federation State Store ZooKeeper implementation | Major | fs | Íñigo Goiri | Jason Kace
YARN-7067 | Optimize ResourceType information display in UI | Critical | nodemanager, resourcemanager | Wangda Tan | Wangda Tan
YARN-7039 | Fix javac and javadoc errors in YARN-3926 branch | Major | nodemanager, resourcemanager | Sunil Govindan | Sunil Govindan
YARN-7024 | Fix issues on recovery in LevelDB store | Major | . | Jonathan Hung | Jonathan Hung
YARN-7093 | Improve log message in ResourceUtils | Trivial | nodemanager, resourcemanager | Sunil Govindan | Sunil Govindan
YARN-6933 | ResourceUtils.DISALLOWED_NAMES check is duplicated | Major | resourcemanager | Daniel Templeton | Manikandan R
YARN-5328 | Plan/ResourceAllocation data structure enhancements required to support recurring reservations in ReservationSystem | Major | resourcemanager | Subru Krishnan | Subru Krishnan
HDFS-12384 | Fixing compilation issue with BanDuplicateClasses | Major | fs | Íñigo Goiri | Íñigo Goiri
HDFS-12335 | Federation Metrics | Major | fs | Giovanni Matteo Fumarola | Íñigo Goiri
YARN-5330 | SharingPolicy enhancements required to support recurring reservations in ReservationSystem | Major | resourcemanager | Subru Krishnan | Carlo Curino
YARN-7072 | Add a new log aggregation file format controller | Major | . | Xuan Gong | Xuan Gong
YARN-7136 | Additional Performance Improvement for Resource Profile Feature | Critical | nodemanager, resourcemanager | Wangda Tan | Wangda Tan
YARN-7137 | Move newly added APIs to unstable in YARN-3926 branch | Blocker | nodemanager, resourcemanager | Wangda Tan | Wangda Tan
YARN-6059 | Update paused container state in the NM state store | Blocker | . | Hitesh Sharma | Hitesh Sharma
HDFS-12430 | Rebasing HDFS-10467 After HDFS-12269 and HDFS-12218 | Major | fs | Íñigo Goiri | Íñigo Goiri
YARN-7194 | Log aggregation status is always Failed with the newly added log aggregation IndexedFileFormat | Major | . | Xuan Gong | Xuan Gong
YARN-6612 | Update fair scheduler policies to be aware of resource types | Major | fairscheduler | Daniel Templeton | Daniel Templeton
HDFS-12450 | Fixing TestNamenodeHeartbeat and support non-HA | Major | fs | Íñigo Goiri | Íñigo Goiri
YARN-6840 | Implement zookeeper based store for scheduler configuration updates | Major | . | Wangda Tan | Jonathan Hung
YARN-7046 | Add closing logic to configuration store | Major | . | Jonathan Hung | Jonathan Hung
HDFS-12381 | [Documentation] Adding configuration keys for the Router | Minor | fs | Íñigo Goiri | Íñigo Goiri
YARN-7238 | Documentation for API based scheduler configuration management | Major | . | Jonathan Hung | Jonathan Hung
YARN-7252 | Removing queue then failing over results in exception | Critical | . | Jonathan Hung | Jonathan Hung
YARN-7251 | Misc changes to YARN-5734 | Major | . | Jonathan Hung | Jonathan Hung
YARN-7250 | Update Shared cache client api to use URLs | Minor | . | Chris Trezzo | Chris Trezzo
YARN-6509 | Add a size threshold beyond which yarn logs will require a force option | Major | . | Siddharth Seth | Xuan Gong
YARN-7259 | Add size-based rolling policy to LogAggregationIndexedFileController | Major | . | Xuan Gong | Xuan Gong
MAPREDUCE-6971 | Moving logging APIs over to slf4j in hadoop-mapreduce-client-app | Major | . | Jinjiang Ling | Jinjiang Ling
YARN-6550 | Capture launch_container.sh logs to a separate log file | Major | . | Wangda Tan | Suma Shivaprasad
