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Date: Sat, 21 Oct 2017 06:06:44 +0000 (UTC)
From: "Varun Saxena (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12970624.1463547374000.25047.1508566004163@Atlassian.JIRA>
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Subject: [jira] [Updated] (YARN-5109) timestamps are stored unencoded
 causing parse errors
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archived-at: Sat, 21 Oct 2017 06:06:58 -0000


     [ https://issues.apache.org/jira/browse/YARN-5109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Varun Saxena updated YARN-5109:
-------------------------------
    Fix Version/s: 2.9.0

> timestamps are stored unencoded causing parse errors
> ----------------------------------------------------
>
>                 Key: YARN-5109
>                 URL: https://issues.apache.org/jira/browse/YARN-5109
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Varun Saxena
>            Priority: Blocker
>              Labels: yarn-2928-1st-milestone
>             Fix For: 2.9.0, 3.0.0-alpha1
>
>         Attachments: YARN-5109-YARN-2928.003.patch, YARN-5109-YARN-2928.01.patch, YARN-5109-YARN-2928.02.patch, YARN-5109-YARN-2928.03.patch, YARN-5109-YARN-2928.04.patch, YARN-5109-YARN-2928.05.patch, YARN-5109-YARN-2928.06.patch, YARN-5109-YARN-2928.07.patch, YARN-5109-YARN-2928.08.patch
>
>
> When we store timestamps (for example as part of the row key or part of the column name for an event), the bytes are used as is without any encoding. If the byte value happens to contain a separator character we use (e.g. "!" or "="), it causes a parse failure when we read it.
> I came across this while looking into this error in the timeline reader:
> {noformat}
> 2016-05-17 21:28:38,643 WARN org.apache.hadoop.yarn.server.timelineservice.storage.common.TimelineStorageUtils: incorrectly formatted column name: it will be discarded
> {noformat}
> I traced the data that was causing this, and the column name (for the event) was the following:
> {noformat}
> i:e!YARN_RM_CONTAINER_CREATED=\x7F\xFF\xFE\xABDY=\x99=YARN_CONTAINER_ALLOCATED_HOST
> {noformat}
> Note that the column name is supposed to be of the format (event id)=(timestamp)=(event info key). However, observe the timestamp portion:
> {noformat}
> \x7F\xFF\xFE\xABDY=\x99
> {noformat}
> The presence of the separator ("=") causes the parse error.


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