Debian Bug report logs - #679036
openjdk-7-jre: Prints "MEvent. CASE!" to the console on certain mouse events

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Erich Schubert <erich@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: openjdk-7-jre: Prints "MEvent. CASE!" to the console on certain mouse events

Date: Mon, 25 Jun 2012 23:34:39 +0200

Package: openjdk-7-jre
Version: 7~u3-2.1.1-1
Severity: normal
Tags: upstream patch

Certain actions (I'm no sure which one, I havn't been able to reproduce them
reliably) will cause this message to be printed.  This does not happen with
OpenJDK6, and it did not happen in Sun Java6.
I've seen them occur in multiple applications, for example in current MediathekView,
from http://zdfmediathk.sourceforge.net/

See also:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7130140
http://hg.openjdk.java.net/jdk7/2d/jdk/diff/3b9a288d7ddb/src/share/classes/java/awt/event/MouseEvent.java
So it is indeed a OpenJDK string, and not an application string.
And clearly, this class should not be using System.out.println, but instead use the logging API.

According to the bug report, it should happen in any applications when using mouse scroll.
I could not reproduce it again right now, not as easily. But I did not try the
mentioned example from the bug. It seems that this has been partially fixed,
but there are still situations where it occurs.
It should be trackable down using the unqiue string easily (and it probably is in MouseEvent.java)

This is a related JDK8 changeset:
http://hg.openjdk.java.net/jdk8/awt/jdk/rev/19431d07bc19

But I do not get OpenJDK Mecurial, I'm unable to find out where to see the
current JDK source. Most of the stuff is last modified 4 years ago.
The SCM is completely inaccessible to outsiders, and I was unable to find what
the changelog of MouseEvent.java for OpenJDK7 is.
If above patch applies to the current JDK7, it should be a no-brainer to add.

While for me this bug is a mere annoyance, "System.out.println" inside AWT is
bound to cause some true bugs in other applications.

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-2-686-pae (SMP w/2 CPU cores)
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages openjdk-7-jre depends on:
ii  libasound2               1.0.25-3
ii  libatk-wrapper-java-jni  0.30.4-2
ii  libatk1.0-0              2.4.0-2
ii  libc6                    2.13-33
ii  libcairo2                1.12.2-2
ii  libcups2                 1.5.3-2
ii  libfontconfig1           2.9.0-6
ii  libfreetype6             2.4.9-1
ii  libgdk-pixbuf2.0-0       2.26.1-1
ii  libgif4                  4.1.6-9.1
ii  libgl1-mesa-glx          8.0.3-1
ii  libglib2.0-0             2.33.2-1
ii  libgtk2.0-0              2.24.10-1
ii  libjpeg8                 8d-1
ii  libpango1.0-0            1.30.0-1
ii  libpng12-0               1.2.49-1
ii  libpulse0                2.0-3
ii  libx11-6                 2:1.5.0-1
ii  libxext6                 2:1.3.1-2
ii  libxi6                   2:1.6.1-1
ii  libxinerama1             2:1.1.2-1
ii  libxrandr2               2:1.3.2-2
ii  libxrender1              1:0.9.7-1
ii  libxtst6                 2:1.2.1-1
ii  openjdk-7-jre-headless   7~u3-2.1.1-1
ii  zlib1g                   1:1.2.7.dfsg-13

Versions of packages openjdk-7-jre recommends:
ii  libgconf2-4       3.2.5-1
ii  libgnome2-0       2.32.1-2
ii  libgnomevfs2-0    1:2.24.4-1
ii  ttf-dejavu-extra  2.33-2

Versions of packages openjdk-7-jre suggests:
ii  icedtea-6-plugin [icedtea6-plugin]  1.2-2

-- no debconf information

Message #10 received at 679036@bugs.debian.org (full text, mbox, reply):

From: "Damien Raude-Morvan" <drazzib@drazzib.com>

To: Erich Schubert <erich@debian.org>, 679036@bugs.debian.org

Subject: Re: [Openjdk] Bug#679036: openjdk-7-jre: Prints "MEvent. CASE!" to the console on certain mouse events

Date: Wed, 18 Jul 2012 00:42:18 +0200

Hi,

Le lundi 25 juin 2012 23:34:39, Erich Schubert a écrit :
> Certain actions (I'm no sure which one, I havn't been able to reproduce
> them reliably) will cause this message to be printed.  This does not
> happen with OpenJDK6, and it did not happen in Sun Java6.
> I've seen them occur in multiple applications, for example in current
> MediathekView, from http://zdfmediathk.sourceforge.net/

I've been unable to reproduce this reliably... Did this append often with 
MediathekView ?

> See also:
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7130140
> http://hg.openjdk.java.net/jdk7/2d/jdk/diff/3b9a288d7ddb/src/share/classes/
> java/awt/event/MouseEvent.java So it is indeed a OpenJDK string, and not an
> application string.
> And clearly, this class should not be using System.out.println, but instead
> use the logging API.

I fully agree with you : System.out usage in java.* packages should be reduced 
to a strict minimum.

