FAQ Database Discussion Community


How to flush Asynchronous loggers in Log4J2 (with disruptor)

asynchronous,log4j2
I'm using Log4J2 "Making All Loggers Asynchronous" section by setting: -DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector. https://logging.apache.org/log4j/2.x/manual/async.html I process a lot of logs and then stop the appenders before exiting: org.apache.logging.log4j.core.Logger coreLogger = (org.apache.logging.log4j.core.Logger) logger; org.apache.logging.log4j.core.LoggerContext context = (org.apache.logging.log4j.core.LoggerContext) coreLogger.getContext(); Map<String, Appender>...

How can I get the Apache Camel Message History in logfile from log4j?

java,log4j,apache-camel,log4j2
in the Apache Camel documantation is a nice Message History. I want this for my errorHandler. So I do errorHandler( deadLetterChannel("direct:deadLetter") .logExhaustedMessageHistory(true) .maximumRedeliveries(3) .retryAttemptedLogLevel(LoggingLevel.WARN) ); and also: CamelContext context = getContext(); context.setMessageHistory(true); But the nice Message History doesn't show, not in the Console and not in the Logfile. How can...

Log4j2 - log4j2.xml configuration

java,logging,log4j,log4j2
I am starting log4j2 new. I have a qquestion, I have a log4j2 xml file and i want to save logs in own level. Forexample info level logs save in info.txt file, error level logs save in error.txt file. This is mine log4j2.xml codes; <Properties> <Property name="log-path">logs</Property> </Properties> <Appenders> <Console...

Sending text message using Log4j2 with Flume

hadoop,log4j,bigdata,log4j2,flume
I have Log4j2 configuration: <?xml version="1.0" encoding="UTF-8"?> <configuration> <appenders> <Console name="console" target="SYSTEM_OUT"> <PatternLayout pattern="%d %-5p - %m%n"/> </Console> <Flume name="flume" > <MarkerFilter marker="FLUME" onMatch="ACCEPT" onMismatch="DENY"/> <Agent host="IP_HERE" port="6999"/> </Flume> <File name="file" fileName="flume.log"> <MarkerFilter marker="FLUME" onMatch="ACCEPT" onMismatch="DENY"/> </File> </appenders>...

Log4j 2 rollover not happening at expected time

log4j2
I am using log4j2 Rolling File appender for logging. The traffic for the logger is quite sparse. I want the logger to rollover the file at the appropriate time. How can i do that ? This is the output of ls -lrth command on the log files. -rw-r--r-- 1 root...

Log4J2 sync loggers faster than mixed async/sync loggers

java,logging,asynchronous,log4j2
Based on https://logging.apache.org/log4j/2.x/manual/async.html I want to use the Mixing Synchronous and Asynchronous Loggers approach in order to benefit from some performance improvement over the all synchronous loggers. The benchmark code: public static void main(String[] args) { org.apache.logging.log4j.Logger log4j2Logger = org.apache.logging.log4j.LogManager .getLogger("com.foo.Bar"); long start = System.currentTimeMillis(); int nbLogMessages = 1 *...

java.lang.NoSuchMethodError: org.apache.logging.log4j.core.lookup.MapLookup.toMap

java,maven,log4j,log4j2
I am trying to deploy a WAR file to a Glassfish 4.1 server. During an attempt at deployment, I receive the following exception : java.lang.Exception: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: java.lang.NoSuchMethodError: org.apache.logging.log4j.core.lookup.MapLookup.toMap(Ljava/util/List;)Ljava/util/Map; Looking in the javadoc, I indeed can't see any toMap method ? (https://logging.apache.org/log4j/2.0/log4j-core/apidocs/org/apache/logging/log4j/core/lookup/MapLookup.html) jar...

