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https://issues.apache.org/jira/browse/GERONIMO-6484?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13713707#comment-13713707
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Bert Jacobs commented on GERONIMO-6484:
---------------------------------------
As to the cause; the code contains the following:
{code}
ClassLoader cl = MimetypesFileTypeMap.class.getClassLoader();
{code}
In special cases like the one I use (a jar in an endorsed dir)
{{getClassLoader()}} returns {{null}} because the class was loaded by the JVM
classloader.
To fix this problem, check if the classloader is null. If so, use
{{Classloader.getSystemClassloader()}} instead.
> Activation 1.1 spec: NullPointerException in MimetypesFileTypeMap
> -----------------------------------------------------------------
>
> Key: GERONIMO-6484
> URL: https://issues.apache.org/jira/browse/GERONIMO-6484
> Project: Geronimo
> Issue Type: Bug
> Security Level: public(Regular issues)
> Components: specs
> Reporter: Bert Jacobs
>
> I'm using Karaf 2.3.2.
> The endorsed directory contains the ServiceMix
> org.apache.servicemix.specs.jaxb-api-2.2-2.2.0 bundle which in turn includes
> a shaded version of geronimo-activation_1.1_spec version 1.0.2.
> My code uses a FileDataSource, requests the content type and receives this:
> {noformat}
> Caused by: java.lang.NullPointerException
> at
> javax.activation.MimetypesFileTypeMap.<init>(MimetypesFileTypeMap.java:62)[:2.2.0]
> at
> javax.activation.FileTypeMap.getDefaultFileTypeMap(FileTypeMap.java:53)[:2.2.0]
> at
> javax.activation.FileDataSource.getContentType(FileDataSource.java:69)[:2.2.0]
> {noformat}
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