Jacob Beyner created KARAF-5877:
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Summary: log4j2 appending error when using log4j2 XML configuration
Key: KARAF-5877
URL: https://issues.apache.org/jira/browse/KARAF-5877
Project: Karaf
Issue Type: Bug
Components: karaf-logging
Affects Versions: 4.2.0
Reporter: Jacob Beyner
Fix For: 4.2.0
{{LogServiceLog4j2XmlImpl}} will throw an {{org.w3c.dom.DOMException:
NOT_FOUND_ERR}} when trying to append to a nested element within the
{{<Loggers>}} element. This causes the {{log:tail}} command to display the logs
and error out immediately.
The reason for this is the {{LogServiceLog4j2XmlImpl.insertIndented}} method.
It will eventually execute [this
line|https://github.com/apache/karaf/blob/master/log/src/main/java/org/apache/karaf/log/core/internal/LogServiceLog4j2XmlImpl.java#L159].
This can throw an error when the last child element within the {{Loggers}}
element has children of its own.
This is because the {{loggers}} object is a flat collection of all of the
{{Loggers}} element's children. When {{loggers.insertBefore(node,
insertAfter.getNextSibling())}} is called, the {{insertAfter}} Node is not be a
first level child of the {{Loggers}} element. The {{Node.insertBefore}} method
requires the second argument to be a direct child of the node calling the
method, resulting in a {{NOT_FOUND_ERR}}.
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