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https://issues.apache.org/jira/browse/HDFS-14481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16838312#comment-16838312
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Jinglun commented on HDFS-14481:
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Hi [~dustinday], the BUFFER_SIZE has got a default value, and anyone who wants
a different value should takes care of the new value and makes sure it's
reasonable. So in my view it's not a bug and we can leave it the way it is
!/jira/images/icons/emoticons/smile.png|width=16,height=16! .
> BenchmarkThroughput.writeLocalFile hangs with misconfigured BUFFER_SIZE
> -----------------------------------------------------------------------
>
> Key: HDFS-14481
> URL: https://issues.apache.org/jira/browse/HDFS-14481
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 2.5.0
> Reporter: John Doe
> Priority: Major
>
> When the configuration file is corrupted, reading BUFFER_SIZE from corrupted
> conf can return 0.
> The "for" loop in BenchmarkThroughput.writeLocalFile function hangs
> endlessly.
> Here is the code snippet.
> {code:java}
> BUFFER_SIZE = conf.getInt("dfsthroughput.buffer.size", 4 * 1024);
> private Path writeLocalFile(String name, Configuration conf,
> long total) throws IOException {
> Path path = dir.getLocalPathForWrite(name, total, conf);
> System.out.print("Writing " + name);
> resetMeasurements();
> OutputStream out = new FileOutputStream(new File(path.toString()));
> byte[] data = new byte[BUFFER_SIZE];
> for(long size=0; size < total; size += BUFFER_SIZE) {//Bug!!!
> System.out.println("inside for loop...size = " + size);
> out.write(data);
> }
> out.close();
> printMeasurements();
> return path;
> }
> {code}
> This configuration error also affects HDFS-13513, HDFS-13514
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