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https://issues.apache.org/jira/browse/MAPREDUCE-7089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16921144#comment-16921144
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Hadoop QA commented on MAPREDUCE-7089:
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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 11s{color}
| {color:red} https://github.com/apache/hadoop/pull/454 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 | MAPREDUCE-7089 |
| Console output |
https://builds.apache.org/job/hadoop-multibranch/job/PR-454/9/console |
| versions | git=2.17.1 |
| Powered by | Apache Yetus 0.10.0 http://yetus.apache.org |
This message was automatically generated.
> ReadMapper.doIO hangs with user misconfigured inputs
> ----------------------------------------------------
>
> Key: MAPREDUCE-7089
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7089
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: client, test
> Affects Versions: 2.5.0
> Reporter: John Doe
> Priority: Minor
>
> When a user configures the bufferSize to be 0, the while loop in
> TestDFSIO$ReadMapper.doIO function hangs endlessly.
> This is because the loop stride, curSize is always 0, making the loop index
> actualSize always less than the upper bound totalSize.
> Here is the code snippet.
> {code:java}
> int bufferSize = DEFAULT_BUFFER_SIZE;
> for(int i = 0; i < args.length; i++) { // parse command line
> ...
> else if (args[i].equals("-bufferSize")) {
> bufferSize = Integer.parseInt(args[++i]);
> }
> ...
> }
> public Long doIO(Reporter reporter, String name, long totalSize) throws
> IOException {
> InputStream in = (InputStream)this.stream;
> long actualSize = 0;
> while (actualSize < totalSize) {
> int curSize = in.read(buffer, 0, bufferSize);
> if(curSize < 0) break;
> actualSize += curSize;
> reporter.setStatus("reading " + name + "@" + actualSize + "/" + totalSize
> + " ::host = " + hostName);
> }
> return Long.valueOf(actualSize);
> }
> {code}
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