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https://issues.apache.org/jira/browse/YARN-5167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15369800#comment-15369800
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Hudson commented on YARN-5167:
------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #10074 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10074/])
YARN-5167. Escape occurences of encodedValues. (Sangjin Lee via Varun (sjlee:
rev c65020075ea090b37810ffef885a2bee486f4cf8)
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/test/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/TestSeparator.java
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/Separator.java
> Escaping occurences of encodedValues
> ------------------------------------
>
> Key: YARN-5167
> URL: https://issues.apache.org/jira/browse/YARN-5167
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Joep Rottinghuis
> Assignee: Sangjin Lee
> Priority: Critical
> Labels: yarn-2928-1st-milestone
> Fix For: YARN-2928
>
> Attachments: YARN-5167-YARN-2928.01.patch,
> YARN-5167-YARN-2928.02.patch, YARN-5167-YARN-2928.03.patch
>
>
> We had earlier decided to punt on this, but in discussing YARN-5109 we
> thought it would be best to just be safe rather than sorry later on.
> Encoded sequences can occur in the original string, especially in case of
> "foreign key" if we decide to have lookups.
> For example, space is encoded as %2$.
> Encoding "String with %2$ in it" would decode to "String with in it".
> We though we should first escape existing occurrences of encoded strings by
> prefixing a backslash (even if there is already a backslash that should be
> ok). Then we should replace all unencoded strings.
> On the way out, we should replace all occurrences of our encoded string to
> the original except when it is prefixed by an escape character. Lastly we
> should strip off the one additional backslash in front of each remaining
> (escaped) sequence.
> If we add the following entry to TestSeparator#testEncodeDecode() that
> demonstrates what this jira should accomplish:
> {code}
> testEncodeDecode("Double-escape %2$ and %3$ or \\%2$ or \\%3$, nor
> \\\\%2$ = no problem!", Separator.QUALIFIERS,
> Separator.VALUES, Separator.SPACE, Separator.TAB);
> {code}
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