Log4j 1.x Migration API Configuration Web Applications and JSPs Lookups Appenders Layouts Filters Async Loggers Garbage-free Logging JMX Logging Separation Extending Log4j Plugins Programmatic Log4j Configuration Custom Log Levels In Code In Configuration log level hierarchy Adding or Replacing Levels Custom Loggers Custom Logger Example Code Generation Tool Legacy
Log4j Log Level
Log4j 1.2 Log4j 2.3 Components API Implementation Commons Logging Bridge Log4j 1.2 API SLF4J Binding JUL Adapter Scala 2.10 log4j2 log levels API Scala 2.11 API Log4j 2 to SLF4J Adapter Apache Flume Appender Log4j Tag Library Log4j JMX GUI Log4j Web Application Support Log4j NoSQL support Log4j IO Streams Log4j Liquibase Binding Project Information
Logging Levels Java
Dependencies Dependency Convergence Dependency Management Project Team Mailing Lists Issue Tracking Project License Source Repository Project Summary Project Reports Changes Report JIRA Report Surefire Report RAT Report Custom Log Levels Defining Custom Log Levels in Code Log4J 2 supports custom log levels. Custom log levels can be defined in code or in configuration. To define a custom log level in code, use the Level.forName() method. slf4j log levels This method creates a new level for the specified name. After a log level is defined you can log messages at this level by calling the Logger.log() method and passing the custom log level: // This creates the "VERBOSE" level if it does not exist yet. final Level VERBOSE = Level.forName("VERBOSE", 550); final Logger logger = LogManager.getLogger(); logger.log(VERBOSE, "a verbose message"); // use the custom VERBOSE level // Create and use a new custom level "DIAG". logger.log(Level.forName("DIAG", 350), "a diagnostic message"); // Use (don't create) the "DIAG" custom level. // Only do this *after* the custom level is created! logger.log(Level.getLevel("DIAG"), "another diagnostic message"); // Using an undefined level results in an error: Level.getLevel() returns null, // and logger.log(null, "message") throws an exception. logger.log(Level.getLevel("FORGOT_TO_DEFINE"), "some message"); // throws exception! When defining a custom log level, the intLevel parameter (550 and 350 in the example above) determines where the custom level exists in relation to the standard levels built-in to Log4J 2. For reference, the table below shows the intLevel of the built-in log levels. Standard log levels built-in to Log4J Standard Level intLevel OFF 0 FATAL 100 ERROR 200 WARN 300 INFO 400 DE
All Implemented Interfaces: Serializable Direct Known Subclasses: UtilLoggingLevel public class Levelextends Priorityimplements Serializable
Syslog Logging Levels
Defines the minimum set of levels recognized by
Log4j Set Log Level
the system, that is OFF, FATAL, ERROR, WARN, INFODEBUG and ALL. log level regression The Level class may be subclassed to define a larger level set. Author: Ceki Gülcü See Also:Serialized Form Field https://logging.apache.org/log4j/2.x/manual/customloglevels.html Summary staticLevelALL The ALL has the lowest possible rank and is intended to turn on all logging. staticLevelDEBUG The DEBUG Level designates fine-grained informational events that are most https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html useful to debug an application. staticLevelERROR The ERROR level designates error events that might still allow the application to continue running. staticLevelFATAL The FATAL level designates very severe error events that will presumably lead the application to abort. staticLevelINFO The INFO level designates informational messages that highlight the progress of the application at coarse-grained level. staticLevelOFF The OFF has the highest possible rank and is intended to turn off logging. staticLevelTRACE The TRACE Level designates finer-grained informational events than the DEBUG