Same Appender log into 2 different files with Log4J2

configuration,log4j2
I would like to define 1 single Appender in my log4j2.xml configuration file, and using the magic of the Properties Substitution of Log4J2, be able to somehow log into 2 different files. I imagine the Appender would look something like: <RollingFile name="Rolling-${filename}" fileName="${filename}" filePattern="${filename}.%i.log.gz"> <PatternLayout> <pattern>%d %p %c{1.} [%t] %m%n</pattern>...

Log4j2 - Spring Test logger not found

java,spring,log4j2
ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. My hierarchy is this way App -> src -> main -> resources -> log4j.xml App -> src -> test -> test-resources -> log4j.xml And My Test class runs with this configuration @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations =...

log4j2 configuration not logging package starting with org to file

log4j2
I am migrating a project from log4j to log4j2. The project was using a log4j.properties file. Since log4j2 does not support properties file, i have been successful in writing a proper xml configuration file I believe... On running the project i noticed that where the errors from packages starting with...

Get Log4j2 log file location to write to directory containing a date

java,junit,log4j,log4j2
How can I get the location of a log4j log file? I tried this: Where can i programatically find where the log4j log files are stored? But it doesn't work for newer versions of log4j. I am creating the file with the system date inside it, but when I retrieve...

log4j2 not logging to console, file or syslog

java,servlets,logging,log4j2
I am struggling to get log4j2 to do any sort of logging. Even if I turn up log4j config to trace level I don't get any trace to debug with. This is using (or rather attempting to use) servlets 2.5 and log4j 2.1 I am a little bit lost as...

How to write a unit test for a custom logger in log4j2

java,unit-testing,logging,log4j2
I've created a couple of custom loggers with some levels that override the custom ones in Log4J2. I've followed the guide at http://logging.apache.org/log4j/2.x/manual/customloglevels.html. I need to create some unit test to verify that the events are being registered on their correct custom levels and configuration. I appreciate any hint on...

how to configure log4j2 webapplication

java,web-services,servlets,web-applications,log4j2
Am little new to web applications, recently I was in need to employ a logging mechanism and for that I choose Log4J2, I went through there guide, and downloaded required libraries. This is what so far I did. 1. Added following jars to web-inf/lib -- log4j-core2.1.jar -- log4j-api-2.1.jar -- log4j-web-2.1.jar...

Logging with log4j2 in Spring Boot app

java,spring,maven,logging,log4j2
I am trying to learn Spring Boot. But I completely mess up with a loggers dependencies. I have a simple pom: <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- Logging --> <dependency>...

Different level of logs in different log files

log4j2
How can we write a simple log4j2.xml file with different levels of logs going into different files? For example we have error logs any info logs I need to push all error log messages into one log file and all info log messages into another file. <?xml version="1.0" encoding="UTF-8"?> <Configuration...

Error while integrating slf4j over log4j

maven,spring-mvc,logging,slf4j,log4j2
I am integrating sl4j over log4j for logging in my spring application, but while starting my tomcat , I am getting an error as : SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/E:/apache-tomcat-8/apache-tomcat-8.0.3/webapp s/ROOT/WEB-INF/lib/slf4j-jdk14-1.5.6.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/E:/apache-tomcat-8/apache-tomcat-8.0.3/webapps/ROOT/WEB-INF/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in...

log4j2 equivalent for log4j.defaultInitOverride

configuration,log4j2
Is there any way to tell log4j2 not to automatically load the log4j.configurationFile? It was possible with log4j1 with "log4j.defaultInitOverride"...

How to use log4j2 JMSAppender with ActiveMQ

java,jms,activemq,jndi,log4j2
I am struggling to write a simple POC program that logs messages to a Queue. All tutorials and Q&As I find (here and here) use log4j version 1.2 and they put messages onto a Topic and not onto a queue. My requirement is to log to a queue. I followed...

Configure Log4J2 with a System property to use a URL

log4j2,system-properties
Log4j2 accepts: -Dlog4j.configurationFile=path/to/log4j2.xml @see https://logging.apache.org/log4j/2.0/faq.html But we used to be able to use a real URL like http://host/configuration.xml. Is there a way to achieve this or has it been removed forever?...

