You mean let’s replace all occurrences of `log4j.skipJansi` with 
`log4j2.skipJansi`, in both code and documentation?



> On Oct 24, 2017, at 14:03, Matt Sicker <[email protected]> wrote:
> 
> Can you use the new system property naming scheme? This would be
> log4j2.skipJansi. That property would work regardless with the new system
> properties parser thing, though the documentation should be more consistent
> now.
> 
>> On 23 October 2017 at 22:14, <[email protected]> wrote:
>> 
>> Repository: logging-log4j2
>> Updated Branches:
>>  refs/heads/master 00823bd95 -> 73efe3dcf
>> 
>> 
>> LOG4J2-2087 Jansi now needs to be enabled explicitly (by setting system
>> property `log4j.skipJansi` to `false`). To avoid causing problems for web
>> applications, Log4j will no longer automatically try to load Jansi without
>> explicit configuration.
>> 
>> 
>> Project: http://git-wip-us.apache.org/repos/asf/logging-log4j2/repo
>> Commit: http://git-wip-us.apache.org/repos/asf/logging-log4j2/
>> commit/73efe3dc
>> Tree: http://git-wip-us.apache.org/repos/asf/logging-log4j2/tree/73efe3dc
>> Diff: http://git-wip-us.apache.org/repos/asf/logging-log4j2/diff/73efe3dc
>> 
>> Branch: refs/heads/master
>> Commit: 73efe3dcf6787e66177a6485271362c5f989e014
>> Parents: 00823bd
>> Author: rpopma <[email protected]>
>> Authored: Tue Oct 24 12:13:56 2017 +0900
>> Committer: rpopma <[email protected]>
>> Committed: Tue Oct 24 12:13:56 2017 +0900
>> 
>> ----------------------------------------------------------------------
>> .../log4j/core/appender/ConsoleAppender.java    | 10 ++--
>> .../log4j/core/layout/PatternLayout.java        | 16 +++++--
>> .../ConsoleAppenderAnsiMessagesMain.java        |  3 +-
>> .../ConsoleAppenderAnsiStyleJira180Main.java    |  3 +-
>> .../ConsoleAppenderAnsiStyleJira272Main.java    |  1 +
>> .../ConsoleAppenderAnsiStyleJira319Main.java    |  3 +-
>> .../ConsoleAppenderAnsiStyleLayoutMain.java     |  3 +-
>> .../ConsoleAppenderAnsiStyleNameLayoutMain.java |  1 +
>> ...nsoleAppenderHighlightLayoutDefaultMain.java |  1 +
>> .../ConsoleAppenderHighlightLayoutMain.java     |  1 +
>> .../ConsoleAppenderJAnsiMessageMain.java        |  7 +--
>> .../ConsoleAppenderJAnsiXExceptionMain.java     |  7 +--
>> .../ConsoleAppenderNoAnsiStyleLayoutMain.java   |  2 +-
>> .../log4j/core/pattern/StyleConverterTest.java  |  6 +++
>> src/changes/changes.xml                         |  3 ++
>> src/site/xdoc/manual/layouts.xml.vm             | 48 ++++++++++++--------
>> 16 files changed, 76 insertions(+), 39 deletions(-)
>> ----------------------------------------------------------------------
>> 
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/main/java/org/apache/logging/log4j/
>> core/appender/ConsoleAppender.java
>> ----------------------------------------------------------------------
>> diff --git 
>> a/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/ConsoleAppender.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppender.java
>> index bd2dc16..90d16e6 100644
>> --- a/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppender.java
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppender.java
>> @@ -67,7 +67,7 @@ public final class ConsoleAppender extends
>> AbstractOutputStreamAppender<OutputSt
>>      * Enumeration of console destinations.
