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https://issues.apache.org/jira/browse/KARAF-5877?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacob Beyner updated KARAF-5877:
--------------------------------
Description:
{{LogServiceLog4j2XmlImpl}} will throw an {{org.w3c.dom.DOMException:
NOT_FOUND_ERR}} when the corresponding log4j2 configuration file has an element
with children as the last element in 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],
responsible for throwing the error.
This is because the {{loggers}} object is a flat collection of the {{Loggers}}
element's children, and the {{insertAfter}} Node can be one of those nested
children instead of a first level child. When {{loggers.insertBefore(node,
insertAfter.getNextSibling())}} is called, and {{insertAfter}} is not a first
level child of the {{Loggers}} element, the exception is thrown. [This is
becuase the {{Node.insertBefore}} method requires the second argument to be a
direct child of the node calling the
method|https://docs.oracle.com/javase/7/docs/api/org/w3c/dom/Node.html#insertBefore(org.w3c.dom.Node,%20org.w3c.dom.Node)].
was:
{{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|https://docs.oracle.com/javase/7/docs/api/org/w3c/dom/Node.html#insertBefore(org.w3c.dom.Node,%20org.w3c.dom.Node)],
resulting in a {{NOT_FOUND_ERR}} when that condition is not satisfied.
> 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
> Priority: Trivial
> Fix For: 4.2.0
>
>
> {{LogServiceLog4j2XmlImpl}} will throw an {{org.w3c.dom.DOMException:
> NOT_FOUND_ERR}} when the corresponding log4j2 configuration file has an
> element with children as the last element in 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],
> responsible for throwing the error.
> This is because the {{loggers}} object is a flat collection of the
> {{Loggers}} element's children, and the {{insertAfter}} Node can be one of
> those nested children instead of a first level child. When
> {{loggers.insertBefore(node, insertAfter.getNextSibling())}} is called, and
> {{insertAfter}} is not a first level child of the {{Loggers}} element, the
> exception is thrown. [This is becuase the {{Node.insertBefore}} method
> requires the second argument to be a direct child of the node calling the
> method|https://docs.oracle.com/javase/7/docs/api/org/w3c/dom/Node.html#insertBefore(org.w3c.dom.Node,%20org.w3c.dom.Node)].
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