Jesse Rao created HTTPCLIENT-1919:
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Summary: Equinox SAXException when starting OSGi module
httpclient-osgi-4.5.5.jar
Key: HTTPCLIENT-1919
URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1919
Project: HttpComponents HttpClient
Issue Type: Bug
Components: HttpClient (classic)
Affects Versions: 4.5.5
Environment: Liferay 7.1 alpha
Reporter: Jesse Rao
This error occurs when starting Liferay 7.1 alpha when the OSGi module
httpclient-osgi-4.5.5.jar is used:
{{2018-04-26 14:40:20.891 ERROR [main][org_eclipse_equinox_metatype:97] Unable
to parse metadata XML at
"bundleentry://45.fwk1343457451/OSGI-INF/metatype/metatype.properties" for
bundle ID "45" with symbolic name "org.apache.httpcomponents.httpclient". }}
{{org.xml.sax.SAXException: Fatal Error: URI=null Line=1: Content is not
allowed in prolog.}}
{{ at
org.eclipse.equinox.metatype.impl.DataParser$MyErrorHandler.fatalError(DataParser.java:856)}}
The issue is that the metatype.properties file is being parsed as XML (but is
not XML). I believe the problem is that the metatype.properties file in
httpclient-osgi-4.5.5.jar is in the wrong location.
According to the OSGi spec, only metatype XML files should be in the
OSGI-INF/metatype folder. See
[https://osgi.org/specification/osgi.cmpn/7.0.0/service.metatype.html#d0e16879|https://osgi.org/specification/osgi.cmpn/7.0.0/service.metatype.html#d0e16879]
However, in httpclient-osgi-4.5.5.jar, there are two files in this folder:
metatype.xml and metatype.properties.
The spec indicates that metatype localization files should go in the
OSGI-INF/l10n folder. See
[https://osgi.org/specification/osgi.core/7.0.0/framework.module.html#i3189742]
Moving the metatype.properties from OSGI-INF/metatype to OSGI-INF/l10n should
solve the problem.
Related issue: HTTPCLIENT-1862
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