log4j-api/src/main/java/org/apache/logging/log4j/util/StackLocator.java (5 lines):
	- line 51: /** TODO Consider removing now that we require Java 8. */
	- line 58: /** TODO: Use Object.class. */
	- line 102: // TODO: return Object.class instead of null (though it will have a null ClassLoader)
	- line 155: // TODO: return Object.class
	- line 174: // TODO: return Object.class


src/site/xdoc/manual/appenders.xml (5 lines):
	- line 222: <!-- TODO: this needs performance charts and links added -->
	- line 230: <!-- TODO: this need performance charts and links added -->
	- line 240: <!-- TODO: this needs performance charts and links added -->
	- line 2134: (TODO: performance tests that compare performance of this appender to
	- line 2142: (TODO: performance test remapping various sizes.)


log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/HtmlTextRenderer.java (4 lines):
	- line 20: * TODO Renders an input as HTML output.
	- line 25: // TODO Auto-generated constructor stub
	- line 30: // TODO Auto-generated method stub
	- line 35: // TODO Auto-generated method stub


log4j-core/src/main/java/org/apache/logging/log4j/core/Logger.java (3 lines):
	- line 50: * TODO All the isEnabled methods could be pushed into a filter interface. Not sure of the utility of having isEnabled
	- line 63: // FIXME: ditto to the above
	- line 300: // FIXME: this really ought to be an Iterable instead of an Iterator


log4j-core/src/main/java/org/apache/logging/log4j/core/osgi/Activator.java (3 lines):
	- line 77: // TODO: bundle state can change during this
	- line 107: // TODO: plugin lifecycle code
	- line 122: // FIXME: STARTING instead of STARTED?


log4j-core/src/main/java/org/apache/logging/log4j/core/tools/picocli/CommandLine.java (3 lines):
	- line 2958: // TODO remember longest concatenated option string length (issue #45)
	- line 4098: return str.length; // TODO count some characters as double length
	- line 4108: done += copy(word, columnValue, offset + done); // TODO localized length


src/site/xdoc/manual/extending.xml (3 lines):
	- line 25: <!-- TODO: add in documentation regarding typed attributes -->
	- line 530: <!-- TODO: this will change with LOG4J2-1188 -->
	- line 575: <!-- TODO: some documentation here! -->


src/site/xdoc/manual/garbagefree.xml (2 lines):
	- line 607: TODO Applications that wish to reuse custom Message instances with Async Loggers should let
	- line 609: TODO This is not sufficient: see LOG4J2-1342, would be nice if we could solve this in a generic way.


log4j-api/src/main/java/org/apache/logging/log4j/LogManager.java (2 lines):
	- line 174: // TODO: would it be a terrible idea to try and find the caller ClassLoader here?
	- line 453: // FIXME: should we allow only one update of the factory?


log4j-api/src/main/java/org/apache/logging/log4j/MarkerManager.java (2 lines):
	- line 145: // TODO: use java.util.concurrent
	- line 368: // FIXME: might want to use an initial capacity; the default is 16 (or str.length() + 16)


log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/JAnsiTextRenderer.java (2 lines):
	- line 95: // TODO Should the keys be in an enum?
	- line 134: // TODO Should the keys be in an enum?


log4j-core/src/main/java/org/apache/logging/log4j/core/layout/AbstractJacksonLayout.java (2 lines):
	- line 301: // TODO Jackson-based layouts have certain filters set up for Log4jLogEvent.
	- line 302: // TODO Need to set up the same filters for MutableLogEvent but don't know how...


log4j-core/src/main/java/org/apache/logging/log4j/core/impl/ThrowableProxy.java (2 lines):
	- line 45: * TODO: Move this class to org.apache.logging.log4j.core because it is used from LogEvent.
	- line 48: * TODO: Deserialize: Try to rebuild Throwable if the target exception is in this class loader?


log4j-jul/src/main/java/org/apache/logging/log4j/jul/DefaultLevelConverter.java (2 lines):
	- line 86: * TODO consider making public for advanced configuration.
	- line 93: * TODO consider making public for advanced configuration.


