Given that the other patches will likely make their way upstream (sans Jetty), does it
make sense to carry that patch and apply separately allowing for (EP)/EL %wrappers to
enable/disable based on distribution?
Are any other patches that may cause an issue? Also does the previous jasper patch roll in
now with the Jetty9 patch?
----- Original Message -----
From: "Peter MacKinnon" <pmackinn(a)redhat.com>
Sent: Friday, July 19, 2013 1:08:49 PM
Subject: Jetty 9 implications for Hadoop 2.x in Fedora
The Fedora Hadoop 2.x initiative began development several months ago
on the stability of the released F18 distro. Now that F19 is released we
have rebased the packaging work on the various newer dependencies offered by
F19. One significant change is that Jetty 8.1.x is no longer available and
has made way for the latest version (9.0.x). This has introduced several API
changes, particularly in the SSL API. It also has some benefit in that Jetty
9 incorporates a JSP compilation maven plugin which is required by the
Hadoop build. The upstream version of Hadoop relies on a combination of
Tomcat 5.5, Jetty 6.1.x, and the Codehaus jspc plugin for this step.
However, F19 provides Tomcat 7 which is incompatible for this scenario with
the Jetty container. The Jetty 9 version is Glassfish-based.
An important consideration for this change is that Jetty 9 is
incompatible with Java 6 and only supported on Java 7, obviously the only
version available in the current Fedora package repositories. Thus, the
forthcoming Hadoop packaged jars for Fedora will also only be incompatible
with the now EOL Oracle JRE 6 that Apache upstream uses for its current
The Hadoop packaging team feels that the reasonable path forward is
the Hadoop build for Jetty 9 and eschew any and all Java 6 support for those
bits. However, it does carry the caveat that there may be corner cases of
behavioral or JVM-related differences in certain tests and use cases. The
packaging team continually examines the Fedora Hadoop builds for
"correctness" using the source tree JUnit test suite as well as basic smoke
testing. Test-related problems have been identified and compensated for
already once they are comprehended.
Fedora Software Collections are of interest to the Hadoop packaging
their suitability for this project and the current FPG policies regarding
their official usage require further investigation.
Please let us know if you have any questions or concerns regarding
MRG Grid/Big Data
Red Hat Inc.
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