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://stackoverflow.com/questions/2342280/difference-between-logger-info-and-logger-debug this site About Us Learn more about Stack Overflow the company Business Learn https://github.com/NLog/NLog/wiki/Log-levels more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up log level Difference between logger.info and logger.debug up vote 41 down vote favorite 21 What is the difference between logger.debug and logger.info ? When will logger.debug be printed? java logging log4j share|improve this question edited Sep 25 '14 at 17:48 Oliver Lloyd 3,16042248 asked Feb 26 '10 at 14:33 Senthilnathan 292258 add a comment| 5 Answers 5 active oldest votes up vote 10 down vote accepted log level debug This will depend on the logging configuration. The default value will depend on the framework being used. The idea is that later on by changing a configuration setting from INFO to DEBUG you will see a ton of more (or less if the other way around) lines printed without recompiling the whole application. If you think which one to use then it boils down to thinking what you want to see on which level. For other levels for example in Log4J look at the API, http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html share|improve this answer answered Feb 26 '10 at 14:38 toomasr 2,73211830 add a comment| up vote 78 down vote I suggest you look at the article called "Short Introduction to log4j". It contains a short explanation of log levels and demonstrates how they can be used in practice. The basic idea of log levels is that you want to be able to configure how much detail the logs contain depending on the situation. For example, if you are trying to troubleshoot an issue, you would want the logs to be very verbose. In production, you might only want to see warnings
Sign in Pricing Blog Support Search GitHub This repository Watch 245 Star 1,928 Fork 675 NLog/NLog Code Issues 186 Pull requests 22 Projects 3 Wiki Pulse Graphs Log levels Julian Verdurmen edited this page Sep 4, 2016 · 11 revisions Pages 167 Home All Event Properties Layout Renderer AppDomain Layout Renderer AppSetting Layout Renderer ASP .Net Cookie Layout Renderer ASP .Net Core Host Layout Renderer ASP .Net MVC Action Layout Renderer ASP .Net MVC Controller Layout Renderer ASP .Net Query String Layout Renderer ASP .Net Request Method Layout Renderer ASP .Net Request Referrer Renderer ASP .Net UserAgent Layout Renderer AspApplication layout renderer AspNetApplication layout renderer AspNetBufferingWrapper target AspNetItem layout renderer AspNetRequest layout renderer AspNetSession layout renderer AspNetSessionId layout renderer AspNetTrace target AspNetUserAuthType layout renderer AspNetUserIdentity layout renderer AspRequest layout renderer AspResponse target AspSession layout renderer AssemblyVersion Layout Renderer AsyncWrapper target AutoFlushWrapper target Basedir layout renderer BufferingWrapper target Cached Layout Renderer Callsite layout renderer Callsite line number layout renderer Chainsaw target ColoredConsole target CompoundLayout Conditions Configuration API Configuration file Configure component logging Console target Counter layout renderer CsvLayout Data types Database target Date layout renderer Debug target Debugger target DocumentUri layout renderer Elmah target Environment layout renderer Event Context Layout Renderer EventContext layout renderer Eventlog target EventProperties Layout Renderer Examples Exception layout renderer Extending NLog FallbackGroup target FAQ File target FileContents layout renderer Filesystem Normalize Layout Renderer FilteringWrapper target Filters Fluent API FormControl target Gc layout renderer Gdc layout renderer Guid layout renderer How to Log Exceptions How to write a Target Identity layout renderer IIS site name Layout Renderer ImpersonatingWrapper target InstallContext layout renderer Internal Logging JSON Encode Layout Renderer JsonLayout Layout Layout Renderers Layouts LayoutWithHeaderAndFooter Level layout renderer Literal Layout Renderer Log levels Log4JXMLEvent Layout Renderer Log4JXmlEventLayout Logger Layout Renderer Logging Troubleshooting LogReceiverService target Longdate Lay
All Debug Info Warn Error Fatal Off table id toc tbody tr td div id toctitle Contents div ul li a href Log j Debug Levels a li li a href Logger Levels Java a li li a href Log j Trace a li li a href Trace Level Definition a li ul td tr tbody table p All Implemented Interfaces Serializable Direct relatedl Known Subclasses UtilLoggingLevel public class Levelextends log level hierarchy Priorityimplements Serializable DL Defines the minimum set of p h id Log j Debug Levels p levels recognized by the system that is OFF FATAL ERROR WARN
