[HDFS-2686] Remove DistributedUpgrade related code

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 2.0.0-alpha
• Fix Version/s: 2.0.2-alpha
• Component/s: datanode, namenode
• Target Version/s: 2.0.2-alpha
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: This jira removes functionality that has not been used/applicable since release 0.17. The incompatibility introduced by this change will not affect any HDFS users.
• Assignee: Suresh Srinivas
• Reporter: Todd Lipcon
• Created: 15/Dec/11 08:30
• Updated: 22/Apr/15 13:15
• Resolved: 21/Aug/12 21:19

Description

A distributed upgrade framework was introduced long ago in HADOOP-1286 but was only used twice throughout history, and not since 0.17, where it was considered buggy (see HADOOP-3677). This is a lot of clutter in our codebase - let's consider removing it?

Issue Links

• breaks: BIGTOP-876 TestDFSAdmin in hadoop-smoke is outdated and still relies on presence of -upgradeProgress
• duplicates: HADOOP-1286 Distributed cluster upgrade
• is related to: HDFS-6225 Remove the o.a.h.hdfs.server.common.UpgradeStatusReport
• relates to: HDFS-8222 Remove usage of "dfsadmin -upgradeProgress " from document which is no longer supported
• relates to: HDFS-3832 Remove protocol methods related to DistributedUpgrade