>>      */
>>     public enum Target {
>> -
>> +
>>         /** Standard output. */
>>         SYSTEM_OUT {
>>             @Override
>> @@ -76,7 +76,7 @@ public final class ConsoleAppender extends
>> AbstractOutputStreamAppender<OutputSt
>>                 return getCharset("sun.stdout.encoding",
>> Charset.defaultCharset());
>>             }
>>         },
>> -
>> +
>>         /** Standard error output. */
>>         SYSTEM_ERR {
>>             @Override
>> @@ -85,9 +85,9 @@ public final class ConsoleAppender extends
>> AbstractOutputStreamAppender<OutputSt
>>                 return getCharset("sun.stderr.encoding",
>> Charset.defaultCharset());
>>             }
>>         };
>> -
>> +
>>         public abstract Charset getDefaultCharset();
>> -
>> +
>>         protected Charset getCharset(final String property, Charset
>> defaultCharset) {
>>             return new PropertiesUtil(PropertiesUtil.
>> getSystemProperties()).getCharsetProperty(property, defaultCharset);
>>         }
>> @@ -260,7 +260,7 @@ public final class ConsoleAppender extends
>> AbstractOutputStreamAppender<OutputSt
>>             throw new IllegalStateException("Unsupported default
>> encoding " + enc, ex);
>>         }
>>         final PropertiesUtil propsUtil = PropertiesUtil.getProperties();
>> -        if (!propsUtil.isOsWindows() || 
>> propsUtil.getBooleanProperty("log4j.skipJansi")
>> || direct) {
>> +        if (!propsUtil.isOsWindows() || 
>> propsUtil.getBooleanProperty("log4j.skipJansi",
>> true) || direct) {
>>             return outputStream;
>>         }
>>         try {
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/main/java/org/apache/logging/log4j/
>> core/layout/PatternLayout.java
>> ----------------------------------------------------------------------
>> diff --git 
>> a/log4j-core/src/main/java/org/apache/logging/log4j/core/layout/PatternLayout.java
>> b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> layout/PatternLayout.java
>> index e4440eb..a6b3a88 100644
>> --- a/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> layout/PatternLayout.java
>> +++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/
>> layout/PatternLayout.java
>> @@ -38,6 +38,7 @@ import org.apache.logging.log4j.core.pattern.
>> LogEventPatternConverter;
>> import org.apache.logging.log4j.core.pattern.PatternFormatter;
>> import org.apache.logging.log4j.core.pattern.PatternParser;
>> import org.apache.logging.log4j.core.pattern.RegexReplacement;
>> +import org.apache.logging.log4j.util.PropertiesUtil;
>> import org.apache.logging.log4j.util.Strings;
>> 
>> /**
>> @@ -143,7 +144,7 @@ public final class PatternLayout extends
>> AbstractStringLayout {
>> 
>>     /**
>>      * Deprecated, use {@link #newSerializerBuilder()} instead.
>> -     *
>> +     *
>>      * @param configuration
>>      * @param replace
>>      * @param pattern
>> @@ -427,7 +428,7 @@ public final class PatternLayout extends
>> AbstractStringLayout {
>>     }
>> 
>>     private static class PatternSelectorSerializer implements Serializer,
>> Serializer2 {
>> -
>> +
>>         private final PatternSelector patternSelector;
>>         private final RegexReplacement replace;
>> 
>> @@ -535,7 +536,7 @@ public final class PatternLayout extends
>> AbstractStringLayout {
>>         private boolean alwaysWriteExceptions = true;
>> 
>>         @PluginBuilderAttribute
>> -        private boolean disableAnsi;
>> +        private boolean disableAnsi = !useAnsiEscapeCodes();
>> 
>>         @PluginBuilderAttribute
>>         private boolean noConsoleNoAnsi;
>> @@ -549,6 +550,12 @@ public final class PatternLayout extends
>> AbstractStringLayout {
>>         private Builder() {
>>         }
>> 
>> +        private boolean useAnsiEscapeCodes() {
>> +            PropertiesUtil propertiesUtil = PropertiesUtil.getProperties()
>> ;
>> +            boolean isPlatformSupportsAnsi =
>> !propertiesUtil.isOsWindows();
>> +            boolean isJansiRequested = !propertiesUtil.
