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 <div class="sect1">
 <h2 id="release-notes-2-18-0">2.18.0</h2>
 <div class="sectionbody">
 <div class="dlist">
 <dl>
 <dt class="hdlist1">Release date</dt>
 <dd>
 <p>2022-06-28</p>
 </dd>
 </dl>
 </div>
 <div class="paragraph">
 <p>This release primarily contains bug fixes and minor enhancements.</p>
 </div>
 <div class="paragraph">
 <p>Due to a break in compatibility in the SLF4J binding, Log4j now ships with two versions of the SLF4J to Log4j adapters.
 <code>log4j-slf4j-impl</code> should be used with SLF4J 1.7.x and earlier and <code>log4j-slf4j18-impl</code> should be used with SLF4J 1.8.x and later.
 SLF4J-2.0.0 alpha releases are not fully supported.
 See <a href="https://issues.apache.org/jira/browse/LOG4J2-2975">LOG4J2-2975</a> and <a href="https://jira.qos.ch/browse/SLF4J-511">SLF4J-511</a>.</p>
 </div>
 <div class="paragraph">
 <p>The Log4j 2.18.0 API, as well as many core components, maintains binary compatibility with previous releases.</p>
 </div>
 <div class="paragraph">
 <p>Apache Log4j 2.18.0 requires a minimum of Java 8 to build and run.
 Log4j 2.12.4 is the last release to support Java 7.
 Log4j 2.3.2 is the last release to support Java 6.
 Java 6 and Java 7 are no longer supported by the Log4j team.</p>
 </div>
 <div class="paragraph">
 <p>For complete information on Apache Log4j 2, including instructions on how to submit bug reports, patches, or suggestions for improvement, see <a href="http://logging.apache.org/log4j/2.x/">the Apache Log4j 2 website</a>.</p>
 </div>
 <div class="sect2">
 <h3 id="release-notes-2-18-0-added">Added</h3>
 <div class="ulist">
 <ul>
 <li>
 <p>Add support for Jakarta Mail API in the SMTP appender. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3362">LOG4J2-3362</a>)</p>
 </li>
 <li>
 <p>Add support for custom Log4j 1.x levels. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3419">LOG4J2-3419</a>)</p>
 </li>
 <li>
 <p>Add support for adding and retrieving appenders in Log4j 1.x bridge. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3440">LOG4J2-3440</a>)</p>
 </li>
 <li>
 <p>Add support for custom LMAX disruptor WaitStrategy configuration. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3472">LOG4J2-3472</a>)</p>
 </li>
 <li>
 <p>Add support for Apache Extras' RollingFileAppender in Log4j 1.x bridge. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3483">LOG4J2-3483</a>)</p>
 </li>
 <li>
 <p>Add MutableThreadContextMapFilter. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3495">LOG4J2-3495</a>)</p>
 </li>
 <li>
 <p>Add support for 24 colors in highlighting (<a href="https://issues.apache.org/jira/browse/LOG4J2-3538">LOG4J2-3538</a>)</p>
 </li>
 </ul>
 </div>
 </div>
 <div class="sect2">
 <h3 id="release-notes-2-18-0-changed">Changed</h3>
 <div class="ulist">
 <ul>
 <li>
 <p>Improves ServiceLoader support on servlet containers. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3427">LOG4J2-3427</a>)</p>
 </li>
 <li>
 <p>Make the default disruptor WaitStrategy used by Async Loggers garbage-free. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3473">LOG4J2-3473</a>)</p>
 </li>
 <li>
 <p>Do not throw UnsupportedOperationException when JUL ApiLogger::setLevel is called. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3476">LOG4J2-3476</a>)</p>
 </li>
 <li>
 <p>Support Spring 2.6.x. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3506">LOG4J2-3506</a>)</p>
 </li>
 <li>
 <p>Move perf tests to log4j-core-its (<a href="https://issues.apache.org/jira/browse/LOG4J2-3516">LOG4J2-3516</a>)</p>
 </li>
 <li>
 <p>Upgrade the Flume Appender to Flume 1.10.0 (<a href="https://issues.apache.org/jira/browse/LOG4J2-3536">LOG4J2-3536</a>)</p>
 </li>
 </ul>
 </div>
 </div>
 <div class="sect2">
 <h3 id="release-notes-2-18-0-fixed">Fixed</h3>
 <div class="ulist">
 <ul>
 <li>
 <p>Fix minor typo #792.</p>
 </li>
 <li>
 <p>Improve validation and reporting of configuration errors.</p>
 </li>
 <li>
 <p>Allow enterprise id to be an OID fragment. (<a href="https://issues.apache.org/jira/browse/LOG4J2-1376">LOG4J2-1376</a>)</p>
 </li>
 <li>
 <p>Fix problem with non-uppercase custom levels. (<a href="https://issues.apache.org/jira/browse/LOG4J2-2872">LOG4J2-2872</a>)</p>
 </li>
 <li>
 <p>Avoid ClassCastException in JeroMqManager with custom LoggerContextFactory #791. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3040">LOG4J2-3040</a>)</p>
 </li>
 <li>
