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Summary
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Generated at: 2017-09-17T23:22:49-07:00

Notes: 2
Binaries: 152
Archives: 1
Standards: 85

Apache Licensed: 84
Generated Documents: 0

JavaDocs are generated, thus a license header is optional.
Generated files do not require license headers.

1 Unknown Licenses

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Files with unapproved licenses:

  RELEASE-NOTES.md

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Archives:

 + .mvn/wrapper/maven-wrapper.jar
 
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  Files with Apache License headers will be marked AL
  Binary files (which do not require any license headers) will be marked B
  Compressed archives will be marked A
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 Printing headers for text files without a valid license header...
 
=====================================================
== File: RELEASE-NOTES.md
=====================================================
# Apache Log4j 2.9.1 Release Notes

The Apache Log4j 2 team is pleased to announce the Log4j 2.9.1 release!

Apache Log4j is a well known framework for logging application behavior. Log4j 2 is an upgrade
to Log4j that provides significant improvements over its predecessor, Log4j 1.x, and provides
many other modern features such as support for Markers, lambda expressions for lazy logging,
property substitution using Lookups, multiple patterns on a PatternLayout and asynchronous
Loggers. Another notable Log4j 2 feature is the ability to be "garbage-free" (avoid allocating
temporary objects) while logging. In addition, Log4j 2 will not lose events while reconfiguring.

This release contains bugfixes and minor enhancements.

As of Log4j 2.9.0, the Log4j API was modified to use java.util.ServiceLoader to locate Log4j implementations,
although the former binding mechanism is still supported. The Log4j jar is now a multi-release jar
to provide implementations of Java 9 specific classes. Multi-release jars are not supported by
the OSGi specification so OSGi modules will not be able to take advantage of these implementations
but will not lose functionality as they will fall back to the implementations used in Java 7 and 8.
More details on the new features and fixes are itemized below. Note that some tools are not compatible
with multi-release jars and may fail trying to process class files in the META-INF/versions/9 folder.
Those errors should be reported to the tool vendor.

Note that subsequent to the 2.9.0 release, for security reasons, SerializedLayout is deprecated and no
longer used as default in the Socket and JMS appenders. SerializedLayout can still be used as before,
but has to be specified explicitly. To retain old behaviour, you have to change configuration like:

    <Appenders>
      <Socket name="socket" host="localhost" port="9500"/>
    </Appenders>

into:

    <Appenders>
      <Socket name="socket" host="localhost" port="9500">
        <SerializedLayout/>
      </Socket>
    </Appenders>

We do, however, discourage the use of SerializedLayout and recommend JsonLayout as a replacement:

    <Appenders>
      <Socket name="socket" host="localhost" port="9500">
        <JsonLayout properties="true"/>
      </Socket>
    </Appenders>

Note that subsequent to the 2.9.0 release, for security reasons, Log4j does not process DTD in XML files.
If you used DTD for including snippets, you have to use XInclude or Composite Configuration instead.

The Log4j 2.9.1 API, as well as many core components, maintains binary compatibility with previous releases.