>> getBooleanProperty("log4j.skipJansi", true);
>> +            return isPlatformSupportsAnsi || isJansiRequested;
>> +        }
>> 
>>         /**
>>          * @param pattern
>> @@ -609,7 +616,8 @@ public final class PatternLayout extends
>> AbstractStringLayout {
>> 
>>         /**
>>          * @param disableAnsi
>> -         *        If {@code "true"} (default is false), do not output
>> ANSI escape codes
>> +         *        If {@code "true"} (default is value of system property
>> `log4j.skipJansi`, or `true` if undefined),
>> +         *        do not output ANSI escape codes
>>          */
>>         public Builder withDisableAnsi(final boolean disableAnsi) {
>>             this.disableAnsi = disableAnsi;
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiMessagesMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderAnsiMessagesMain.java b/log4j-core/src/test/java/
>> org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiMessagesMai
>> n.java
>> index f8ea731..f74ab1b 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiMessagesMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiMessagesMain.java
>> @@ -29,7 +29,7 @@ import org.apache.logging.log4j.core.
>> config.Configurator;
>>  * <p>
>>  * Running from a Windows command line from the root of the project:
>>  * </p>
>> - *
>> + *
>>  * <pre>
>>  * java -classpath log4j-core\target\test-classes;log4j-core\target\
>> classes;log4j-api\target\classes;%HOME%\.m2\repository\
>> org\fusesource\jansi\jansi\1.14\jansi-1.14.jar;
>> org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiMessagesMain
>> log4j-core/target/test-classes/log4j2-console.xml
>>  * </pre>
>> @@ -39,6 +39,7 @@ public class ConsoleAppenderAnsiMessagesMain {
>>     private static final Logger LOG = LogManager.getLogger(
>> ConsoleAppenderAnsiMessagesMain.class);
>> 
>>     public static void main(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         try (final LoggerContext ctx = Configurator.initialize(
>> ConsoleAppenderAnsiMessagesMain.class.getName(),
>>                 "target/test-classes/log4j2-console.xml")) {
>>             LOG.fatal("\u001b[1;35mFatal message.\u001b[0m");
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira180Main.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderAnsiStyleJira180Main.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira180Main.java
>> index 5a7fcee..5bb815d 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira180Main.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira180Main.java
>> @@ -27,7 +27,7 @@ import org.apache.logging.log4j.core.
>> config.Configurator;
>>  * <p>
>>  * Running from a Windows command line from the root of the project:
>>  * </p>
>> - *
>> + *
>>  * <pre>
>>  * java -classpath log4j-core\target\test-classes;log4j-core\target\
>> classes;log4j-api\target\classes;%HOME%\.m2\repository\
>> org\fusesource\jansi\jansi\1.14\jansi-1.14.jar;
>> org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira180Main
>> log4j-core/target/test-classes/log4j2-180.xml
>>  * </pre>
>> @@ -37,6 +37,7 @@ public class ConsoleAppenderAnsiStyleJira180Main {
>>     private static final Logger LOG = LogManager.getLogger(
>> ConsoleAppenderAnsiStyleJira180Main.class);
>> 
>>     public static void main(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         // System.out.println(System.getProperty("java.class.path"));
>>         final String config = args.length == 0 ?
>> "target/test-classes/log4j2-180.xml" : args[0];
>>         try (final LoggerContext ctx = Configurator.initialize(
>> ConsoleAppenderAnsiMessagesMain.class.getName(),
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira272Main.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderAnsiStyleJira272Main.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira272Main.java
>> index 9889f46..8c8aaa9 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira272Main.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira272Main.java
>> @@ -36,6 +36,7 @@ public class ConsoleAppenderAnsiStyleJira272Main {
>>     private static final Logger LOG = LogManager.getLogger(
>> ConsoleAppenderAnsiStyleJira272Main.class);
>> 
>>     public static void main(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         // System.out.println(System.getProperty("java.class.path"));
>>         final String config = args.length == 0 ?
