[MESOS-2390] HADOOP_HOME no longer works with fetcher

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.22.0
• Component/s: fetcher
• Labels: fetcher hadoop hdfs mesosphere
• Target Version/s: 0.22.0
• Sprint: Mesosphere Q1 Sprint 4 - 3/6
• Assignee: Bernd Mathiske
• Reporter: Adam B
• Shepherd: Adam B
• Created: 23/Feb/15 23:53
• Updated: 26/Apr/17 16:45
• Resolved: 27/Feb/15 00:34

Description

As of commit "699e638ef80739203ed38ba7238bbc176b107355 Consolidate all fetcher env vars into one that holds a JSON object." the HADOOP_HOME environment variable is no longer set when starting the fetcher, which means that hdfs.hpp's HDFS() will no longer look for the hadoop binary inside the user-provided HADOOP_HOME, whether it was specified via --hadoop_home or the HADOOP_HOME env variable.
This is a regression in functionality from Mesos 0.21 and before, and breaks the use of HDFS when not installed in the slave's PATH. The future fetcher patch(es) for 0.23+ fixes this, but we need something in 0.22 to prevent regression.