[jira] Commented: (HADOOP-1272) Extract InnerClasses from FSNamesystem into separate classes

["Tom White (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-1272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490261 ] 

Tom White commented on HADOOP-1272:
-----------------------------------

This will also make the code clearer by breaking up the huge class into smaller chunks (FSNamesystem is over 4000 lines long!). The top ten:

find src/java/org/apache/hadoop -name *.java | xargs wc -l | sort -nr | head
  68614 total
   4277 src/java/org/apache/hadoop/dfs/FSNamesystem.java
   2682 src/java/org/apache/hadoop/io/SequenceFile.java
   1960 src/java/org/apache/hadoop/mapred/TaskTracker.java
   1717 src/java/org/apache/hadoop/mapred/JobTracker.java
   1440 src/java/org/apache/hadoop/dfs/DFSClient.java
   1309 src/java/org/apache/hadoop/dfs/DataNode.java
   1208 src/java/org/apache/hadoop/mapred/ReduceTask.java
   1095 src/java/org/apache/hadoop/fs/FsShell.java
    964 src/java/org/apache/hadoop/mapred/JobInProgress.java

> Extract InnerClasses from FSNamesystem into separate classes
> ------------------------------------------------------------
>
>                 Key: HADOOP-1272
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1272
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>            Reporter: dhruba borthakur
>         Assigned To: dhruba borthakur
>         Attachments: innerclasses.patch
>
>
> This will make the code cleaner. Also, it leads itself to a cleaner and easily understandable finer-grain locking model.

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