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Debug Info Warn Error Fatal Log j table id toc tbody tr td div id toctitle Contents div ul li a href Log j Levels Order a li li a href Log j Trace a li li a href Slf j Log Levels a li li a href Log j Set Log Level a li ul td tr tbody table p All Implemented Interfaces Serializable Direct relatedl Known Subclasses UtilLoggingLevel public class Levelextends p h id Log j Levels Order p Priorityimplements Serializable DL Defines the minimum set of log levels log j levels recognized by the system that is
Debug Info Warning Error Critical table id toc tbody tr td div id toctitle Contents div ul li a href Log Level Trace Vs Debug a li li a href Trace Level Definition a li li a href Log j Debug Levels a li ul td tr tbody table p Pooling DRCP IBM Systems Director raquo Log J Levels ALL relatedl TRACE DEBUG INFO WARN log level hierarchy ERROR FATAL OFF Jesse Hu Loggers may log j trace vs debug be assigned levels The set of possible levels that is DEBUG INFO WARN ERROR and p h id Log Level
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Error Levels Log net table id toc tbody tr td div id toctitle Contents div ul li a href Log net Log Levels Enum a li li a href Log net Log All Levels a li li a href Log net Custom Log Level a li li a href Log net Set Log Level a li ul td tr tbody table p Apps Config Examples Building FAQ How Tos SDK Reference Manual relatedl Introduction Configuration Contexts Plugins Repositories Internals Community Mailing log net log levels Lists Issue Tracking Development Repository Continuous Integration Project Documentation p h id Log net Log
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Fatal Error Warn Info Debug table id toc tbody tr td div id toctitle Contents div ul li a href Log Level Hierarchy a li li a href Log Level Trace Vs Debug a li li a href Logging Levels Java a li li a href Syslog Logging Levels a li ul td tr tbody table p All Implemented relatedl Interfaces Serializable Direct Known p h id Log Level Hierarchy p Subclasses UtilLoggingLevel public class Levelextends Priorityimplements Serializable DL log j debug levels Defines the minimum set of levels recognized by the system p h id Log Level Trace Vs
Info Debug Error table id toc tbody tr td div id toctitle Contents div ul li a href Log Level Hierarchy a li li a href Debug Level Samsung a li li a href Log j Log Levels a li li a href Slf j Log Levels a li ul td tr tbody table p Pooling DRCP IBM Systems Director raquo Log J Levels ALL TRACE DEBUG INFO WARN ERROR relatedl FATAL OFF Jesse Hu Loggers may be assigned p h id Log Level Hierarchy p levels The set of possible levels that is DEBUG INFO WARN ERROR log j
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Log j Error Debug table id toc tbody tr td div id toctitle Contents div ul li a href Log j Log Levels a li li a href Logging Levels Cisco a li li a href Slf j Log Levels a li li a href Syslog Logging Levels a li ul td tr tbody table p All Implemented Interfaces Serializable relatedl Direct Known Subclasses UtilLoggingLevel public log j levels order class Levelextends Priorityimplements Serializable DL Defines the minimum p h id Log j Log Levels p set of levels recognized by the system that is OFF FATAL log j set
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Log j Error Warn Info table id toc tbody tr td div id toctitle Contents div ul li a href Log Levels Log j a li li a href Log j Set Log Level a li li a href Syslog Logging Levels a li ul td tr tbody table p All Implemented Interfaces Serializable Direct Known Subclasses UtilLoggingLevel public relatedl class Levelextends Priorityimplements Serializable DL Defines the log j levels order minimum set of levels recognized by the system p h id Log Levels Log j p that is OFF FATAL ERROR WARN INFO code code DEBUG and ALL The
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Log j Debug Info Error table id toc tbody tr td div id toctitle Contents div ul li a href Log j Threshold a li li a href Logger Levels Java a li li a href Slf j Log Levels a li ul td tr tbody table p All relatedl Implemented Interfaces Serializable Direct Known log j levels order Subclasses UtilLoggingLevel public class Levelextends Priorityimplements Serializable DL org apache log j level jar Defines the minimum set of levels recognized by the system log j log levels that is OFF FATAL ERROR WARN INFO code code DEBUG and ALL The