>> "target/test-classes/log4j2-272.xml" : args[0];
>>         try (final LoggerContext ctx = Configurator.initialize(
>> ConsoleAppenderAnsiMessagesMain.class.getName(), config)) {
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira319Main.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderAnsiStyleJira319Main.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira319Main.java
>> index 54ad06c..9d62101 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira319Main.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleJira319Main.java
>> @@ -27,7 +27,7 @@ import org.apache.logging.log4j.core.
>> config.Configurator;
>>  * <p>
>>  * Running from a Windows command line from the root of the project:
>>  * </p>
>> - *
>> + *
>>  * <pre>
>>  * java -classpath log4j-core\target\test-classes;log4j-core\target\
>> classes;log4j-api\target\classes;%HOME%\.m2\repository\
>> org\fusesource\jansi\jansi\1.14\jansi-1.14.jar;
>> org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira319Main
>> log4j-core/target/test-classes/log4j2-319.xml
>>  * </pre>
>> @@ -37,6 +37,7 @@ public class ConsoleAppenderAnsiStyleJira319Main {
>>     private static final Logger LOG = LogManager.getLogger(
>> ConsoleAppenderAnsiStyleJira319Main.class);
>> 
>>     public static void main(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         // System.out.println(System.getProperty("java.class.path"));
>>         final String config = args.length == 0 ?
>> "target/test-classes/log4j2-319.xml" : args[0];
>>         try (final LoggerContext ctx = Configurator.initialize(
>> ConsoleAppenderAnsiMessagesMain.class.getName(),
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleLayoutMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderAnsiStyleLayoutMain.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleLayoutMain.java
>> index 5e3bb0f..758b13e 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleLayoutMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleLayoutMain.java
>> @@ -38,7 +38,7 @@ import org.junit.Test;
>>  * <pre>
>>  * java -classpath log4j-core\target\test-classes;log4j-core\target\
>> classes;log4j-api\target\classes;%HOME%\.m2\repository\
>> org\fusesource\jansi\jansi\1.14\jansi-1.14.jar;
>> org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleLayoutMain
>> log4j-core/target/test-classes/log4j2-console-style-ansi.xml
>>  * </pre>
>> - *
>> + *
>>  */
>> public class ConsoleAppenderAnsiStyleLayoutMain {
>> 
>> @@ -55,6 +55,7 @@ public class ConsoleAppenderAnsiStyleLayoutMain {
>>     }
>> 
>>     public void test(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         // System.out.println(System.getProperty("java.class.path"));
>>         final String config = args == null || args.length == 0 ?
>> "target/test-classes/log4j2-console-style-ansi.xml"
>>                 : args[0];
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleNameLayoutMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderAnsiStyleNameLayoutMain.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleNameLayoutMain.java
>> index 4a2b26a..09f111b 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleNameLayoutMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderAnsiStyleNameLayoutMain.java
>> @@ -32,6 +32,7 @@ public class ConsoleAppenderAnsiStyleNameLayoutMain {
>>     private static final Logger LOG = LogManager.getLogger(
>> ConsoleAppenderAnsiStyleNameLayoutMain.class);
>> 
>>     public static void main(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         try (final LoggerContext ctx = Configurator.initialize(
>> ConsoleAppenderAnsiMessagesMain.class.getName(),
>>                 "target/test-classes/log4j2-console-style-name-ansi.xml"))
>> {
>>             LOG.fatal("Fatal message.");
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutDefaultMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderHighlightLayoutDefaultMain.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutDefaultMain.java
>> index 4c3339d..16afa9b 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutDefaultMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutDefaultMain.java
>> @@ -32,6 +32,7 @@ public class ConsoleAppenderHighlightLayoutDefaultMain {