HDFS-12580 | Rebasing HDFS-10467 after HDFS-12447 | Major | fs | Íñigo Goiri | Íñigo Goiri
YARN-6916 | Moving logging APIs over to slf4j in hadoop-yarn-server-common | Major | . | Akira Ajisaka | Akira Ajisaka
YARN-7219 | Make AllocateRequestProto compatible with branch-2/branch-2.8 | Critical | yarn | Ray Chiang | Ray Chiang
YARN-6975 | Moving logging APIs over to slf4j in hadoop-yarn-server-tests, hadoop-yarn-server-web-proxy and hadoop-yarn-server-router | Major | . | Yeliang Cang | Yeliang Cang
YARN-2037 | Add work preserving restart support for Unmanaged AMs | Major | resourcemanager | Karthik Kambatla | Botong Huang
YARN-5329 | Placement Agent enhancements required to support recurring reservations in ReservationSystem | Blocker | resourcemanager | Subru Krishnan | Carlo Curino
YARN-6182 | Fix alignment issues and missing information in new YARN UI’s Queue page | Major | yarn-ui-v2 | Akhil PB | Akhil PB
YARN-2960 | Add documentation for the YARN shared cache | Major | . | Chris Trezzo | Chris Trezzo
HDFS-12273 | Federation UI | Major | fs | Íñigo Goiri | Íñigo Goiri
HDFS-12577 | Rename Router tooling | Major | fs | Íñigo Goiri | Íñigo Goiri
HDFS-12541 | Extend TestSafeModeWithStripedFile with a random EC policy | Major | erasure-coding, test | Takanobu Asanuma | Takanobu Asanuma
YARN-7304 | Merge YARN-5734 branch to branch-3.0 | Major | . | Xuan Gong | Xuan Gong
HDFS-12547 | Extend TestQuotaWithStripedBlocks with a random EC policy | Major | erasure-coding, test | Takanobu Asanuma | Takanobu Asanuma
YARN-7205 | Log improvements for the ResourceUtils | Major | nodemanager, resourcemanager | Jian He | Sunil Govindan
HDFS-12637 | Extend TestDistributedFileSystemWithECFile with a random EC policy | Major | erasure-coding, test | Takanobu Asanuma | Takanobu Asanuma
YARN-7275 | NM Statestore cleanup for Container updates | Blocker | . | Arun Suresh | kartheek muthyala
YARN-7311 | Fix TestRMWebServicesReservation parametrization for fair scheduler | Blocker | fairscheduler, reservation system | Yufei Gu | Yufei Gu
YARN-6546 | SLS is slow while loading 10k queues | Major | scheduler-load-simulator | Yufei Gu | Yufei Gu
YARN-7345 | GPU Isolation: Incorrect minor device numbers written to devices.deny file | Major | . | Jonathan Hung | Jonathan Hung
YARN-7338 | Support same origin policy for cross site scripting prevention. | Major | yarn-ui-v2 | Vrushali C | Sunil Govindan
HDFS-12620 | Backporting HDFS-10467 to branch-2 | Major | . | Íñigo Goiri | Íñigo Goiri
YARN-4090 | Make Collections.sort() more efficient by caching resource usage | Major | fairscheduler | Xianyin Xin | Yufei Gu
YARN-7353 | Docker permitted volumes don’t properly check for directories | Major | yarn | Eric Badger | Eric Badger
YARN-6984 | DominantResourceCalculator.isAnyMajorResourceZero() should test all resources | Major | scheduler | Daniel Templeton | Sunil Govindan
YARN-3661 | Basic Federation UI | Major | nodemanager, resourcemanager | Giovanni Matteo Fumarola | Íñigo Goiri
YARN-4827 | Document configuration of ReservationSystem for FairScheduler | Blocker | capacity scheduler | Subru Krishnan | Yufei Gu
YARN-5516 | Add REST API for supporting recurring reservations | Major | resourcemanager | Sangeetha Abdu Jyothi | Sean Po
YARN-6505 | Define the strings used in SLS JSON input file format | Major | scheduler-load-simulator | Yufei Gu | Gergely Novák
