[HADOOP-7089] Fix link resolution logic in hadoop-config.sh

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.22.0, 0.23.0
• Component/s: scripts
• Hadoop Flags: Reviewed
• Release Note: Updates hadoop-config.sh to always resolve symlinks when determining HADOOP_HOME. Bash built-ins or POSIX:2001 compliant cmds are now required.
• Assignee: Eli Collins
• Reporter: Eli Collins
• Created: 06/Jan/11 01:55
• Updated: 19/Jan/11 07:13
• Resolved: 14/Jan/11 08:06

Description

The link resolution logic in bin/hadoop-config.sh fails when when executed via a symlink, from the root directory. We can replace this logic with cd -P and pwd -P, which should be portable across Linux, Solaris, BSD, and OSX.

Issue Links

• is related to: ZOOKEEPER-303 Bin scripts don't work on Mac
• is related to: HADOOP-7092 Consolidate startup shell scripts
• relates to: HDFS-1569 Use readlink to get absolute paths in the scripts
• relates to: MAPREDUCE-2247 Use readlink to get absolute paths in the scripts