>>     private static final Logger LOG = LogManager.getLogger(
>> ConsoleAppenderHighlightLayoutDefaultMain.class);
>> 
>>     public static void main(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         try (final LoggerContext ctx = Configurator.initialize(
>> ConsoleAppenderAnsiMessagesMain.class.getName(),
>>                 "target/test-classes/log4j2-
>> console-highlight-default.xml")) {
>>             LOG.fatal("Fatal message.");
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderHighlightLayoutMain.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutMain.java
>> index 0ca7e8d..34c4355 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderHighlightLayoutMain.java
>> @@ -32,6 +32,7 @@ public class ConsoleAppenderHighlightLayoutMain {
>>     private static final Logger LOG = LogManager.getLogger(
>> ConsoleAppenderHighlightLayoutMain.class);
>> 
>>     public static void main(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         try (final LoggerContext ctx = Configurator.initialize(
>> ConsoleAppenderAnsiMessagesMain.class.getName(),
>>                 "target/test-classes/log4j2-console-highlight.xml")) {
>>             LOG.fatal("Fatal message.");
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderJAnsiMessageMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderJAnsiMessageMain.java b/log4j-core/src/test/java/
>> org/apache/logging/log4j/core/appender/ConsoleAppenderJAnsiMessageMai
>> n.java
>> index 6e54505..f800806 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderJAnsiMessageMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderJAnsiMessageMain.java
>> @@ -40,13 +40,13 @@ import org.junit.experimental.categories.Category;
>>  * <pre>
>>  * mvn -Dtest=org.apache.logging.log4j.core.appender.
>> ConsoleAppenderJAnsiMessageMain test
>>  * </pre>
>> - *
>> + *
>>  * or, on Windows:
>> - *
>> + *
>>  * <pre>
>>  * java -classpath log4j-core\target\test-classes;log4j-core\target\
>> classes;log4j-api\target\classes;%USERPROFILE%\.m2\
>> repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar;
>> org.apache.logging.log4j.core.appender.ConsoleAppenderJAnsiMessageMain
>> log4j-core/src/test/resources/log4j2-console-msg-ansi.xml
>>  * </pre>
>> - *
>> + *
>>  */
>> @Category(Layouts.Jansi.class)
>> public class ConsoleAppenderJAnsiMessageMain {
>> @@ -64,6 +64,7 @@ public class ConsoleAppenderJAnsiMessageMain {
>>     }
>> 
>>     public void test(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         // System.out.println(System.getProperty("java.class.path"));
>>         final String config = args == null || args.length == 0 ?
>> "target/test-classes/log4j2-console-msg-ansi.xml"
>>                 : args[0];
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderJAnsiXExceptionMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderJAnsiXExceptionMain.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderJAnsiXExceptionMain.java
>> index 7780a1d..34901ff 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderJAnsiXExceptionMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderJAnsiXExceptionMain.java
>> @@ -37,13 +37,13 @@ import org.junit.experimental.categories.Category;
>>  * <pre>
>>  * mvn -Dtest=org.apache.logging.log4j.core.appender.
>> ConsoleAppenderJAnsiXExceptionMain test
>>  * </pre>
>> - *
>> + *
>>  * or, on Windows:
>> - *
>> + *
>>  * <pre>
>>  * java -classpath log4j-core\target\test-classes;log4j-core\target\
>> classes;log4j-api\target\classes;%USERPROFILE%\.m2\
>> repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar;
>> org.apache.logging.log4j.core.appender.ConsoleAppenderJAnsiXExceptionMain
>> log4j-core/src/test/resources/log4j2-console-xex-ansi.xml
>>  * </pre>
>> - *
>> + *
>>  */
>> @Category(Layouts.Jansi.class)
>> public class ConsoleAppenderJAnsiXExceptionMain {
>> @@ -61,6 +61,7 @@ public class ConsoleAppenderJAnsiXExceptionMain {
>>     }
>> 
>>     public void test(final String[] args) {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>>         // System.out.println(System.getProperty("java.class.path"));
>>         final String config = args == null || args.length == 0 ?
