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SiftingAppender & Variable modification...
by José Juan Montiel 03 May '10

03 May '10

Hi!, i'm using [1] to separe logs in diferent files with ${userId}... My question is? Can I do something like <File>/tmp/${userId}.substring(0,4)/${userId}.log</File> Thanks. [1] http://logback.qos.ch/manual/appenders.html#SiftingAppender -- Jose Juan Montiel Martinez Eurobits Technologies Calle Musgo 3, 1ª Planta 28023 Madrid T +34-917080300 F +34-913077480 josejuan.montiel(a)eurobits.es http://www.eurobits.com

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Configuring SiftingAppender
by Luciano Molinari 03 May '10

03 May '10

Hi guys, I read the SiftingAppender's documentation and saw the following line: "... Appenders unused for 30 minutes will be automatically closed and discarded. ..." My question is if i can confiugure this time? I want to use SiftingAppender to create one file per "request", but one request can take some minutes to get finished and the whole system writes stuff about one particular request. It's such a trace log. As I can have lots of requests, i'm afraid of get a TooManyOpenFiles IOException during this 30 minutes interval. Does this fear proceed? Thanks and sorry for the english. -- Luciano Davoglio Molinari

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Log separation
by Dhondt, Edwin 29 Apr '10

29 Apr '10

I've got 4 web applications. They all have some specific code containing log statements but they also include a common "backend" codebase jar. Code in that common codebase also contains log statements. I want each of those 4 applications to have their own log file. That is, I want all log messages for webapp 1 to appear in webapp 1's log file, messages for webapp2 in webapp 2's file and so on. This is not a problem for the log statements appearing in the code specific to each webapp. But what about log statements in de common "backend" codebase (included by each of the webapps) ? How do those log statements "know" when log statements should go to webapp 1's logfile or webapp 2's log file ? Because that depends on where the calling thread initiated (in webapp1, 2, ...). I could augment each of my backend method signatures with a extra context parameter, but I hope there are more transparent solutions ? User => methodA Webapp1 => backend codebase methodX => webapp1.log User => methodB Webapp2 => backend codebase method => webapp2.log ... Any advice would be welcome. Thanks, EDH

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Is there a Junit appender?
by Chris Helck 28 Apr '10

28 Apr '10

I want to unit test some objects and to check that the objects are logging certain messages under certain cirmcumstances. Is this possible? Is it easy? I am using slf4j. When I run the unit tests I use the NOP logger, in production we use logback. I want something like: Logger logger = LoggerFactory.getLogger(MyStuff.class); logger.info( "Hello World"); assertTrue( logger.wasLoggedAsInfo( "Hello World")); Thanks, C. Helck ********************************************************************** This communication and all information (including, but not limited to, market prices/levels and data) contained therein (the "Information") is for informational purposes only, is confidential, may be legally privileged and is the intellectual property of ICAP plc and its affiliates ("ICAP") or third parties. No confidentiality or privilege is waived or lost by any mistransmission. The Information is not, and should not be construed as, an offer, bid or solicitation in relation to any financial instrument or as an official confirmation of any transaction. The Information is not warranted, including, but not limited, as to completeness, timeliness or accuracy and is subject to change without notice. ICAP assumes no liability for use or misuse of the Information. All representations and warranties are expressly disclaimed. The Information does not necessarily reflect the views of ICAP. Access to the Information by anyone else other than the recipient is unauthorized and any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it is prohibited. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. **********************************************************************

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logback, slf4j, frameworks, ...
by Dhondt, Edwin 28 Apr '10

28 Apr '10

I've got an application that, like many applications, uses spring, hibernate, and so on. I guess those frameworks don't use slf4j and/or logback under the hoods. What are my options if I want to start using slf4J and logback in my web application given the above and the fact that I'll also have to use SizeAndTimeBasedFNATP appenders with file compression (gzip/zip) ? Thanks, Edwin

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Release of SLF4J version 1.6.0-alpha2
by Ceki Gülcü 27 Apr '10

