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https://issues.apache.org/jira/browse/HDFS-1433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12916614#action_12916614
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Suresh Srinivas commented on HDFS-1433:
---------------------------------------

The removed private constructor was used in Datanode to create 
SimulatedFSDataset using reflection, in the code below:
{noformat}
this.data = (FSDatasetInterface) ReflectionUtils.newInstance(
                   
Class.forName("org.apache.hadoop.hdfs.server.datanode.SimulatedFSDataset"), 
conf);
{noformat}

Removed constructor resulted in failure of tests that depended on the above 
code.

> Fix test failures - TestPread and TestFileLimit
> -----------------------------------------------
>
>                 Key: HDFS-1433
>                 URL: https://issues.apache.org/jira/browse/HDFS-1433
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.22.0
>         Environment: These test failures were introduced by HDFS-1417 due to 
> removal default contructor in SimulatedFsDataSet.
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.22.0
>
>         Attachments: HDFS-1433.patch
>
>


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