[HDFS-9000] Allow reconfiguration without restart for parameters where applicable.

• Type: Improvement
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.7.0
• Assignee: Xiaobing Zhou
• Reporter: Xiaobing Zhou
• Created: 01/Sep/15 17:54
• Updated: 02/Mar/18 14:15

Description

Many parameters can be re-configured without requiring a restart.

Issue Links

• Parent Feature: HDFS-12085 Reconfigure namenode heartbeat interval fails if the interval was set with time unit

Sub-Tasks

• Support reconfiguring dfs.datanode.duplicate.replica.deletion without DN restart: Patch Available
• Support reconfiguring dfs.datanode.lazywriter.interval.sec without DN restart: Patch Available
• Support reconfiguring namenode replication confs: Patch Available
• Discover conf parameters that need no DataNode restart to make changes effective: In Progress
• Add HTTP servlet support for NameNode reconfiguration: Open
• Add HTTP servlet support for DataNode reconfiguration: Open
• Push up NameNode#conf to base class: Open