27 Apr '10

Hello all, I am happy to announce the immediate availability of SLF4J version 1.6.0-alpha2, which is still experimental, consisting of several important enhancements and bug fixes. In the 1.6.x series, in the absence of an SLF4J binding, slf4j-api will default to a no-operation implementation discarding all log requests. Thus, instead of throwing an exception, SLF4J will emit a single warning message about the absence of a binding and proceed to discard all log requests without further protest. Please refer to the the news page for precise details. http://www.slf4j.org/news.html You can download SLF4J, including full source code, class files and documentation on our download page, shown below. http://www.slf4j.org/download.html You can receive SLF4J related announcements by subscribing to the SLF4J announce mailing list. To subscribe to QOS.ch announce list, please visit the following URL. http://qos.ch/mailman/listinfo/announce -- Ceki Gülcü Logback: The reliable, fast and flexible logging framework for Java. http://logback.qos.ch

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Logback and tomcat
by Daniel Proud 23 Apr '10

23 Apr '10

Hi guys, I am attempting to get logback working with my tomcat webapp and have run into a few issues. I have got various log messages in my client code and they seem to work when run seperate from the web app (eg junit testing in eclipse uses the default configuration and the log messages appear in the console.) When I run this code embedded in a webapp on my local tomcat5.5 install (from within eclipse again) I can see logback internal messages in the eclipse console view: 23/04/2010 10:15:19 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.6.0_16\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files (x86)\CollabNet Subversion Client;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;c:\Program Files (x86)\Microsoft SQL Server\90\Tools\binn\;C:\msys\1.0\bin;C:\mingw\bin;C:\cygwin\bin;C:\Program Files (x86)\TortoiseHg;C:\Program Files (x86)\Mercurial\;C:\Program Files (x86)\CVSNT\ 23/04/2010 10:15:19 AM org.apache.coyote.http11.Http11BaseProtocol init INFO: Initializing Coyote HTTP/1.1 on http-8080 23/04/2010 10:15:19 AM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 484 ms 23/04/2010 10:15:20 AM org.apache.catalina.core.StandardService start INFO: Starting service Catalina 23/04/2010 10:15:20 AM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.5.28 23/04/2010 10:15:20 AM org.apache.catalina.core.StandardHost start INFO: XML validation disabled 23/04/2010 10:15:20 AM org.apache.catalina.loader.WebappClassLoader validateJarFile INFO: validateJarFile(E:\workspaces\default\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\web-keno\WEB-INF\lib\servlet-api-2.4.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class 10:15:20,578 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml] 10:15:20,578 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/E:/workspaces/default/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/web-keno/WEB-INF/classes/logback.xml] 10:15:20,625 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender] 10:15:20,625 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [FILE] 10:15:20,656 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Pushing component [rollingPolicy] on top of the object stack. 10:15:20,671 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used 10:15:20,671 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern E:/apache-tomcat-5.5.28/logs/keno.%d{yyyy-MM-dd}.log for the active file 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy@755c62bc - The date pattern is 'yyyy-MM-dd' from file name pattern 'E:/apache-tomcat-5.5.28/logs/keno.%d{yyyy-MM-dd}.log'. 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy@755c62bc - Roll-over at midnight. 10:15:20,687 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:12 - no applicable action for [encoder], current pattern is [[configuration][appender][encoder]] 10:15:20,687 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:13 - no applicable action for [pattern], current pattern is [[configuration][appender][encoder][pattern]] 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - Active log file name: E:/apache-tomcat-5.5.28/logs/keno.2010-04-23.log 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - File property is set to [null] 10:15:20,687 |-ERROR in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - No layout set for the appender named "FILE". 10:15:20,687 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Popping appender named [FILE] from the object stack 10:15:20,687 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to ALL 10:15:20,687 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [FILE] to Logger[ROOT] 10:15:20,687 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 10:15:20,578 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml] 10:15:20,578 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/E:/workspaces/default/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/web-keno/WEB-INF/classes/logback.xml] 10:15:20,625 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender] 10:15:20,625 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [FILE] 10:15:20,656 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Pushing component [rollingPolicy] on top of the object stack. 