log4j-core/src/main/java/org/apache/logging/log4j/core/util/CronExpression.java (2 lines):
	- line 334: //FUTURE_TODO: (QUARTZ-481) IMPROVE THIS! The following is a BAD solution to this problem. Performance will be very bad here, depending on the cron expression. It is, however A solution.
	- line 1663: // FUTURE_TODO: implement QUARTZ-423


log4j-1.2-api/src/main/java/org/apache/log4j/xml/DOMConfigurator.java (1 line):
	- line 92: // TODO Watch


src/site/xdoc/manual/customconfig.xml (1 line):
	- line 308: <!-- TODO: update code example below with new plugin API -->


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/routing/Routes.java (1 line):
	- line 162: // TODO Why not make this a Map or add a Map.


log4j-core/src/main/java/org/apache/logging/log4j/core/util/Transform.java (1 line):
	- line 131: // TODO: escaped Unicode chars.


log4j-core/src/main/java/org/apache/logging/log4j/core/LogEventListener.java (1 line):
	- line 25: * TODO (MS) How is this class any different from Appender?


log4j-core/src/main/java/org/apache/logging/log4j/core/config/ConfigurationSource.java (1 line):
	- line 224: * @deprecated Not used internally, no replacement. TODO remove and make source final.


log4j-api/src/main/java/org/apache/logging/log4j/util/LoaderUtil.java (1 line):
	- line 166: // FIXME: looking at the code for Class.newInstance(), this seems to do the same thing as above


log4j-core/src/main/java/org/apache/logging/log4j/core/util/datetime/FormatCache.java (1 line):
	- line 36: // TODO: Before making public move from getDateTimeInstance(Integer,...) to int; or some other approach.


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ThresholdFilter.java (1 line):
	- line 162: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/db/jdbc/JdbcDatabaseManager.java (1 line):
	- line 260: // TODO How about also using the className?


log4j-core/src/main/java/org/apache/logging/log4j/core/config/plugins/PluginAttribute.java (1 line):
	- line 91: // TODO: could we allow a blank value and infer the attribute name through reflection?


log4j-1.2-api/src/main/java/org/apache/log4j/helpers/AppenderAttachableImpl.java (1 line):
	- line 37: /** Array of appenders. TODO */


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/TriggeringPolicy.java (1 line):
	- line 28: public interface TriggeringPolicy /* TODO 3.0: extends LifeCycle */ {


log4j-api/src/main/java/org/apache/logging/log4j/message/LocalizedMessageFactory.java (1 line):
	- line 34: // FIXME: cannot use ResourceBundle name for serialization until Java 8


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/TimeFilter.java (1 line):
	- line 248: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/config/Configurator.java (1 line):
	- line 410: // TODO Should additivity be inherited?


log4j-1.2-api/src/main/java/org/apache/log4j/layout/Log4j1SyslogLayout.java (1 line):
	- line 198: // TODO: splitting message into 1024 byte chunks?


log4j-core/src/main/java/org/apache/logging/log4j/core/config/plugins/convert/TypeConverters.java (1 line):
	- line 101: * <li>String using {@link Charset#defaultCharset()} [TODO Should this be UTF-8 instead?]</li>


log4j-api/src/main/java/org/apache/logging/log4j/message/Message.java (1 line):
	- line 77: * TODO Do all messages have a format?  What syntax?  Using a Formatter object could be cleaner.


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/MarkerFilter.java (1 line):
	- line 155: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/RegexReplacement.java (1 line):
	- line 82: // FIXME: should we use Matcher.quoteReplacement() here?


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/action/DeleteAction.java (1 line):
	- line 142: // TODO return (visitor.success || ignoreProcessingFailure)


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/StructuredDataFilter.java (1 line):
	- line 157: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/MapFilter.java (1 line):
	- line 231: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-iostreams/src/main/java/org/apache/logging/log4j/io/package-info.java (1 line):
	- line 19: * TODO: introduction to IoBuilder


log4j-api/src/main/java/org/apache/logging/log4j/util/StackLocatorUtil.java (1 line):
	- line 39: // TODO: return Object.class instead of null (though it will have a null ClassLoader)


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/RollingFileManager.java (1 line):
	- line 468: // TODO We could parameterize this class with a TriggeringPolicy instead of type casting here.


