Re: [isabelle] Isabelle2016-RC2 Java exceptions related to search/replace
I guess I will try what you suggest, however as additional data points
I was able to recreate the situation when I reloaded the same files,
both on Isabelle2016-RC2 and -RC1.
The situation seemed to be triggered by "Enter MATCH..." spew spamming
the output window. Apparently there was enough of it so that it filled
the JVM heap and perhaps caused continuous GC (speculation).
Eventually, poly became quiescent and presumably stopped sending output
to JEdit, but as I noted, JEdit did not recover, and after many minutes
I ended up killing it from the shell.
I also noticed upon restarting after killing that the first time JEdit
is restarted, it generates a "Failed to load Plugin" message, and does not
properly initialize. Upon exiting and starting once again, it starts
normally. So there is some state information that is retained somewhere
that prevents normal starting the first time after a crash or kill.
- Gene Stark
On 01/31/2016 03:44 PM, Makarius wrote:
> On Fri, 29 Jan 2016, Eugene W. Stark wrote:
>> Since I started using Isabelle/JEdit (under Ubuntu), I have had issues with the Search/Replace dialog. One that
>> occurs very frequently is the "Window must not be zero" exception. I just downloaded Isabelle2016-RC2 and since it
>> has happened now nearly immediately with that, I am reporting it. The stack trace is shown below. I don't have a
>> deterministic way to repeat it -- it just happens often while doing search and replace, perhaps associated with the
>> "No more matches found, continue from the beginning" dialog.
> Yes, looking at the corresponding Java sources of jEdit, it is indeed the "keepsearching" dialog. But I don't think
> that jEdit is at fault.
>> java.lang.IllegalArgumentException: Window must not be zero
>> at sun.awt.X11.WindowPropertyGetter.<init>(WindowPropertyGetter.java:56)
> Browsing through the world wild web, this exception occurs frequently in trackers of Java/AWT/Swing projects like
> Netbeans, without any solution. They usually say "wontfix" and point fingers back to Oracle.
> It might be indeed one of these standard X11 window manager problems. The Isabelle2016-RC2 Installation page specifies
> this intentionally as follows: "Proper Window manager / Desktop environment that works with Java/AWT/Swing".
> You could try your luck openjdk-7 or openjdk-8 from the Ubuntu repository. The resulting main directory is something
> like /usr/lib/jvm/java-7-openjdk-amd64
> It needs to be put in two places:
> (1) $ISABELLE_HOME_USER/etc/settings:
> (2) $ISABELLE_HOME/Isabelle2016-RC2.run near the end:
> exec "/usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java" \
> For this Isabelle release, there is still a choice between Java 7 and 8 (I think). We need to bundle Java 8 by default,
> since Oracle no longer provides updates to its Java 7 distribution. It is unclear to me, which one is worse or better.
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