Log j Trace Debug Error table id toc tbody tr td div id toctitle Contents div ul li a href Org apache log j level Jar a li li a href Logger Levels Java a li li a href Log j Logging a li ul td tr tbody table p Pooling DRCP IBM Systems Director raquo Log J Levels ALL TRACE DEBUG INFO relatedl WARN ERROR FATAL OFF Jesse log j levels order Hu Loggers may be assigned levels The set of possible levels that p h id Org apache log j level Jar p is DEBUG INFO WARN ERROR
Log Error Information table id toc tbody tr td div id toctitle Contents div ul li a href Log Level Hierarchy a li li a href Log Levels Log j a li li a href Logging Levels Java a li li a href Log warn Java a li ul td tr tbody table p Log relatedl All Known Implementing Classes AvalonLogger p h id Log Level Hierarchy p Jdk LumberjackLogger Jdk Logger Log JLogger LogKitLogger NoOpLog SimpleLog public interface logging levels python Log A simple logging interface abstracting logging APIs In order to be log info java instantiated successfully by
Log j Error Fatal table id toc tbody tr td div id toctitle Contents div ul li a href Log j Levels Order a li li a href Log j Set Log Level a li li a href Slf j Log Levels a li li a href Log j Threshold a li ul td tr tbody table p All relatedl Implemented Interfaces Serializable Direct Known p h id Log j Levels Order p Subclasses UtilLoggingLevel public class Levelextends Priorityimplements log j log levels Serializable DL Defines the minimum set of levels recognized by the p h id Log j Set
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Log Levels Debug Info Error table id toc tbody tr td div id toctitle Contents div ul li a href Log Levels Log j a li li a href Log j Log Levels a li li a href Logging Levels Java a li ul td tr tbody table p All Implemented Interfaces Serializable Direct relatedl Known Subclasses UtilLoggingLevel public class log level hierarchy Levelextends Priorityimplements Serializable DL Defines the minimum set p h id Log Levels Log j p of levels recognized by the system that is OFF FATAL ERROR p h id Log j Log Levels p WARN INFO
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Log j Level Value Error table id toc tbody tr td div id toctitle Contents div ul li a href Log j Log Level a li li a href Logger Levels Java a li li a href Log j Threshold a li ul td tr tbody table p All Implemented Interfaces Serializable relatedl Direct Known Subclasses UtilLoggingLevel public class log j levels order Levelextends Priorityimplements Serializable DL Defines the minimum set p h id Log j Log Level p of levels recognized by the system that is OFF FATAL ERROR org apache log j level jar WARN INFO code code
Log j Debug Info Warn Error Fatal table id toc tbody tr td div id toctitle Contents div ul li a href Log j Threshold a li li a href Logger Levels Java a li li a href Log j Logger a li ul td tr tbody table p Pooling DRCP IBM Systems Director raquo Log J Levels ALL relatedl TRACE DEBUG INFO WARN log j levels order ERROR FATAL OFF Jesse Hu Loggers may be p h id Log j Threshold p assigned levels The set of possible levels that is DEBUG INFO WARN ERROR and FATAL log j
Log j Error Warn table id toc tbody tr td div id toctitle Contents div ul li a href Org apache log j level Jar a li li a href Log j Set Log Level a li li a href Logging Levels Cisco a li li a href Slf j Log Levels a li ul td tr tbody table p All Implemented Interfaces Serializable Direct Known Subclasses UtilLoggingLevel public relatedl class Levelextends Priorityimplements Serializable DL Defines the minimum log j levels order set of levels recognized by the system that p h id Org apache log j level Jar p
Log j Logging Levels Error table id toc tbody tr td div id toctitle Contents div ul li a href Log j Log Level a li li a href Syslog Logging Levels a li li a href Log j Set Log Level a li ul td tr tbody table p All Implemented Interfaces Serializable Direct Known Subclasses UtilLoggingLevel relatedl public class Levelextends Priorityimplements Serializable DL Defines log j levels order the minimum set of levels recognized by the org apache log j level jar system that is OFF FATAL ERROR WARN INFO code code DEBUG and ALL The Level log