Create lazy messages in log4j2

java,java-8,log4j2
I have this code: import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; public class Test { private static final Logger logger = LogManager.getLogger(); public static void main (String[] args) { logger.info("Text: {}", getText()); } static String getText() { // Expensive action using IO return ""; } } In my log4j2.json, the logger is set...

Is there a way to Route logs based on Marker with the RoutingAppender in Log4j2

java,logging,log4j2
It is possible to filter messages using markers, such as : <MarkerFilter marker="FLOW" onMatch="ACCEPT" onMismatch="DENY"/> However I'm trying to route a message based on the marker using the RoutingAppender. I don't want to filter the same arguments multiple times in multiple Appenders. Here's my configuration sample (yaml): Routing: name: ROUTING_APPENDER...

How to check if log4j2 has been configured or not

configuration,log4j2
We're all familiar with this message when you don't provide a configuration for log4j2: ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. How can I check if log4j2 is not yet configured so that I can initialize with a default configuration if...

Log4j2 api cannot find Log4j2 core in OSGi environment

java,logging,log4j,osgi,log4j2
I'm trying to use log4j2 OSGi bundles, but it seems log4j2 api cannot find log4j2 core in an OSGi environment. I'm continuously getting the following exception : ERROR StatusLogger Log4j2 could not find a logging implementation. Please add log4j-core to the classpath. Using SimpleLogger to log to the console I...

Struts2 + Log4j2

java,struts2,log4j2
I'm developing a Struts2 webapp and i was setting up the logger. In the official documentation there is only the configuration for log4j, but nothing about log4j2. I started looking around and seems that Struts2 does not support log4j2. But the last question i've found is this one: Log4j2.0 is...

Log4j2 : How to configure multiple Appender with same type in Yaml configuration

yaml,log4j2,rollingfileappender
I'm trying to have 2 RollingRandomAccessFile in the same YAML configuration. I'm able to do it in XML but not in YAML. As a result, I want two files "application.log" and "payload.log". Here's my working XML configuration : <?xml version="1.0" encoding="UTF-8"?> <Configuration status="debug"> <Appenders> <Console name="CONSOLE" target="SYSTEM_OUT"> <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t]...

inherit method to logger interface in log4j2 pkg

java,oop,inheritance,logging,log4j2
I have a method import org.apache.logging.log4j.Logger; public class SendEmail { Logger log = LogManager.getRootLogger(); public static String getStackTrace(final Throwable throwable) { final StringWriter sw = new StringWriter(); final PrintWriter pw = new PrintWriter(sw, true); throwable.printStackTrace(pw); return sw.getBuffer().toString(); } public static void main(String[] args) { try { //Some Code } catch...

log4j 2 - is it possible to use multiple markers for one log message?

logging,filter,log4j2
I would like to do something like logger.debug(new Marker[]{SQL_UPDATE,USER},"Updating user account"); Then I can filter either each SQL_UPDATE and/or each log regarding USER database. Is it possible to achieve it somehow? One solution would be to use specific log message for example I would use some specific text like @SQL_UP...

liberty profile configuration issue (log4j2)

java,log4j2,jvm-arguments,websphere-liberty
I can successfully set up log4j logging by setting up the following line within my jvm.options file: -Dlog4j.configurationFile=C:/eclipse/runtime/usr/servers/tmpServer/log4j2.xml However, I want to change this, so the path is not hard coded. I was hoping this would work: -Dlog4j.configurationFile=${server.config.dir}/log4j2.xml But it does not. Any ideas why not? I'm using liberty profile,...

log4j - Configuring logger name

java,logging,log4j,log4j2
I've been using log4j for some time. One thing I've never really understood is why they recommend configuring the logger name from the class. Specifically, I wonder: What is the difference the three logger declarations? Which is better and why? Is there a method that allows copy and paste log...

