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https://issues.apache.org/jira/browse/HADOOP-11875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15126413#comment-15126413
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Steve Loughran commented on HADOOP-11875:
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# Hamlet is easy to use from Java code. What do you want, us to switch to JSP?
# It's used in downstream YARN apps, which is not just done out of laziness,
but to handle the proxy renaming stuff, plus escaping of text.
Because of #2, Hamlet is going to have to stay around, even if something to
replace it is added alongside (or just pulled in from elsewhere)
> [JDK8] Renaming _ as a one-character identifier to another identifier
> ---------------------------------------------------------------------
>
> Key: HADOOP-11875
> URL: https://issues.apache.org/jira/browse/HADOOP-11875
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Tsuyoshi Ozawa
> Labels: newbie
> Attachments: build_error_dump.txt
>
>
> From JDK8, _ as a one-character identifier is disallowed. Currently Web UI
> uses it. We should fix them to compile with JDK8.
> https://bugs.openjdk.java.net/browse/JDK-8061549
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