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 0.4.0 - 2006-06-28

### NEW FEATURES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-250 | HTTP Browsing interface for DFS Health/Status | Major | . | Devaraj Das |
HADOOP-123 | mini map/reduce cluster for junit tests | Major | . | Owen O’Malley | Milind Bhandarkar
HADOOP-296 | Do not assign blocks to a datanode with < x mb free | Major | . | Johan Oskarsson | Johan Oskarsson

### IMPROVEMENTS:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-298 | nicer reports of progress for distcp | Minor | util | Owen O’Malley | Owen O’Malley
HADOOP-271 | add links to task tracker http server from task details and failure pages | Minor | . | Owen O’Malley | Owen O’Malley
HADOOP-314 | remove the append phase in sorting the reduce inputs | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-301 | the randomwriter example will clobber the output file | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-305 | tasktracker waits for 10 seconds for asking for a task. | Minor | . | Mahadev konar | Mahadev konar
HADOOP-59 | support generic command-line options | Minor | conf | Doug Cutting | Hairong Kuang
HADOOP-326 | cleanup of dead field (map ouput port) | Minor | . | Owen O’Malley | Owen O’Malley
HADOOP-328 | add a -i option to distcp to ignore read errors of the input files | Major | util | Owen O’Malley | Owen O’Malley

### BUG FIXES:

JIRA | Summary | Priority | Component | Reporter | Contributor
--- | --- | --- | --- | --- | ---
HADOOP-299 | maps from second jobs will not run until the first job finishes completely | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-210 | Namenode not able to accept connections | Major | . | Mahadev konar | Devaraj Das
HADOOP-311 | dfs client timeout on read kills task | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-316 | job tracker has a deadlock | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-317 | “connection was forcibly closed” Exception in RPC on Windows | Major | ipc | Konstantin Shvachko | Doug Cutting
HADOOP-319 | FileSystem “close” does not remove the closed fs from the fs map | Major | fs | Hairong Kuang | Hairong Kuang
HADOOP-135 | Potential deadlock in JobTracker. | Major | . | Konstantin Shvachko | Owen O’Malley
HADOOP-278 | a missing map/reduce input directory does not produce a user-visible error message | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-304 | UnregisteredDatanodeException message correction | Trivial | . | Konstantin Shvachko | Konstantin Shvachko
HADOOP-325 | ClassNotFoundException under jvm 1.6 | Major | ipc | Owen O’Malley | Owen O’Malley
HADOOP-27 | MapRed tries to allocate tasks to nodes that have no available disk space | Major | . | Mike Cafarella |
HADOOP-99 | task trackers can only be assigned one task every heartbeat | Major | . | Owen O’Malley | Owen O’Malley
HADOOP-318 | Progress in writing a DFS file does not count towards Job progress and can make the task timeout | Major | . | Milind Bhandarkar | Milind Bhandarkar