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/RegexFilter.java (1 line):
	- line 125: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/db/AbstractDatabaseManager.java (1 line):
	- line 148: // TODO should super track Configuration instead of LoggerContext?


log4j-core/src/main/java/org/apache/logging/log4j/core/layout/HtmlLayout.java (1 line):
	- line 456: // TODO: extract charset from content-type


log4j-api/src/main/java/org/apache/logging/log4j/spi/AbstractLogger.java (1 line):
	- line 2180: // TODO Configuration setting to propagate exceptions back to the caller *if requested*


log4j-iostreams/src/main/java/org/apache/logging/log4j/io/IoBuilder.java (1 line):
	- line 268: // TODO: could this builder use generics to infer the desired IO class?


log4j-mongodb4/src/main/java/org/apache/logging/log4j/mongodb4/MongoDb4Provider.java (1 line):
	- line 86: // TODO Where does this number come from?


log4j-core/src/main/java/org/apache/logging/log4j/core/config/plugins/processor/PluginProcessor.java (1 line):
	- line 54: // TODO: this could be made more abstract to allow for compile-time and run-time plugin processing


log4j-core/src/main/java/org/apache/logging/log4j/core/config/json/JsonConfiguration.java (1 line):
	- line 76: // TODO: this duplicates a lot of the XmlConfiguration constructor


log4j-to-slf4j/src/main/java/org/apache/logging/slf4j/SLF4JLogger.java (1 line):
	- line 314: // TODO: wrap SLF4J 2.x LoggingEventBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/util/Loader.java (1 line):
	- line 59: // TODO: this method could use some explanation


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/action/AbstractPathAction.java (1 line):
	- line 80: // TODO return (visitor.success || ignoreProcessingFailure)


log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/AbstractStyleNameConverter.java (1 line):
	- line 33: public abstract class AbstractStyleNameConverter extends LogEventPatternConverter /*TODO: implements AnsiConverter*/ {


log4j-core/src/main/java/org/apache/logging/log4j/core/config/Order.java (1 line):
	- line 29: // TODO: 2.2+ use this annotation for all @Plugin classes


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ThreadContextMapFilter.java (1 line):
	- line 203: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/ErrorHandler.java (1 line):
	- line 21: * TODO if the appender interface is simplified, then error handling could just be done by wrapping


src/site/xdoc/manual/plugins.xml (1 line):
	- line 71: TODO: in future, plugins will be able to be annotated with @Order which can override priorities


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/ConsoleAppender.java (1 line):
	- line 51: * TODO Accessing <code>System.out</code> or <code>System.err</code> as a byte stream instead of a writer bypasses the


log4j-jdbc-dbcp2/src/main/java/org/apache/logging/log4j/core/appender/db/jdbc/PoolingDriverConnectionSource.java (1 line):
	- line 128: // TODO Auto-generated method stub


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/DynamicThresholdFilter.java (1 line):
	- line 61: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-core/src/main/java/org/apache/logging/log4j/core/LogEvent.java (1 line):
	- line 158: * TODO guess this could go into a thread context object too. (RG) Why?


log4j-core/src/main/java/org/apache/logging/log4j/core/appender/db/jdbc/JdbcAppender.java (1 line):
	- line 82: // TODO Consider moving up to AbstractDatabaseAppender.Builder.


log4j-core/src/main/java/org/apache/logging/log4j/core/util/datetime/FixedDateFormat.java (1 line):
	- line 111: // TODO Do we even want a format without seconds?


log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ScriptFilter.java (1 line):
	- line 130: // TODO Consider refactoring to use AbstractFilter.AbstractFilterBuilder


log4j-1.2-api/src/main/java/org/apache/log4j/Category.java (1 line):
	- line 423: // TODO Should this be an IllegalStateException?