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Posted to yarn-issues@hadoop.apache.org by "Varun Saxena (JIRA)" <ji...@apache.org> on 2016/05/20 21:11:13 UTC
[jira] [Comment Edited] (YARN-5109) timestamps are stored unencoded
causing parse errors
[ https://issues.apache.org/jira/browse/YARN-5109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15294198#comment-15294198 ]
Varun Saxena edited comment on YARN-5109 at 5/20/16 9:10 PM:
-------------------------------------------------------------
Just to update, the patch is almost complete.
Will have it up by tomorrow. The UT failures reported above have been fixed.
The pending part in the patch is with regards to removing getCompoundColQualBytes method and how to handle it as we use it while creating filters. As of now, getColumnPrefix method should work well. We will have to probably store reference to converters in ColumnPrefix class implementations then.
Also some javadocs need to be added.
was (Author: varun_saxena):
Just to update, the patch is almost complete.
Will have it up by
> 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
> Attachments: YARN-5109-YARN-2928.01.patch, YARN-5109-YARN-2928.02.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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