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Posted to mapreduce-issues@hadoop.apache.org by "Akira AJISAKA (JIRA)" <ji...@apache.org> on 2016/06/17 02:10:05 UTC
[jira] [Commented] (MAPREDUCE-6542) HistoryViewer uses
SimpleDateFormat, but SimpleDateFormat is not threadsafe
[ https://issues.apache.org/jira/browse/MAPREDUCE-6542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15335222#comment-15335222 ]
Akira AJISAKA commented on MAPREDUCE-6542:
------------------------------------------
The patch cannot be applied to branch-2.8. Hi [~piaoyu zhang], would you rebase the patch for branch-2.8?
> HistoryViewer uses SimpleDateFormat, but SimpleDateFormat is not threadsafe
> ---------------------------------------------------------------------------
>
> Key: MAPREDUCE-6542
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6542
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobhistoryserver
> Affects Versions: 2.2.0, 2.7.1
> Environment: CentOS6.5 Hadoop
> Reporter: zhangyubiao
> Assignee: zhangyubiao
> Attachments: MAPREDUCE-6542-v10.patch, MAPREDUCE-6542-v11.patch, MAPREDUCE-6542-v12.patch, MAPREDUCE-6542-v13.patch, MAPREDUCE-6542-v14.patch, MAPREDUCE-6542-v15.patch, MAPREDUCE-6542-v16.patch, MAPREDUCE-6542-v2.patch, MAPREDUCE-6542-v3.patch, MAPREDUCE-6542-v4.patch, MAPREDUCE-6542-v5.patch, MAPREDUCE-6542-v6.patch, MAPREDUCE-6542-v7.patch, MAPREDUCE-6542-v8.patch, MAPREDUCE-6542-v9.patch, MAPREDUCE-6542.patch
>
>
> I use SimpleDateFormat to Parse the JobHistory File before
> {code}
> private static final SimpleDateFormat dateFormat =
> new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
> public static String getJobDetail(JobInfo job) {
> StringBuffer jobDetails = new StringBuffer("");
> SummarizedJob ts = new SummarizedJob(job);
> jobDetails.append(job.getJobId().toString().trim()).append("\t");
> jobDetails.append(job.getUsername()).append("\t");
> jobDetails.append(job.getJobname().replaceAll("\\n", "")).append("\t");
> jobDetails.append(job.getJobQueueName()).append("\t");
> jobDetails.append(job.getPriority()).append("\t");
> jobDetails.append(job.getJobConfPath()).append("\t");
> jobDetails.append(job.getUberized()).append("\t");
> jobDetails.append(dateFormat.format(job.getSubmitTime())).append("\t");
> jobDetails.append(dateFormat.format(job.getLaunchTime())).append("\t");
> jobDetails.append(dateFormat.format(job.getFinishTime())).append("\t");
> return jobDetails.toString();
> }
> {code}
> But I find I query the SubmitTime and LaunchTime in hive and compare JobHistory File time , I find that the submitTime and launchTime was wrong.
> Finally,I change to use the FastDateFormat to parse the time format and the time become right
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