PS .. are you running a pure openjdk build or are you running a build which
includes the proprietary Lucida fonts.
Do you have a fontconfig.properties which is customised for AIX ?
If you eliminate both of those, as would be the typical Linux OpenJDK case,
I think it quite likely that without libfontconfig you'll see JDK fall
flat on
its face due to not being able to locate any fonts at all.
-phil.
On 7/18/2011 5:06 PM, Phil Race wrote:
On 7/18/11 4:13 PM, Steve Poole wrote:
On 18/07/11 23:14, Phil Race wrote:
Ah you said it was AIX, not Linux. Still, it should have that
library installed
even if the de-ref is fixed.
Not on AIX - its completely optional - and as far we can tell (other
than this particular problem) nothing else bad happens.
If that's optional I assume a lot more is optional that needs to be
installed
for a GUI app. But JDK on all unix flavours is very reliant on
fontconfig to find
font files. I suggest to make fontconfig a pre-requisite for Java on
AIX. Even server
apps use fonts more often than you'd expect.
I didn't mean to just "cc" 2d, but to disconnect the discussion from
core-libs
since its not related to core-libs in way at all.
Yes, its 2d because its font, I'm actually surprised that is a
surprise ...
-phil.
Having said that I would expect customers to install the package -
this fix is simply a belt and braces change.
I don't know why the attachment is missing - here it is inline:
---
diff --git a/src/solaris/classes/sun/font/FontConfigManager.java
b/src/solaris/classes/sun/font/FontConfigManager.java
--- a/src/solaris/classes/sun/font/FontConfigManager.java
+++ b/src/solaris/classes/sun/font/FontConfigManager.java
@@ -348,6 +348,8 @@
initFontConfigFonts(false);
+ if(fontConfigFonts==null) return null; // init failed
+
FcCompFont fcInfo = null;
for (int i=0; i<fontConfigFonts.length; i++) {
if (name.equals(fontConfigFonts[i].fcFamily) &&
---
By the way - why is this 2d? because it's font? Anyway I've cc'd
2d-dev as you suggest. Thanks for the quick response.
-phil.
On 7/18/2011 3:12 PM, Phil Race wrote:
Steve,
There's no attachment .. and this should be discussed on 2d-dev,
not core-libs.
I do see in the code where the null de-ref can happen. This is some
new JDK 7 code.
Although a system where the library is missing is basically DOA for
client use.
I'd suspect you are running 32 bit JDK on a 64 bit Linux which
hasn't had
the 32 bit libs installed. If so, likely you'll run into other
problems too.
-phil.
On 7/18/2011 2:37 PM, Steve Poole wrote:
Hi all, a problem was discovered on JDK7 when using the Nimbus L&F
on a system where libfontconfig.so was not installed (On AIX
actually but in theory on any unix system)
Under the covers Nimbus uses the sun.font.FontConfigManager to
retrieve fonts. sun.font.FontConfigManager in turn is intended to
use (for a unix system) the libfontconfig.so system library if
present.
The code is intended to cope with the library being missing but it
unfortunately doesn't. A array is referenced without checking if
it is null. On systems where the system library is present this
array is never null but in this specific case the array is null
and the reference fails as follows.
—
Exception in thread "main" java.lang.NullPointerException
at
sun.font.FontConfigManager.getFontConfigFont(FontConfigManager.java:352)
at sun.awt.X11FontManager.getFontConfigFUIR(X11FontManager.java:817)
at sun.font.FontUtilities.getFontConfigFUIR(FontUtilities.java:472)
at
javax.swing.plaf.nimbus.NimbusDefaults.<init>(NimbusDefaults.java:138)
at
javax.swing.plaf.nimbus.NimbusLookAndFeel.<init>(NimbusLookAndFeel.java:100)
at Nimbus.main(Nimbus.java:6)
–
The fix is trivial (see attached) and probably just tactical.
Cheers,
Steve
