[
https://issues.apache.org/jira/browse/LOG4J2-965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Khotyn Huang updated LOG4J2-965:
--------------------------------
Description:
### Demonstration
The underlining project demonstrate the bug.
The project's build.gradle file:
{code:title=build.gradle}
apply plugin: 'java'
version = '1.0'
repositories {
mavenCentral()
}
def log4j2Version = '2.2'
def log4j2GroupId = "org.apache.logging.log4j"
dependencies {
compile log4j2GroupId + ':log4j-core:' + log4j2Version
compile log4j2GroupId + ":log4j-jcl:" + log4j2Version
compile log4j2GroupId + ":log4j-slf4j-impl:" + log4j2Version
compile 'org.fusesource.jansi:jansi:1.11'
}
{code}
A log4j2.xml in classpath:
{code:title=log4j2.xml}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<File name="root" fileName="${sys:user.home}/logs/windowsbug.log">
<PatternLayout>
<Pattern>%d %p %c{1.} [%t] %m%n</Pattern>
</PatternLayout>
</File>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="root"/>
</Root>
</Loggers>
</Configuration>
{code}
And the main class:
{code:title=Log4j2WindowsBug.java}
import org.slf4j.LoggerFactory;
/**
* @author khotyn 15/3/2 下午8:17
*/
public class Log4j2WindowsBug {
public static void main(String[] args) {
System.out.println("Able to print on Windows");
LoggerFactory.getLogger(Log4j2WindowsBug.class);
System.out.println("Unable to print on Windows");
}
}
{code}
The output of the demo is:
{code}
Able to print on Windows
{code}
The third line did not print to Windows console.
### Reason
It seems that log4j2 will wrapper System.out to WindowsAnsiOutputStream if
jansi is available in classpath. And in OutputStreamManager's close method, the
wrapper WindowsAnsiOutputStream is not considered, and cause the underling
System.out closed.
was:
### Demonstration
The underlining project demonstrate the bug.
The project's build.gradle file:
{code|title=build.gradle}
apply plugin: 'java'
version = '1.0'
repositories {
mavenCentral()
}
def log4j2Version = '2.2'
def log4j2GroupId = "org.apache.logging.log4j"
dependencies {
compile log4j2GroupId + ':log4j-core:' + log4j2Version
compile log4j2GroupId + ":log4j-jcl:" + log4j2Version
compile log4j2GroupId + ":log4j-slf4j-impl:" + log4j2Version
compile 'org.fusesource.jansi:jansi:1.11'
}
{code}
A log4j2.xml in classpath:
{code:title=log4j2.xml}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<File name="root" fileName="${sys:user.home}/logs/windowsbug.log">
<PatternLayout>
<Pattern>%d %p %c{1.} [%t] %m%n</Pattern>
</PatternLayout>
</File>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="root"/>
</Root>
</Loggers>
</Configuration>
{code}
And the main class:
{code:title=Log4j2WindowsBug.java}
import org.slf4j.LoggerFactory;
/**
* @author khotyn 15/3/2 下午8:17
*/
public class Log4j2WindowsBug {
public static void main(String[] args) {
System.out.println("Able to print on Windows");
LoggerFactory.getLogger(Log4j2WindowsBug.class);
System.out.println("Unable to print on Windows");
}
}
{code}
The output of the demo is:
{code}
Able to print on Windows
{code}
The third line did not print to Windows console.
### Reason
It seems that log4j2 will wrapper System.out to WindowsAnsiOutputStream if
jansi is available in classpath. And in OutputStreamManager's close method, the
wrapper WindowsAnsiOutputStream is not considered, and cause the underling
System.out closed.
> Log4j2 cause System.out unable to work on windows
> -------------------------------------------------
>
> Key: LOG4J2-965
> URL: https://issues.apache.org/jira/browse/LOG4J2-965
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.1
> Environment: Windows, with janis in classpath
> Reporter: Khotyn Huang
> Priority: Critical
>
> ### Demonstration
> The underlining project demonstrate the bug.
> The project's build.gradle file:
> {code:title=build.gradle}
> apply plugin: 'java'
> version = '1.0'
> repositories {
> mavenCentral()
> }
> def log4j2Version = '2.2'
> def log4j2GroupId = "org.apache.logging.log4j"
> dependencies {
> compile log4j2GroupId + ':log4j-core:' + log4j2Version
> compile log4j2GroupId + ":log4j-jcl:" + log4j2Version
> compile log4j2GroupId + ":log4j-slf4j-impl:" + log4j2Version
> compile 'org.fusesource.jansi:jansi:1.11'
> }
> {code}
> A log4j2.xml in classpath:
> {code:title=log4j2.xml}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="WARN">
> <Appenders>
> <File name="root" fileName="${sys:user.home}/logs/windowsbug.log">
> <PatternLayout>
> <Pattern>%d %p %c{1.} [%t] %m%n</Pattern>
> </PatternLayout>
> </File>
> </Appenders>
> <Loggers>
> <Root level="info">
> <AppenderRef ref="root"/>
> </Root>
> </Loggers>
> </Configuration>
> {code}
> And the main class:
> {code:title=Log4j2WindowsBug.java}
> import org.slf4j.LoggerFactory;
> /**
> * @author khotyn 15/3/2 下午8:17
> */
> public class Log4j2WindowsBug {
> public static void main(String[] args) {
> System.out.println("Able to print on Windows");
> LoggerFactory.getLogger(Log4j2WindowsBug.class);
> System.out.println("Unable to print on Windows");
> }
> }
> {code}
> The output of the demo is:
> {code}
> Able to print on Windows
> {code}
> The third line did not print to Windows console.
> ### Reason
> It seems that log4j2 will wrapper System.out to WindowsAnsiOutputStream if
> jansi is available in classpath. And in OutputStreamManager's close method,
> the wrapper WindowsAnsiOutputStream is not considered, and cause the
> underling System.out closed.
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