I would like to know if Log4j2 has been built with that in mind or if things may (crash | lose logs | etc) at very high concurrency

log4j2
This question has been askedfor log4j but not log4j2: Is it safe to use the same log file by two different appenders Technically, you can create multiple appenders in Log4j2 that write in the same file. This seems to work well. Here's my OS / JDK : Oracle JDK 7u45...

How to log FATAL (or any custom log level) with SLF4J and Log4j2

java,slf4j,log4j2
I have those specific requirements : Need to be able to log in FATAL level Need to use SLF4J Need to use Log4j2 Right now, here's my implementation: final Logger logger = LoggerFactory.getLogger(HelloWorld.class); final Marker marker = MarkerFactory.getMarker("FATAL"); logger.error(marker, "!!! Fatal World !!!"); Here's my PatternLayout (in yaml): PatternLayout: Pattern:...

log4j2 does not work with tomcat

java,tomcat,log4j,war,log4j2
I have a Web Application delpoyed to the Tomcat Server. It has to log something to a file. When I do the same from a standalone application, it works (logs to file, to console, whatever), but nothing happens from Tomcat. Here's my configuration file: <?xml version="1.0" encoding="UTF-8"?> <Configuration status="info"> <Properties>...

Filtering out hibernate logs in log4j2 file

java,hibernate,logging,log4j,log4j2
I have a log4j2.xml file as follows. It's working, but it's picking up a lot of hibernate and GWT log files. How can I exclude those packages, or, how can I have my logfile only include logging from my package hiearchy? <?xml version="1.0" encoding="UTF-8"?> <Configuration status="INFO"> <Appenders> <Console name="Console" target="SYSTEM_OUT">...

How to define log4j2 path by application.properties?

java,spring,log4j,log4j2
I want to have different log4j2 log directories based on the current active profile. But it does not work. #application.properties: spring.profiles.active=dev log.path=d:/${spring.profiles.active} #log4j2.xml: <Properties> <property name="path">${bundle:application:log.path}</property> </Properties> Result: a folder is created on d:/ called ${spring.profiles.active} instead of resolving to the real spring profile name. Why?...

Log4j2 RollingFile appender sometimes not rolling over after midnight

log4j2,rollingfileappender
I have a RollingFile appender <RollingFile name="xxx" fileName="${sys:catalina.base}/logs/request.log" filePattern="${sys:catalina.base}/logs/request.log.%d{yyyy-MM-dd}.%i.gz"> <PatternLayout> <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %msg%n</Pattern> </PatternLayout> <Policies> <OnStartupTriggeringPolicy /> <TimeBasedTriggeringPolicy /> <SizeBasedTriggeringPolicy size="5 MB"/> </Policies> <MarkerFilter marker="REQUEST_MARKER" onMatch="ACCEPT"...

How to configure log4j2 to log for HikariCP

java,slf4j,log4j2,hikaricp
I have written a small Gradle project so that I can learn how to configure HikariCP and JDBC and Log4j2 all together in the same project. I have placed the below log4j2 config in the src/main/resources directory in my project. When I execute the project using gradle run I get...

Log4J2 Factory Error when attempting to use SMTP Appender

java,email,logging,log4j2,smtpappender
Good afternoon, When I attempt to use the SMTP Appender, I get an odd error in the console. The error appears to occur when the XML file is loaded, as it isn't logged via any output stream except stdout. The contents of the appender are as follows (and I have...

How to create custom RewritePolicy in log4j2?

log4j2
I'm trying to code my own RewritePolicy in Log4j2. The documentation states that : RewritePolicy is an interface that allows implementations to inspect and possibly modify LogEvents before they are passed to Appender. RewritePolicy declares a single method named rewrite that must be implemented. The method is passed the LogEvent...

log4j2 and syslog, using RFC5424 format does not show varargs part of log message

java,log4j2,syslog
I have this syslog appender configured: <Syslog name="syslog" format="RFC5424" host="localhost" port="514" protocol="UDP" appName="" includeMDC="true" facility="LOCAL0" enterpriseNumber="" newLine="true" messageId="" id=""> <LoggerFields> <KeyValuePair key="c" value="%c{1}" /> <KeyValuePair key="l" value="%p" /> <KeyValuePair key="t" value="%t" /> </LoggerFields> </Syslog> The log messages in local0 do not get the varargs part of the log4j2 output. For...