Log j Error Levels table id toc tbody tr td div id toctitle Contents div ul li a href Org apache log j level Jar a li li a href Slf j Log Levels a li li a href Logger Levels Java a li li a href Syslog Logging Levels a li ul td tr tbody table p All Implemented Interfaces Serializable Direct relatedl Known Subclasses UtilLoggingLevel public class log j levels order Levelextends Priorityimplements Serializable DL Defines the minimum set p h id Org apache log j level Jar p of levels recognized by the system that is OFF
Log j Info Error table id toc tbody tr td div id toctitle Contents div ul li a href Org apache log j level Jar a li li a href Log j Log Levels a li li a href Log j Set Log Level a li li a href Logger Levels Java a li ul td tr tbody table p log j - Configuration log j - Sample Program log j - Logging Methods log j - Logging relatedl Levels log j - Log Formatting log j - Logging log j levels order in Files log j - Logging in
Loglevel Error table id toc tbody tr td div id toctitle Contents div ul li a href Log Levels Java a li li a href Log j Set Log Level a li ul td tr tbody table p Log relatedl All Known Implementing Classes AvalonLogger Jdk LumberjackLogger log level hierarchy Jdk Logger Log JLogger LogKitLogger NoOpLog SimpleLog public interface Log log levels log j A simple logging interface abstracting logging APIs In order to be instantiated log j log levels successfully by LogFactory classes that implement this interface must have a constructor that takes a single String parameter representing slf
Loglevel At Error table id toc tbody tr td div id toctitle Contents div ul li a href Log Levels Log j a li li a href Logging Levels Java a li li a href Syslog Logging Levels a li li a href Log j Set Log Level a li ul td tr tbody table p here for a quick overview of the site Help Center Detailed answers to any relatedl questions you might have Meta Discuss the workings log level hierarchy and policies of this site About Us Learn more about Stack Overflow p h id Log Levels Log
Log j Error Info table id toc tbody tr td div id toctitle Contents div ul li a href Log j Levels Order a li li a href Log j Set Log Level a li li a href Syslog Logging Levels a li li a href Log j Logging a li ul td tr tbody table p All Implemented Interfaces Serializable Direct Known Subclasses UtilLoggingLevel relatedl public class Levelextends Priorityimplements Serializable DL Defines p h id Log j Levels Order p the minimum set of levels recognized by the log j log levels system that is OFF FATAL ERROR WARN
Log j Trace Debug Info Warn Error table id toc tbody tr td div id toctitle Contents div ul li a href Log j Log Level a li li a href Log Level Trace Vs Debug a li li a href Slf j Log Levels a li li a href Log j Threshold a li ul td tr tbody table p All Implemented Interfaces Serializable Direct Known Subclasses UtilLoggingLevel relatedl public class Levelextends Priorityimplements Serializable DL Defines log j levels order the minimum set of levels recognized by the system p h id Log j Log Level p that is
Log j Fatal Error table id toc tbody tr td div id toctitle Contents div ul li a href Log j Levels Order a li li a href Log Levels Log j a li li a href Slf j Log Levels a li li a href Log j Logging a li ul td tr tbody table p All relatedl Implemented Interfaces Serializable Direct Known p h id Log j Levels Order p Subclasses UtilLoggingLevel public class Levelextends Priorityimplements Serializable DL org apache log j level jar Defines the minimum set of levels recognized by the system p h id Log
Log j Error Level table id toc tbody tr td div id toctitle Contents div ul li a href Log j Log Levels a li li a href Org apache log j level Jar a li li a href Logger Levels Java a li ul td tr tbody table p All Implemented Interfaces Serializable Direct Known Subclasses UtilLoggingLevel public relatedl class Levelextends Priorityimplements Serializable DL Defines the minimum log j levels order set of levels recognized by the system that p h id Log j Log Levels p is OFF FATAL ERROR WARN INFO code code DEBUG and ALL The