 <p>DirectWriteRolloverStrategy should use the current time when creating files. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3339">LOG4J2-3339</a>)</p>
 </li>
 <li>
 <p>Fixes the syslog appender in Log4j 1.x bridge, when used with a custom layout. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3359">LOG4J2-3359</a>)</p>
 </li>
 <li>
 <p>log4j-1.2-api 2.17.2 throws NullPointerException while removing appender with name as null. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3359">LOG4J2-3359</a>)</p>
 </li>
 <li>
 <p>Improve JsonTemplateLayout performance. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3393">LOG4J2-3393</a>)</p>
 </li>
 <li>
 <p>Fix resolution of non-Log4j properties. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3413">LOG4J2-3413</a>)</p>
 </li>
 <li>
 <p>Fixes Spring Boot logging system registration in a multi-application environment. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3418">LOG4J2-3418</a>)</p>
 </li>
 <li>
 <p>JAR file containing Log4j configuration isn&#8217;t closed. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3423">LOG4J2-3423</a>)</p>
 </li>
 <li>
 <p>Properties defined in configuration using a value attribute (as opposed to element) are read correctly. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3424">LOG4J2-3424</a>)</p>
 </li>
 <li>
 <p>Syslog appender lacks the SocketOptions setting. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3425">LOG4J2-3425</a>)</p>
 </li>
 <li>
 <p>Log4j 1.2 bridge should not wrap components unnecessarily. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3426">LOG4J2-3426</a>)</p>
 </li>
 <li>
 <p>Update 3rd party dependencies for 2.18.0. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3428">LOG4J2-3428</a>)</p>
 </li>
 <li>
 <p>SizeBasedTriggeringPolicy would fail to rename files properly when integer pattern contained a leading zero. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3432">LOG4J2-3432</a>)</p>
 </li>
 <li>
 <p>Fixes default SslConfiguration, when a custom keystore is used. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3439">LOG4J2-3439</a>)</p>
 </li>
 <li>
 <p>Fixes appender concurrency problems in Log4j 1.x bridge. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3447">LOG4J2-3447</a>)</p>
 </li>
 <li>
 <p>Fix and test for race condition in FileUtils.mkdir(). (<a href="https://issues.apache.org/jira/browse/LOG4J2-3452">LOG4J2-3452</a>)</p>
 </li>
 <li>
 <p>LocalizedMessage logs misleading errors on the console. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3458">LOG4J2-3458</a>)</p>
 </li>
 <li>
 <p>Add missing message parameterization in RegexFilter. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3475">LOG4J2-3475</a>)</p>
 </li>
 <li>
 <p>Add the missing context stack to JsonLayout template. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3477">LOG4J2-3477</a>)</p>
 </li>
 <li>
 <p>HttpWatcher did not pass credentials when polling. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3481">LOG4J2-3481</a>)</p>
 </li>
 <li>
 <p>UrlConnectionFactory.createConnection now accepts an AuthorizationProvider as a parameter. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3482">LOG4J2-3482</a>)</p>
 </li>
 <li>
 <p>The DirectWriteRolloverStrategy was not detecting the correct index to use during startup. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3490">LOG4J2-3490</a>)</p>
 </li>
 <li>
 <p>Async Loggers were including the location information by default. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3491">LOG4J2-3491</a>)</p>
 </li>
 <li>
 <p>ClassArbiter&#8217;s newBuilder method referenced the wrong class. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3493">LOG4J2-3493</a>)</p>
 </li>
 <li>
 <p>Don&#8217;t use Paths.get() to avoid circular file systems. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3527">LOG4J2-3527</a>)</p>
 </li>
 <li>
 <p>Fix parsing error, when XInclude is disabled. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3531">LOG4J2-3531</a>)</p>
 </li>
 <li>
 <p>Fix LevelRangeFilterBuilder to align with log4j1&#8217;s behavior. (<a href="https://issues.apache.org/jira/browse/LOG4J2-3534">LOG4J2-3534</a>)</p>
 </li>
 <li>
 <p>Fixes problem with wrong ANSI escape code for bright colors (<a href="https://issues.apache.org/jira/browse/LOG4J2-3537">LOG4J2-3537</a>)</p>
 </li>
 <li>
 <p>Log4j 1.2 bridge should generate Log4j 2.x messages based on the parameter runtime type.</p>
 </li>
 </ul>
 </div>
 </div>
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