How to catch third party console log using log4j

How to catch third party console log using log4j

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How to catch third party console log using log4j
Tag : java , By : user171752
Date : November 28 2020, 11:01 PM

I wish this help you You can try this to log STDOUT as INFO and STDERR as WARNING for example:
final Logger myLog4jLogger = Logger.getLogger(getClass());

System.setOut(new PrintStream(new ByteArrayOutputStream() {
    public synchronized void write(byte[] pB, int pOff, int pLen) {
        super.write(pB, pOff, pLen);

System.setErr(new PrintStream(new ByteArrayOutputStream() {
    public synchronized void write(byte[] pB, int pOff, int pLen) {
        super.write(pB, pOff, pLen);
<appender name="FILE" class="ch.qos.logback.core.FileAppender">

     <pattern>%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n</pattern>
<appender-ref ref="STDOUT" />
<appender-ref ref="FILE" />

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How can I get log4j to use a log4j.xml file and not write to console when using Spring?

Tag : java , By : John Miller
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further By default, log4j doesn't make any assumptions about its configuration, it definitely expects either a configuration file or a programmatic configuration.
It scans through the classpath for log4j.properties or log4j.xml. If you prefer a different path and different name, you need pass a system variable something like -Dlog4j.configuration=relative_path_to_file.xml

Log4j synchronous I want to catch log4j:ERROR setFile(null,true) call failed

Tag : java , By : Julian Ivanov
Date : March 29 2020, 07:55 AM
To fix this issue I want to send log info, to a "audit" file. I have thought about using log4j with an exclusive Appender: , You can force log4j configuration processing by calling:
DOMConfigurator.configureAndWatch( log4jConfigPath );
<appender name="file" class="org.apache.log4j.DailyRollingFileAppender">
  <errorHandler class="org.apache.log4j.varia.FallbackErrorHandler">
       <appender-ref ref="console"/>
  <param name="File" value="C:/temp/test.log"/>
  <layout class="org.apache.log4j.PatternLayout">
    <param name="ConversionPattern" value="%d %-5p %30.30c - %m%n"/>

Mixing log4j 1.x and log4j 2 with third party libraries dependending on log4j 1.x

Tag : java , By : Bobblegate
Date : March 29 2020, 07:55 AM
Does that help I've done so myself. I don't think there will be any issue. Even the project I did for had third party libraries.
You can use log4j-1.2-api-2.x.jar simply. Remove your older log4j-1.2.x.jar and replace with below three jars:

Log4j logs show on console without log4j.properties

Tag : java , By : Sergio Rudenko
Date : March 29 2020, 07:55 AM
this will help For spring boot with log4j, you need to use spring-boot-starter-log4j2 dependency.Please follow the below link for the solution.

Log4j 2 performance: is single-threaded Console logging faster in Logback than Log4j 2?

Tag : java , By : Bo.
Date : March 29 2020, 07:55 AM
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