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https://issues.apache.org/jira/browse/HADOOP-14508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16055320#comment-16055320
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wenxin he commented on HADOOP-14508:
------------------------------------
hi [~shv], sorry to disturb you.
Would you mind reviewing this patch?
When I use TestDFSIO to benchmark hdfs, I found using -seq options can let
TestDFSIO writing files to hdfs straightly without mr. But I got a NPE when
using -seq.
I found TestDFSIO#sequentialTest was broken when we refactoring TestDFSIO, so I
try to fix this issue.
Now, Hadoop QA passed.
I also tested several use cases below.
So, would you mind reviewing this? Thanks for you comments.
{code}
hadoop jar hadoop-mapreduce-client-jobclient-3.0.0-alpha4-SNAPSHOT-tests.jar
TestDFSIO -write -seq -size 1GB
hadoop jar hadoop-mapreduce-client-jobclient-3.0.0-alpha4-SNAPSHOT-tests.jar
TestDFSIO -read -seq -size 1GB
hadoop jar hadoop-mapreduce-client-jobclient-3.0.0-alpha4-SNAPSHOT-tests.jar
TestDFSIO -read -seq -random -size 1GB
hadoop jar hadoop-mapreduce-client-jobclient-3.0.0-alpha4-SNAPSHOT-tests.jar
TestDFSIO -read -seq -skipSize 1024 -size 1GB
hadoop jar hadoop-mapreduce-client-jobclient-3.0.0-alpha4-SNAPSHOT-tests.jar
TestDFSIO -append -seq -size 1GB
hadoop jar hadoop-mapreduce-client-jobclient-3.0.0-alpha4-SNAPSHOT-tests.jar
TestDFSIO -truncate -seq -size 1GB
{code}
> TestDFSIO throws NPE when set -sequential argument.
> ---------------------------------------------------
>
> Key: HADOOP-14508
> URL: https://issues.apache.org/jira/browse/HADOOP-14508
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha4
> Reporter: wenxin he
> Assignee: wenxin he
> Attachments: HADOOP-14508.002.patch
>
>
> Benchmark tool TestDFSIO throws NPE when set {{-sequential}} due to
> uninitialized {{ioer.stream}} in {{TestDFSIO#sequentialTest}}.
> More descriptions, stack traces see comments.
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