[HBASE-10056] region_status.rb not adopted to 0.96 api

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.98.0, 0.96.2
• Component/s: scripts

Environment

x86_64 GNU/Linux

• Hadoop Flags: Reviewed
• Assignee: Samir Ahmic
• Reporter: Samir Ahmic
• Created: 28/Nov/13 14:34
• Updated: 20/Nov/15 11:55
• Resolved: 28/Nov/13 18:00

Description

When I tried to run this script agains 0.96 cluster i got this error:

$ hbase org.jruby.Main region_status.rb
NameError: uninitialized constant IOException
  const_missing at org/jruby/RubyModule.java:2647
         (root) at region_status.rb:104

This line is causing issue:

table = HTable.new config, '.META.'.to_java_bytes

I belive this should be changed to:

table = HTable.new config, 'hbase:meta'.to_java_bytes

Second issue was caused by this line

server_count = MetaScanner::allTableRegions(config,$tablename.to_java_bytes,false).size()

MetaScanner.allTablesRegion() is changed in 0.96 so i changed few lines in order to fix this:

if not $tablename.nil?
 # Creating TableName object
  $TableName = HTableDescriptor.new($tablename.to_java_bytes).getTableName()
end
while true
  if $tablename.nil?
    server_count = admin.getClusterStatus().getRegionsCount()
  else
    #Creating HConnection object
    connection = HConnectionManager::getConnection(config);
    server_count = MetaScanner::allTableRegions(config, connection, $TableName ,false).size()
  end
  print "Region Status: #{server_count} / #{meta_count}\n"

After this changes script is working against 0.96. Since i'm far away from expert in jruby can someone review this fix ? I will attach patch.