This document tracks on-going efforts to upgrade from Hadoop 2.x to Hadoop 3.x - Refer Umbrella Jira HADOOP-15501 for current status on this.
Upgrade Tests
The following scenarios were tested while upgrading from Hadoop 2.8.4 to Hadoop 3.1.0
Type | Component | Scenario | Issues Found | Workaround | Overall Status |
---|---|---|---|---|---|
EXPRESS UPGRADE | HDFS | Starting NameNode/DataNode with custom MetricsPlugin configured in hadoop2-metrics.properties |
| Replace MetricsPlugin implementation jars( eg: HadoopTimelineMetricsSink) with recompilked jars which use package "org.apache.commons.configuration2" | |
EXPRESS UPGRADE | YARN | Starting YARN daemons | |||
ROLLING UPGRADE | HDFS | NN is started with rollingUpgrade with default policy configured for Erasure coding |
| Not known | |
ROLLING UPGRADE | YARN |
| |||