[HBASE-10638] Improve error message when there is no region server available for move

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.98.1, 0.99.0
• Hadoop Flags: Reviewed
• Assignee: Ted Yu
• Reporter: Ted Yu
• Created: 28/Feb/14 16:15
• Updated: 21/Feb/15 23:33
• Resolved: 05/Mar/14 22:56

Description

When there is no region server available to move regions to, we would see:

Valid region move targets:
TypeError: can't convert nil into String
        __for__ at /usr/lib/hbase/bin/region_mover.rb:336
           call at org/jruby/RubyProc.java:270
           call at org/jruby/RubyProc.java:220
           each at file:/usr/lib/hbase/lib/jruby-complete-1.6.5.jar!/builtin/java/java.util.rb:7
  unloadRegions at /usr/lib/hbase/bin/region_mover.rb:333
         (root) at /usr/lib/hbase/bin/region_mover.rb:471

Better error message / exit code should be provided.