[jira] Created: (HDFS-1611) Some logical issues need to address.

["Uma Maheswara Rao G (JIRA)" <ji...@apache.org>]

Some logical issues need to address.
------------------------------------

                 Key: HDFS-1611
                 URL: https://issues.apache.org/jira/browse/HDFS-1611
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs client, name-node
    Affects Versions: 0.20.2, 0.20.1
            Reporter: Uma Maheswara Rao G
            Priority: Minor


Title: Some code level logical issues.

Description:

1. DFSClient:  
  Consider the below case, if we enable only info, then below log will never be logged.
 if (ClientDatanodeProtocol.LOG.isDebugEnabled()) {
      ClientDatanodeProtocol.LOG.info("ClientDatanodeProtocol addr=" + addr);
    }

2.org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerMBean()
  
  catch (NotCompliantMBeanException e) {
      e.printStackTrace();
    }

  We can avoid using stackTace(). Better to add log message.  

3. In  org.apache.hadoop.hdfs.server.namenode.FSImage
    since SimpleDateFormat is not a thread safe, we can move that to local to the method.
private static final SimpleDateFormat DATE_FORM =
    new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

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