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From: Patrick Roemer <sangamon@netcologne.de>
Newsgroups: comp.lang.java.programmer
Subject: Re: Java 9 issues
Date: Tue, 3 Oct 2017 20:20:04 +0200
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Responding to Arne Vajhøj:
>>> http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/25066225d892
>>>
>>> the fix seems to have been to change:
>>>
>>>             rs.onRegistration(registry, category);
>>>
>>> to:
>>>
>>>              try {
>>>                  rs.onRegistration(registry, category);
>>>              } catch (Throwable t) {
>>>                  System.err.println("Caught and handled this exception");
>>>                  t.printStackTrace();
>>>              }
>>>
>>> WTF????
>> 
>> Exactly.  All I saw in Patrick's link was this 'fix' that prints
>> stack traces.  Can I get a jar that gets rid of the error and the
>> messages?
> 
> OpenJDK : edit, compiler, update jar
> 
> Oracle JDK : submit a new bug report (you could get in license problems
>               by modifying rt.jar I believe)

The actual bug is in the jai-imageio version parsing. The "fix" on the
JDK side is just a generic, rather makeshift and somewhat risky measure
of self-defence against buggy plugins.

Best regards,
Patrick