Hi YARN and MapReduce developers,
I'm working for Java 9 support and created a patch to replace '_' with
'__' in the hamlet framework (org.apache.hadoop.yarn.webapp.hamlet) used
by YARN and MapReduce webapp. In Java 9 '_' as a one-character
identifier is banned.
https://issues.apache.org/jira/browse/HADOOP-11875
In the patch, new package hamlet2 with '__' is created and the old
package is kept because downstream projects are using hamlet (e.g.
Apache Slider). And I added a setting for Java 9 not to compile the old
package.
I'll really appreciate if you will review my patch.
Regards,
Akira
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