>> "target/test-classes/log4j2-console-xex-ansi.xml"
>>                 : args[0];
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderNoAnsiStyleLayoutMain.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> appender/ConsoleAppenderNoAnsiStyleLayoutMain.java
>> b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderNoAnsiStyleLayoutMain.java
>> index bb08de4..3bc22d1 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderNoAnsiStyleLayoutMain.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/appender/
>> ConsoleAppenderNoAnsiStyleLayoutMain.java
>> @@ -29,7 +29,7 @@ import org.apache.logging.log4j.core.
>> config.Configurator;
>>  * <p>
>>  * Running from a Windows command line from the root of the project:
>>  * </p>
>> - *
>> + *
>>  * <pre>
>>  * java -classpath log4j-core\target\test-classes;log4j-core\target\
>> classes;log4j-api\target\classes;%HOME%\.m2\repository\
>> org\fusesource\jansi\jansi\1.14\jansi-1.14.jar;
>> org.apache.logging.log4j.core.appender.ConsoleAppenderNoAnsiStyleLayoutMain
>> log4j-core/target/test-classes/log4j2-console-style-ansi.xml
>>  * </pre>
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/log4j-core/src/test/java/org/apache/logging/log4j/core/pattern/
>> StyleConverterTest.java
>> ----------------------------------------------------------------------
>> diff --git a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> pattern/StyleConverterTest.java b/log4j-core/src/test/java/
>> org/apache/logging/log4j/core/pattern/StyleConverterTest.java
>> index ea62885..248fdc3 100644
>> --- a/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> pattern/StyleConverterTest.java
>> +++ b/log4j-core/src/test/java/org/apache/logging/log4j/core/
>> pattern/StyleConverterTest.java
>> @@ -24,6 +24,7 @@ import org.apache.logging.log4j.test.
>> appender.ListAppender;
>> import org.apache.logging.log4j.util.Strings;
>> import org.junit.Assert;
>> import org.junit.Before;
>> +import org.junit.BeforeClass;
>> import org.junit.Rule;
>> import org.junit.Test;
>> 
>> @@ -38,6 +39,11 @@ public class StyleConverterTest {
>>         "\u001B[1;31mERROR\u001B[m \u001B[1;36mLoggerTest\u001B[m
>> o.a.l.l.c.p.StyleConverterTest org.apache.logging.log4j.core.
>> pattern.StyleConverterTest"
>>         + Strings.LINE_SEPARATOR;
>> 
>> +    @BeforeClass
>> +    public static void beforeClass() {
>> +        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087:
>> explicitly enable
>> +    }
>> +
>>     @Rule
>>     public LoggerContextRule init = new LoggerContextRule("log4j-
>> style.xml");
>> 
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/src/changes/changes.xml
>> ----------------------------------------------------------------------
>> diff --git a/src/changes/changes.xml b/src/changes/changes.xml
>> index b8d560e..9dbdd75 100644
>> --- a/src/changes/changes.xml
>> +++ b/src/changes/changes.xml
>> @@ -31,6 +31,9 @@
>>          - "remove" - Removed
>>     -->
>>     <release version="2.10.0" date="2017-MM-DD" description="GA Release
>> 2.10.0">
>> +      <action issue="LOG4J2-2087" dev="rpopma" type="fix" due-to="Andy
>> Gumbrecht">
>> +        Jansi now needs to be enabled explicitly (by setting system
>> property `log4j.skipJansi` to `false`). To avoid causing problems for web
>> applications, Log4j will no longer automatically try to load Jansi without
>> explicit configuration.
>> +      </action>
>>       <action issue="LOG4J2-2060" dev="rpopma" type="fix">
>>         AbstractDatabaseManager should make a copy of LogEvents before
>> holding references to them: AsyncLogger log events are mutable.
>>       </action>
>> 
>> http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/
>> 73efe3dc/src/site/xdoc/manual/layouts.xml.vm
>> ----------------------------------------------------------------------
>> diff --git a/src/site/xdoc/manual/layouts.xml.vm b/src/site/xdoc/manual/
>> layouts.xml.vm
>> index d878a2e..1e8cfb3 100644
>> --- a/src/site/xdoc/manual/layouts.xml.vm
>> +++ b/src/site/xdoc/manual/layouts.xml.vm
>> @@ -912,17 +912,17 @@ WARN  [main]: Message 2</pre>
>>                 <p>
>>                   Specifying <code>%throwable{none}</code> or
>> <code>%throwable{0}</code> suppresses output of the exception.
