[HADOOP-8719] Workaround for kerberos-related log errors upon running any hadoop command on OSX

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha
• Fix Version/s: 3.0.0-alpha1
• Component/s: scripts

Environment

Mac OS X 10.7, Java 1.6.0_26

• Hadoop Flags: Reviewed
• Assignee: Jianbin Wei
• Reporter: Jianbin Wei
• Created: 22/Aug/12 04:54
• Updated: 07/Feb/19 16:44
• Resolved: 11/Jul/14 06:04

Description

When starting Hadoop on OS X 10.7 ("Lion") using start-all.sh, Hadoop logs the following errors:
2011-07-28 11:45:31.469 java[77427:1a03] Unable to load realm info from SCDynamicStore
Hadoop does seem to function properly despite this.

The workaround takes only 10 minutes.

There are numerous discussions about this:
google "Unable to load realm mapping info from SCDynamicStore" returns 1770 hits. Each one has many discussions.

Assume each discussion take only 5 minute, a 10-minute fix can save ~150 hours. This does not count much search of this issue and its solution/workaround, which can easily hit (wasted) thousands of hours!!!

Issue Links

• causes: HADOOP-15966 Hadoop Kerberos broken on macos as java.security.krb5.realm is reset: Null realm name (601)
• is a clone of: HADOOP-7489 Hadoop logs errors upon startup on OS X 10.7