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https://issues.apache.org/jira/browse/PDFBOX-5242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17385641#comment-17385641
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Clifford Dann commented on PDFBOX-5242:
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It's not, they just have not set it set up correctly, this will always cause
a java.util.ServiceConfigurationError error and is related to JEE and will
only happen if you have more than one war file deployed.
To get around this problem in the end, as my comments above are incorrect, as
it depends if tomcat is already running or not, and gave some misleading
results
The actual problem is that {color:#1d1c1d}java.util.ServiceLoader{color} just
dose not work with JEE as where it gets the classes from dose not take into
account that there are multiple class paths and each are associated with a war
file, and what it dose is returns LoggerBridge from the original class loader
and returns JDKLoggerBridge from the current class loader so when ServiceLoader
dose if (service.isAssignableFrom(clazz)) { too check if it is ok, it fails as
they come from separate class loaders.
To get around this problem I had to download the source and change the code and
removed the use of {color:#1d1c1d}java.util.ServiceLoader{color} and got the
class directly. so in my copy LoggerFactory getLogger dose return new
JDKLogger(java.util.logging.Logger.getLogger(cls.getName()));
and once that started to work it fell over on CacheFactory for the same reason
so I made cacheBridge = new SoftReferenceCacheBridge();
I do not know too much about {color:#1d1c1d}java.util.ServiceLoader, but from
google I get the impression it just dose not work with JEE containers.{color}
> LoggerBridge loading under the wrong class loader
> -------------------------------------------------
>
> Key: PDFBOX-5242
> URL: https://issues.apache.org/jira/browse/PDFBOX-5242
> Project: PDFBox
> Issue Type: Bug
> Components: JBIG2
> Affects Versions: 3.0.0 JBIG2, 3.0.1 JBIG2, 3.0.2 JBIG2, 3.0.3 JBIG2
> Environment: Java 16
> Reporter: Clifford Dann
> Priority: Major
>
> When used in a Tomcat servelet LoggerBridge has a different class loader to
> JDKLoggerBridge so when it dose {color:#1d1c1d}if
> (service.isAssignableFrom(clazz)) {{color} in java.util.ServiceLoader it
> fails.
> took the source to 3.0.3 and replaced all.
> private static final Logger log
> with
> private final Logger log
> and also added , Thread.currentThread().getContextClassLoader() as a
> parameter to LoggerFactory.getLogger .
>
> This fixed the problem for me, not too sure if
> Thread.currentThread().getContextClassLoader() is over kill as I think it is
> the static that is causing the problem.
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