Apache Hadoop 3.5.0 – Apache Hadoop Changelog

##### 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
- Fair Call Queue
- Native Libraries
- Proxy User
- Rack Awareness
- Secure Mode
- Service Level Authorization
- HTTP Authentication
- Credential Provider API
- Hadoop KMS
- Tracing
- Unix Shell Guide
- Registry
- Async Profiler

##### 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
- 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
- Running Applications in runC Containers
- Using CGroups
- Secure Containers
- 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

##### Hadoop Compatible File Systems

- Aliyun OSS
- Amazon S3
- Azure Blob Storage
- Azure Data Lake Storage
- Tencent COS
- Huaweicloud OBS
- VolcanoEngine TOS

##### Auth

- Overview
- Examples
- Configuration
- Building

##### Tools

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

##### 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 0.15.2 - 2008-01-08

### IMPROVEMENTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-2160 | separate website from user documentation | Major | documentation | Doug Cutting | Doug Cutting
HADOOP-1327 | Doc on Streaming | Major | documentation | Runping Qi | Rob Weltman
HADOOP-2382 | include hadoop-default.html in subversion | Minor | documentation | Doug Cutting |

### BUG FIXES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-2246 | In CHANGES.txt, move HADOOP-1851 & HADOOP-1231 to INCOMPATIBLE CHANGES section | Blocker | documentation | Devaraj Das | Arun C Murthy
HADOOP-2238 | TaskGraphServlet does not set Content-Type | Major | . | Paul Saab |
HADOOP-2129 | distcp between two clusters does not work if it is run on the target cluster | Critical | util | Murtaza A. Basrai | Doug Cutting
HADOOP-2158 | hdfsListDirectory in libhdfs does not scale | Blocker | . | Christian Kunz | Christian Kunz
HADOOP-2378 | last TaskCompletionEvent gets added to the job after the job is marked as completed | Blocker | . | Alejandro Abdelnur | Devaraj Das
HADOOP-2228 | Jobs fail because job.xml exists | Major | . | Johan Oskarsson | Johan Oskarsson
HADOOP-2422 | dfs -cat multiple files fail with ‘Unable to write to output stream.’ | Blocker | . | Koji Noguchi | Raghu Angadi
HADOOP-2460 | NameNode could delete wrong edits file when there is an error | Major | . | Raghu Angadi | dhruba borthakur
HADOOP-2227 | wrong usage of mapred.local.dir.minspacestart | Critical | . | Christian Kunz | Amareshwari Sriramadasu
HADOOP-2437 | final map output not evenly distributed across multiple disks | Blocker | . | Christian Kunz | Arun C Murthy
HADOOP-2486 | Dropping records at reducer. InMemoryFileSystem NPE. | Blocker | . | Koji Noguchi | Devaraj Das
HADOOP-2456 | German locale makes NameNode web interface crash | Minor | . | Matthias Friedrich | Matthias Friedrich