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https://issues.apache.org/jira/browse/HDFS-8385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16385219#comment-16385219
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genericqa commented on HDFS-8385:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  5s{color} 
| {color:red} HDFS-8385 does not apply to trunk. Rebase required? Wrong Branch? 
See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HDFS-8385 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12735532/HDFS-8385.3.patch |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/23285/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Remove unused entities (variables,methods and configurations) 
> --------------------------------------------------------------
>
>                 Key: HDFS-8385
>                 URL: https://issues.apache.org/jira/browse/HDFS-8385
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: J.Andreina
>            Assignee: J.Andreina
>            Priority: Major
>         Attachments: HDFS-8385.1.patch, HDFS-8385.2.patch, HDFS-8385.3.patch
>
>
> Below are few unused constants , methods and configurations which can be 
> removed.
> *DfsClientConf*
>   public ChecksumOpt getDefaultChecksumOpt() {
>     return defaultChecksumOpt;
>   }
> *HdfsServerConstants*
>   long LEASE_RECOVER_PERIOD = 10 * 1000; // in ms
>   public static final String  DFS_STREAM_BUFFER_SIZE_KEY = 
> "dfs.stream-buffer-size";
>   public static final int     DFS_STREAM_BUFFER_SIZE_DEFAULT = 4096;
> *CommonConfigurationKeys*
>   public static final String  FS_HOME_DIR_KEY = "fs.homeDir";
>   public static final String  FS_HOME_DIR_DEFAULT = "/user";
>   public static final String  IO_COMPRESSION_CODEC_LZO_BUFFERSIZE_KEY =
>     "io.compression.codec.lzo.buffersize";
>   public static final String IO_COMPRESSION_CODEC_SNAPPY_BUFFERSIZE_KEY =
>       "io.compression.codec.snappy.buffersize";



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