title: sqlplus remote connection giving ORA-21561
body: <p>I have installed sqlplus based on instruction given <a href="https://stackoverflow.com/questions/23488394/how-to-install-sql-plus-client-in-linux">here</a>   </p>
  
  <pre><code>sqlplus 'username/password@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.0.100)(PORT=1521))(CONNECT_DATA=(SID=ORCL)))'
  </code></pre>
  
  <p>This is giving me error </p>
  
  <pre><code>SQL*Plus: Release 11.2.0.4.0 Production on Fri Jul 10 16:10:38 2015
  
  Copyright (c) 1982, 2013, Oracle.  All rights reserved.
  
  ERROR:
  ORA-21561: OID generation failed
  
  
  Enter user-name: 
  </code></pre>
  
  <p>What is the solution for this problem?</p>
  
  <p>PS: I have already added hostname and hosts have already have value.</p>