Re: Switching default-java to OpenJDK7

[James Page <james.page@canonical.com>]

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Hi Team

On 14/11/11 23:46, Damien Raude-Morvan wrote:
> Have you noticed a common FTBFS pattern for all this packages ? Or all
failure
> seems differents ?
I've spent the morning doing more analysis on the bugs detected during
this rebuild and it looks like there are some distinct patterns to the
failures.

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+encoding
(40)

    error: unmappable character for encoding ASCII either during javac
or javadoc.

    This issue constitutes that largest number of build failures;
something has changed with respect to what OpenJDK 7 considers to be an
encoding error rather than warning.

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+api
(14)

    Package does not implement new public API requirements for Java 7;
normally something JDBC related and relatively easy to fix.

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+lang
(10)

    Some sort of language handling change (typically generics handling)
causes the build failure e.g:

        error: name clash: boxedFor(Class<? extends Boxed>,long) in
org.gnome.gdk.Plumbing and boxedFor(Class<?>,long) in
org.gnome.glib.Plumbing have the same erasure, yet neither hides the other

    Again needs fixing upstream - I suspect that these again will follow
specific patterns with stock fixes.

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+maven
(6)

    Maven 2 not parsing warning error message causing failure:
    could not parse error message: warning: [options] bootstrap class
path not set in conjunction with -source 1.5

    Bug in Maven 2?  Might be easily resolvable.

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+priv-api
(4)

    Package makes use of private API no longer present or changed in
Java 7; harder to fix as requires use of different API or significant
refactoring; best worked out with upstream.

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+java-home
(4)

    Problems with JAVA_HOME in rules not matching default-java i.e.
using openjdk6 explicitly, fixable in packaging

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+test
(3)

    Failure in test suite caused build failure.

https://bugs.launchpad.net/ubuntu/+bugs?search=Search&field.bug_reporter=james-page&field.tags_combinator=ALL&field.tag=java7-ftbfs+fop
(3)

    [exec] org.apache.fop.apps.FOPException: Can't load standard
profile: sRGB.pf

    I think this is related to
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=641530 in openjdk-6

I'm aiming to start working through this list next week.

I'll re-confirm each against Debian unstable and aim to get fixes into
Debian first.  How would people feel about switching default-java in
experimental to OpenJDK7 to help support this transition?

Anything that can't be resolved above the individual package level i.e.
with a fix in OpenJDK/Maven or suchlike I will raise as a bug in Debian
(and upstream if required) for tracking purposes.

Cheers

James

P.S. Any help much appreciated!

- -- 
James Page
Software Engineer, Ubuntu Server Team
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