>>                 </p>
>> -                <p>
>> -                  Use <code>filters(<i>packages</i>)</code> where
>> <i>packages</i> is a list of package names to
>> +                <p>
>> +                  Use <code>filters(<i>packages</i>)</code> where
>> <i>packages</i> is a list of package names to
>>                   suppress matching stack frames from stack traces.
>>                 </p>
>>                 <p>
>> -                  Use a <code>separator</code> string to separate the
>> lines of a stack trace. For example:
>> -                  <code>separator(|)</code>. The default value is the
>> <code>line.separator</code> system property,
>> +                  Use a <code>separator</code> string to separate the
>> lines of a stack trace. For example:
>> +                  <code>separator(|)</code>. The default value is the
>> <code>line.separator</code> system property,
>>                   which is operating system dependent.
>>                 </p>
>>                 <p>
>> -                  Use <code>ex{suffix(<i>pattern</i>)</code> to add the
>> output of <i>pattern</i> to the output only
>> +                  Use <code>ex{suffix(<i>pattern</i>)</code> to add the
>> output of <i>pattern</i> to the output only
>>                   when there is a throwable to print.
>>                 </p>
>>               </td>
>> @@ -944,6 +944,7 @@ WARN  [main]: Message 2</pre>
>>               </td>
>>               <td>
>>                 <p>Adds ANSI colors to the result of the enclosed pattern
>> based on the current event's logging level.
>> +                   (See Jansi <a href="#enable-jansi">configuration</a>.)
>>                 </p>
>>                 <p>The default colors for each level are:
>>                  <table>
>> @@ -1164,7 +1165,8 @@ WARN  [main]: Message 2</pre>
>>                 </p>
>>                 <!-- Copied and tweaked from Javadoc for
>> org.apache.logging.log4j.core.pattern.JAnsiMessageRenderer -->
>>                 <p>
>> -                  Add <code>{ansi}</code> to render messages with ANSI
>> escape codes (requires JAnsi.)
>> +                  Add <code>{ansi}</code> to render messages with ANSI
>> escape codes (requires JAnsi,
>> +                    see <a href="#enable-jansi">configuration</a>.)
>>                 </p>
>>                 <p>
>>                   The default syntax for embedded ANSI codes is:
>> @@ -1379,23 +1381,23 @@ WARN  [main]: Message 2</pre>
>>                 </p>
>>                 <p>
>>                   The throwable conversion word can be followed by an
>> option in the form
>> -                  <code>%rEx{short}</code> which will only output the
>> first line of the Throwable or
>> +                  <code>%rEx{short}</code> which will only output the
>> first line of the Throwable or
>>                   <code>%rEx{n}</code> where the first n lines of the
>> stack trace will be printed.
>>                 </p>
>> -                <p>
>> +                <p>
>>                   Specifying <code>%rEx{none}</code> or
>> <code>%rEx{0}</code> will suppress printing of the exception.
>>                 </p>
>> -                <p>
>> -                  Use <code>filters(<i>packages</i>)</code> where
>> <i>packages</i> is a list of package names to
>> +                <p>
>> +                  Use <code>filters(<i>packages</i>)</code> where
>> <i>packages</i> is a list of package names to
>>                   suppress matching stack frames from stack traces.
>>                 </p>
>>                 <p>
>> -                  Use a <code>separator</code> string to separate the
>> lines of a stack trace. For example:
>> -                  <code>separator(|)</code>. The default value is the
>> <code>line.separator</code> system property,
>> +                  Use a <code>separator</code> string to separate the
>> lines of a stack trace. For example:
>> +                  <code>separator(|)</code>. The default value is the
>> <code>line.separator</code> system property,
>>                   which is operating system dependent.