YARN-7178 | Add documentation for Container Update API | Blocker | . | Arun Suresh | Arun Suresh
YARN-7374 | Improve performance of DRF comparisons for resource types in fair scheduler | Critical | fairscheduler | Daniel Templeton | Daniel Templeton
YARN-6927 | Add support for individual resource types requests in MapReduce | Major | resourcemanager | Daniel Templeton | Gergo Repas
YARN-7407 | Moving logging APIs over to slf4j in hadoop-yarn-applications | Major | . | Yeliang Cang | Yeliang Cang
YARN-7379 | Moving logging APIs over to slf4j in hadoop-yarn-client | Major | . | Yeliang Cang | Yeliang Cang
YARN-7276 | Federation Router Web Service fixes | Major | . | Íñigo Goiri | Íñigo Goiri
HADOOP-14997 | Add hadoop-aliyun as dependency of hadoop-cloud-storage | Minor | fs/oss | Genmao Yu | Genmao Yu
YARN-7289 | Application lifetime does not work with FairScheduler | Major | resourcemanager | Miklos Szegedi | Miklos Szegedi
YARN-7286 | Add support for docker to have no capabilities | Major | yarn | Eric Badger | Eric Badger
HDFS-11467 | Support ErasureCoding section in OIV XML/ReverseXML | Blocker | tools | Wei-Chiu Chuang | Huafeng Wang
YARN-7307 | Allow client/AM update supported resource types via YARN APIs | Blocker | nodemanager, resourcemanager | Wangda Tan | Sunil Govindan
MAPREDUCE-6997 | Moving logging APIs over to slf4j in hadoop-mapreduce-client-hs | Major | . | Akira Ajisaka | Gergely Novák
MAPREDUCE-7001 | Moving logging APIs over to slf4j in hadoop-mapreduce-client-shuffle | Trivial | . | Jinjiang Ling | Jinjiang Ling
YARN-7166 | Container REST endpoints should report resource types | Major | resourcemanager | Daniel Templeton | Daniel Templeton
YARN-7143 | FileNotFound handling in ResourceUtils is inconsistent | Major | resourcemanager | Daniel Templeton | Daniel Templeton
YARN-7437 | Rename PlacementSet and SchedulingPlacementSet | Major | . | Wangda Tan | Wangda Tan
YARN-6909 | Use LightWeightedResource when number of resource types more than two | Critical | resourcemanager | Daniel Templeton | Sunil Govindan
YARN-7406 | Moving logging APIs over to slf4j in hadoop-yarn-api | Major | . | Yeliang Cang | Yeliang Cang
YARN-7442 | [YARN-7069] Limit format of resource type name | Blocker | nodemanager, resourcemanager | Wangda Tan | Wangda Tan
YARN-7369 | Improve the resource types docs | Major | docs | Daniel Templeton | Daniel Templeton
HADOOP-14993 | AliyunOSS: Override listFiles and listLocatedStatus | Major | fs/oss | Genmao Yu | Genmao Yu
YARN-7430 | Enable user re-mapping for Docker containers by default | Blocker | security, yarn | Eric Yang | Eric Yang
HADOOP-15024 | AliyunOSS: support user agent configuration and include that & Hadoop version information to oss server | Major | fs, fs/oss | Sammi Chen | Sammi Chen
YARN-7541 | Node updates don’t update the maximum cluster capability for resources other than CPU and memory | Critical | resourcemanager | Daniel Templeton | Daniel Templeton

### OTHER:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
YARN-7317 | Fix overallocation resulted from ceiling in LocalityMulticastAMRMProxyPolicy | Minor | . | Botong Huang | Botong Huang
HDFS-12847 | Regenerate editsStored and editsStored.xml in HDFS tests | Major | test | Lei (Eddy) Xu | Lei (Eddy) Xu
HADOOP-13493 | Compatibility Docs should clarify the policy for what takes precedence when a conflict is found | Critical | documentation | Robert Kanter | Daniel Templeton