Log4j2 not creating log files

java,logging,configuration,log4j2
I am trying out log4j2 configuration <?xml version="1.0" encoding="UTF-8"?> <configuration status="info"> <appenders> <Console name="console-log" target="SYSTEM_OUT" append="false"> <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/> <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36}:%L %M - %msg%xEx%n"/> </Console> <File name="debug-log" fileName="${catalina.base}/logs/debug.log" append="false"> <PatternLayout pattern="%d{yyyy-MM-dd 'at' HH:mm:ss.SSS z}...

how to reinitialize log4j2 configuration?

configuration,log4j2
After an initial configuration of log4j2 with: Configurator.initialize(null, configLocation); I would like to reinitialize it with a different URL Configurator.initialize(null, configLocation2); The problem is that the second call is ignored. I believe that once the LoggerContext is STARTED it will ignore reconfigurations. Is there a way to do this? ...

log4j2 - unresolved symbol debug

java,servlets,logging,log4j2
This is using (or rather attempting to use) servlets 2.5 and log4j 2.1 The line logger.debug("test") yields cannot resolve symbol debug. I am a little bit lost as for the reason why because I've followed all the docs as far as I can tell ? package myPkg; import javax.ws.rs.GET; import...

How to get jar class is coming from

java,eclipse,api,plugins,log4j2
I am currently working on an API for a server software so users can extend my software by programming plugins for it instead of modifying the software themselves, and allow other users without programming knowledge to easily change the software by adding these plugins. So far, everything is working fine....

Log4j2 why would you use it over log4j? [closed]

java,log4j,log4j2
I must be missing something but I have been looking at this for a few days now, but why on earth would you ever use log4j2 over log4j (other than the performance)? From what I have seen so far, log4j2 is advertised as simpler to configure, but its actually vastly...

Convert log4j 1.2 configuration related to JUL to log4j 2 configuration

java,logging,log4j,log4j2
I'm converting an application from log4j 1.2 to log4j2. In the log4j.properties file I found follwoing configurations which relats to Java util logging. handlers=java.util.logging.ConsoleHandler java.util.logging.ConsoleHandler.level=SEVERE How can I convert this configurations to log4j2 configuration ? Thanks!...

Do I need to create seperate OSGi bundles for each jar

maven,log4j,osgi,log4j2,osgi-bundle
I want to create an OSGi bundle for log4j2. I need to use some additional jars along with log4j2 such as log4j2-jcl, log4j2-jul, log4j2-web etc. I want to clarify some confusions listed below about this. However this is not specific to log4j2 I'm asking this as a general procedure. Do...

log4j2.xml sys vs env on Desktop application and in Tomcat Webapp

tomcat,logging,tomcat7,environment-variables,log4j2
I have both a dekstop application and a tomcat web application that write to a log file using log4j2. I also then have the log4j2.xml configuration file. The file it is writing to is held within a folder that as stored as an environment variable. The log4j2.xml file thus looks...

Transitive log4j2 dependency - configuration failing

java,maven,logging,jvm,log4j2
Im working on a project that has log4j2 as a transitive dependency. I was having this error ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. So I created a new log4j2.xml file under src/main/resources and I tried with the Default Apache's configuration....

Mule 3.6.1 and Logentries using log4j2

mule,mule-studio,log4j2,logentries
We are building our application with Mule 3.6.1. In order to overwrite their log, we need to use log4j2.xml. I followed the example for making one here: https://logentries.com/doc/java/. When I run our application I am getting: 2015-05-06 09:56:37,603 ERROR Error processing element Logentries: CLASS_NOT_FOUND 2015-05-06 09:56:37,606 ERROR Unable to locate...