>>                 </p>
>>                 <p>
>> -                  Use <code>rEx{suffix(<i>pattern</i>)</code> to add the
>> output of <i>pattern</i> to the output only
>> +                  Use <code>rEx{suffix(<i>pattern</i>)</code> to add the
>> output of <i>pattern</i> to the output only
>>                   when there is a throwable to print.
>>                 </p>
>>               </td>
>> @@ -1418,6 +1420,7 @@ WARN  [main]: Message 2</pre>
>>               <td>
>>                 <p>Uses ANSI escape sequences to style the result of the
>> enclosed pattern. The style can consist of
>>                   a comma separated list of style names from the
>> following table.
>> +                  (See Jansi <a href="#enable-jansi">configuration</a>.)
>>                   <table>
>>                     <tr>
>>                       <th>Style Name</th>
>> @@ -1645,17 +1648,18 @@ WARN  [main]: Message 2</pre>
>>                   the first n lines of the stack trace will be printed.
>> Specifying <code>%xEx{none}</code>
>>                   or <code>%xEx{0}</code> will suppress printing of the
>> exception.
>>                 </p>
>> -                <p>
>> -                  Use <code>filters(<i>packages</i>)</code> where
>> <i>packages</i> is a list of package names to
>> +                <p>
>> +                  Use <code>filters(<i>packages</i>)</code> where
>> <i>packages</i> is a list of package names to
>>                   suppress matching stack frames from stack traces.
>>                 </p>
>>                 <p>
>> -                  Use a <code>separator</code> string to separate the
>> lines of a stack trace. For example:
>> -                  <code>separator(|)</code>. The default value is the
>> <code>line.separator</code> system property,
>> +                  Use a <code>separator</code> string to separate the
>> lines of a stack trace. For example:
>> +                  <code>separator(|)</code>. The default value is the
>> <code>line.separator</code> system property,
>>                   which is operating system dependent.
>>                 </p>
>>                 <p>
>>                  The <code>ansi</code> option renders stack traces with
>> ANSI escapes code using the JAnsi library.
>> +                    (See <a href="#enable-jansi">configuration</a>.)
>>                  Use <code>{ansi}</code> to use the default color
>> mapping. You can specify your own mappings with
>>                  <code>key=value</code> pairs. The keys are:
>>                 </p>
>> @@ -1821,11 +1825,17 @@ WARN  [main]: Message 2</pre>
>>             </tr>
>>             <caption align="top">Pattern Converters</caption>
>>           </table>
>> +          <a name="enable-jansi"></a>
>>           <h4>ANSI Styling on Windows</h4>
>>           <p>ANSI escape sequences are supported natively on many
>> platforms but are not by default on Windows. To
>> -            enable ANSI support simply add the <a href="
>> http://jansi.fusesource.org/";>Jansi</a> jar to your
>> -            application and Log4j will automatically make use of it when
>> writing to the console.
>> +            enable ANSI support add the <a href="http://jansi.fusesource.
>> org/">Jansi</a> jar to your application
>> +            and set property <code>log4j.skipJansi</code> to
>> <code>false</code>.
>> +            This allows Log4j to use Jansi to add ANSI escape codes when
>> writing to the console.
>>           </p>
>> +          <p>NOTE: Prior to Log4j 2.10, Jansi was enabled by default. The
>> fact that Jansi requires native code
>> +              means that Jansi can only be loaded by a single class
>> loader. For web applications this means the
>> +              Jansi jar has to be in the web container's classpath. To
>> avoid causing problems for web applications,
>> +              Log4j will no longer automatically try to load Jansi
>> without explicit configuration from Log4j 2.10 onward.</p>
>>           <h4>Example Patterns</h4>
>>           <h5>Filtered Throwables</h5>
>>           <p>This example shows how to filter out classes from
>> unimportant packages in stack traces.
>> 
>> 
> 
> 
> -- 
> Matt Sicker <[email protected]>

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