> According to the bug report, it should happen in any applications when
> using mouse scroll. I could not reproduce it again right now, not as
> easily. But I did not try the mentioned example from the bug. It seems
> that this has been partially fixed, but there are still situations where
> it occurs.
> It should be trackable down using the unqiue string easily (and it probably
> is in MouseEvent.java)
> 
> This is a related JDK8 changeset:
> http://hg.openjdk.java.net/jdk8/awt/jdk/rev/19431d07bc19
> 
> But I do not get OpenJDK Mecurial, I'm unable to find out where to see the
> current JDK source. Most of the stuff is last modified 4 years ago.
> The SCM is completely inaccessible to outsiders, and I was unable to find
> what the changelog of MouseEvent.java for OpenJDK7 is.
> If above patch applies to the current JDK7, it should be a no-brainer to
> add.

Here is link to upstream JDK7 / JDK8 :
http://hg.openjdk.java.net/jdk7u/jdk7u-
dev/jdk/log/tip/src/share/classes/java/awt/event/MouseEvent.java
http://hg.openjdk.java.net/jdk8/jdk8/jdk/log/tip/src/share/classes/java/awt/event/MouseEvent.java

=> It's only fixed in JDK8 and not in recent update of JDK7.

> While for me this bug is a mere annoyance, "System.out.println" inside AWT
> is bound to cause some true bugs in other applications.

I'm not sure this warrant a specific fix : there is lots of other System.out 
usage in JDK and this is just annoyance...

Cheers,
-- 
Damien

Message #17 received at 679036@bugs.debian.org (full text, mbox, reply):

From: Erich Schubert <erich@debian.org>

To: Damien Raude-Morvan <drazzib@drazzib.com>

Cc: 679036@bugs.debian.org

Subject: Re: [Openjdk] Bug#679036: openjdk-7-jre: Prints "MEvent. CASE!" to the console on certain mouse events

Date: Wed, 18 Jul 2012 08:03:34 +0200

Hello Damien,
I have also seen this happen in other applications such as elki.
Indeed I do not know a use case where a Java application has a UI and
stdout is relevant (and might break another application).
However, there clearly are use cases, if you think of classic
"dialog". Someone might be using a custom java-written "dialog"
application.
I would also not report if it weren't a regression from Java 6.
But given that this didn't happen in Java 6, some problem might break
when this event occurs, which is (in contrast to other System.out
uses) apparently on certain mouse events (unfortunately, I also do not
know yet how to reliably trigger this bug, only that it happens every
now and then).

I do not think this warrants a standalone upload (or freeze
exception), but given that it is a straightforward patch from upstream
removing the "System.out", it IMHO should be queued for the next
upload.

Thank you.
Erich

Message #22 received at 679036-close@bugs.debian.org (full text, mbox, reply):

From: Damien Raude-Morvan <drazzib@debian.org>

To: 679036-close@bugs.debian.org

Subject: Bug#679036: fixed in openjdk-7 7~u3-2.1.1-2

Date: Mon, 23 Jul 2012 21:17:20 +0000

Source: openjdk-7
Source-Version: 7~u3-2.1.1-2

We believe that the bug you reported is fixed in the latest version of
openjdk-7, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 679036@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Damien Raude-Morvan <drazzib@debian.org> (supplier of updated openjdk-7 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


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Hash: SHA256

Format: 1.8
Date: Sat, 30 Jun 2012 18:17:51 +0200
Source: openjdk-7
Binary: openjdk-7-jdk openjdk-7-jre-headless openjdk-7-jre openjdk-7-jre-lib openjdk-7-demo openjdk-7-source openjdk-7-doc openjdk-7-dbg icedtea-7-jre-cacao icedtea-7-jre-jamvm openjdk-7-jre-zero
Architecture: source amd64 all
Version: 7~u3-2.1.1-2
Distribution: sid
Urgency: low
Maintainer: OpenJDK Team <openjdk@lists.launchpad.net>
Changed-By: Damien Raude-Morvan <drazzib@debian.org>
Description: 
 icedtea-7-jre-cacao - Alternative JVM for OpenJDK, using Cacao
 icedtea-7-jre-jamvm - Alternative JVM for OpenJDK, using JamVM
 openjdk-7-dbg - Java runtime based on OpenJDK (debugging symbols)
 openjdk-7-demo - Java runtime based on OpenJDK (demos and examples)
 openjdk-7-doc - OpenJDK Development Kit (JDK) documentation
 openjdk-7-jdk - OpenJDK Development Kit (JDK)
 openjdk-7-jre - OpenJDK Java runtime, using ${vm:Name}
 openjdk-7-jre-headless - OpenJDK Java runtime, using ${vm:Name} (headless)
 openjdk-7-jre-lib - OpenJDK Java runtime (architecture independent libraries)
 openjdk-7-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark
 openjdk-7-source - OpenJDK Development Kit (JDK) source files
Closes: 657854 678228 679036 679292 679465 680284
Changes: 
 openjdk-7 (7~u3-2.1.1-2) unstable; urgency=low
 .
   * d/rules: On Debian Wheezy/Sid bump Build-Depends on libnss3-dev
     (>= 2:3.13.4) and Depends on libnss3 (>= 2:3.13.4) (ie. with epoch).
     (Closes: #679465).
   * d/control: Suggests icedtea-7-plugin instead of icedtea6-plugin
     (Closes: #680284).
   * d/patches/7130140-MouseEvent-systemout.diff: Remove "MEvent. CASE!" from
     console output. (Closes: #679036).
   * Disable -O3 compile: cause wrong Math.* computations.
     (Closes: #679292 and Closes: #678228).
   * debian/patches/FreetypeFontScaler_getFontMetricsNative.diff:
     Fix "OpenJDK returns the text height greater than font size".
     (Closes: #657854)
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