Reload log4j2 configuration on demand

java,log4j,log4j2
I have my log4j2.xml config file set to be checked every 30 seconds: <Configuration status="WARN" monitorInterval="30"> ... </Configuration> Is it possible to programmatically tell log4j2 to check for changes in the configuration instead of having a timeout? N.B. I don't want to programmatically load the configuration specifying the config file,...

Unable to create multiple log files based on the ThreadContext map values using routing appender in log4j2

java,oracle-adf,log4j2,threadcontext
I'm using the log4j2 jars in the oracle adf application build on 12c. Requirement: Create multiple log files based on the session and ability to change the logging properties dynamically. Log4j2.xml file <?xml version="1.0" encoding="UTF-8"?> <Configuration status="trace" packages="apps.adfAppUI.ui.bean"> <Appenders> <File name="file" fileName="./adfAppCustomLogs/TestLog4j2.log"> <PatternLayout> <Pattern>%d{YYYY-MM-dd HH:mm:ss.SSS} %-5level %class %L %M -...

Transitioning from log4net to log4j 2

logging,log4j,log4net,log4j2
I am working on a project in java which uses log4j2 and want to setup logging the same as I had in older project in .NET using log4net. There are some things I cant figure out, how to do in the log4j2. How can I force log4j2 appender to put...

Where to define the date/time pattern for TimeBasedTriggeringPolicy in Log4j2

java,logging,log4j2
I am new in Log4j2 and want to use the RollingFileAppender. Further as rollover I want to use the TimeBaseTriggeringPolicy: The TimeBasedTriggeringPolicy causes a rollover once the date/time pattern no longer applies to the active file. On the site above there is an example for such an TimeBasedTriggeringPolicy: <?xml version="1.0"...

Log4j2's FailoverAppender Error: appender Failover has no parameter that matches element Failovers

java,logging,log4j2,failover,appender
When I compile my spring 3.2.9 web application using log4j 2.1, this error appears in the console: 2015-02-02 12:08:25,213 ERROR appender Failover has no parameter that matches element Failovers What I understand is that the element "Failovers" does not exist inside the element "Failover", right? Why would this happen? I...

How to change log4j2 logging path on tomcat?

java,spring,log4j,spring-boot,log4j2
I'm running a webapp on tomcat using spring-boot. How could I change the log4j2.xml logging path dynamically? (eg by jvm args, property file, or else)? So far I configured the log xml as follows: <Configuration> <Properties> <property name="path">${bundle:application:log.path}</property> </Properties> </Configuration> With configuration file: #application.properties: log.path=d:/ Now I want to dynamically...

Can I make log4j use the configuration in my resources folder?

java,maven,log4j2
Getting log4j to work is way more complicated than advertised. I keep getting this error: ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. I have tried to put my log4j.xml file all over the place, but what I want it is to...

Log4j2 on Tomcat on Windows produces warning “unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream”

java,eclipse,windows,tomcat,log4j2
I have a web app deployed on Tomcat 8. My dev env is Eclipse (Luna) on Windows 7 x64. I just finished integrating log4j2 in my code. When I start up Tomcat, I see the following warning: WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream I did extensive googling but could not see...

How to lookup property parameter in web app for log4j2?

java,spring,tomcat,log4j,log4j2
I want to configure log4j2 to lookup the logging path dynamically from web startup (tomcat). From the docs (http://logging.apache.org/log4j/2.x/manual/lookups.html) there is a web: lookup with different parameter possibilities. At first I'm trying the provided example: <Appenders> <File name="ApplicationLog" fileName="${web:rootDir}/app.log"/> </Appenders> Result: ERROR Unable to create file ${web:rootDir}/app.log java.io.IOException I also...

what is the difference between Log4j 2 SLF4J Binding and Log4j 2 to SLF4J Adapter

java,slf4j,log4j2
As the title, what is the difference between 2 of them. And when is better to use Log4j 2 SLF4J Binding, and when is better to use Log4j 2 to SLF4J Adapter?...