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From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9387) Parse namenodeUri parameter only once in NNThroughputBenchmark$OperationStatsBase#verifyOpArgument()
Date Fri, 06 Nov 2015 00:25:27 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mingliang Liu updated HDFS-9387:
--------------------------------
    Attachment: HDFS-9387.000.patch

> Parse namenodeUri parameter only once in NNThroughputBenchmark$OperationStatsBase#verifyOpArgument()
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-9387
>                 URL: https://issues.apache.org/jira/browse/HDFS-9387
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Mingliang Liu
>            Assignee: Mingliang Liu
>         Attachments: HDFS-9387.000.patch
>
>
> In {{NNThroughputBenchmark$OperationStatsBase#verifyOpArgument()}}, the   {{namenodeUri}}
is always parsed from {{-namenode}} argument. This works just fine if the {{-op}} parameter
is not {{all}}, as the single benchmark will need to parse the {{namenodeUri}} from args anyway.
> When the {{-op}} is {{all}}, namely all sub-benchmark will run, multiple sub-benchmark
will call the {{verifyOpArgument()}} method. In this case, the first sub-benchmark reads the
{{namenode}} argument and removes it from args. The other sub-benchmarks will thereafter read
{{null}} value since the argument is removed. This contradicts the intension of providing
{{namenode}} for all sub-benchmarks.
> {code:title=current code}
>       try {
>         namenodeUri = StringUtils.popOptionWithArgument("-namenode", args);
>       } catch (IllegalArgumentException iae) {
>         printUsage();
>       }
> {code}
> The fix is to parse the {{namenodeUri}}, which is shared by all sub-benchmarks, from
{{-namenode}} argument only once. This follows the convention of parsing other global arguments
in {{OperationStatsBase#verifyOpArgument()}}.
> {code:title=simple fix}
>       if (args.indexOf("-namenode") >= 0) {
>         try {
>           namenodeUri = StringUtils.popOptionWithArgument("-namenode", args);
>         } catch (IllegalArgumentException iae) {
>           printUsage();
>         }
>       }
> {code}



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