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https://issues.apache.org/jira/browse/MAPREDUCE-6542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15330111#comment-15330111
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Akira AJISAKA commented on MAPREDUCE-6542:
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Thanks [~piaoyu zhang] for the long work and thanks [~templedf] for the reviews!
Would you deprecate {{getFormattedTimeWithDiff(DateFormat, long, long)}} for
developers to avoid using this method? I'm +1 if that is addressed. If we
deprecated this, we can remove it in the next minor version (2.8.0 or 2.9.0)
because {{StringUtils}} is not {{@Public}}.
By the way, I prefer to use Date and Time API (JSR-310), which is newly
introduced in JDK8. However, we cannot use this API in branch-2 because
branch-2 supports both JDK7 and JDK8 :(
> HistoryViewer use 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-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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