[HBASE-20645] Fix security_available method in security.rb

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 3.0.0-alpha-1, 2.1.0, 2.0.1
• Hadoop Flags: Reviewed
• Assignee: Ankit Singhal
• Reporter: Ankit Singhal
• Created: 25/May/18 00:32
• Updated: 01/Aug/18 06:20
• Resolved: 29/May/18 15:50

Description

"exists?" method expects parameter tableName to be String but ACL_TABLE_NAME is of org.apache.hadoop.hbase.TableName form.

raise(ArgumentError, 'DISABLED: Security features are not available') unless \
          exists?(org.apache.hadoop.hbase.security.access.AccessControlLists::ACL_TABLE_NAME.getNameAsString)

Impact of the bug:-
So , if a user is running any security related command(revoke,user_permission) and there is an exception(MasterNotRunning) while checking security capabilities, then instead of seeing the underlying exception, user is seeing

ERROR: no method 'valueOf' for arguments (org.apache.hadoop.hbase.TableName) on Java::OrgApacheHadoopHbase::TableName
  available overloads:
    (java.lang.String)
    (byte[])