10:15:20,671 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used 10:15:20,671 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern E:/apache-tomcat-5.5.28/logs/keno.%d{yyyy-MM-dd}.log for the active file 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy@755c62bc - The date pattern is 'yyyy-MM-dd' from file name pattern 'E:/apache-tomcat-5.5.28/logs/keno.%d{yyyy-MM-dd}.log'. 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy@755c62bc - Roll-over at midnight. 10:15:20,687 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:12 - no applicable action for [encoder], current pattern is [[configuration][appender][encoder]] 10:15:20,687 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:13 - no applicable action for [pattern], current pattern is [[configuration][appender][encoder][pattern]] 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - Active log file name: E:/apache-tomcat-5.5.28/logs/keno.2010-04-23.log 10:15:20,687 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - File property is set to [null] 10:15:20,687 |-ERROR in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - No layout set for the appender named "FILE". 10:15:20,687 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Popping appender named [FILE] from the object stack 10:15:20,687 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to ALL 10:15:20,687 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [FILE] to Logger[ROOT] 10:15:20,687 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 23/04/2010 10:15:20 AM org.apache.axis.utils.JavaUtils isAttachmentSupported WARNING: Unable to find required classes (javax.activation.DataHandler and javax.mail.internet.MimeMultipart). Attachment support is disabled. 23/04/2010 10:15:21 AM org.apache.coyote.http11.Http11BaseProtocol start INFO: Starting Coyote HTTP/1.1 on http-8080 23/04/2010 10:15:21 AM org.apache.jk.common.ChannelSocket init INFO: JK: ajp13 listening on /0.0.0.0:8009 23/04/2010 10:15:21 AM org.apache.jk.server.JkMain start INFO: Jk running ID=0 time=0/47 config=null 23/04/2010 10:15:21 AM org.apache.catalina.storeconfig.StoreLoader load INFO: Find registry server-registry.xml at classpath resource 23/04/2010 10:15:21 AM org.apache.catalina.startup.Catalina start INFO: Server startup in 1375 ms The config does not appear twice when I turn off the debug option in the below logback.xml: <?xml version="1.0" encoding="UTF-8"?> <configuration debug="true"> <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>${catalina.home}/logs/keno.%d{yyyy-MM-dd}.log</FileNamePattern> <MaxHistory>30</MaxHistory> </rollingPolicy> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <root level="all"> <appender-ref ref="FILE" /> </root> </configuration> However nothing seems to get logged. It creates the log file however it remains at 0 bytes. I tried using a console appender and had the same problem - the log messages did not appear on the console. When I try to run the above app on a ubuntu9/tomcat6 production-like environment, I get the same issue (no log messages) except I can't find the console output at all. I have a feeling that is a tomcat config issue though - I can't find catalina.out anywhere. Any ideas what might be causing the log messages to disappear? Cheers, Dan -- *Daniel Proud* Analyst Programmer ------------------------------------------------------------------------ Tel: (02) 6245 6267 Fax: (02) 6245 6242 Mob: 0417 291 323 Email: danielp(a)acttab.com.au <mailto:danielp@acttab.com.au> Web: http://www.acttab.com.au ACTTAB <http://www.acttab.com.au> ------------------------------------------------------------------------ The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. Any review, retransmission, interference with, copying or other use of, or taking of any action in reliance on this information by persons other than the intended recipient is prohibited. If you have received this information in error, please contact the sender immediately and delete the material from your computer. It is the recipient’s responsibility to check this message and any attachments for viruses.

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Can I prevent logback's DBAppender from logging specific properties?
by Chris Pruett 15 Apr '10

15 Apr '10

Logback's DBAppender logs all properties in its context and MDC to the database. I would like to control which properties are logged, specifically filtering out certain values, but I can't find any options to do so. The documentation is terse: > The logging_event_property is used to store the keys and values contained in the MDC or the Context Is it possible to exclude certain properties from being logged? Here is an example: Logback is configured with a `DBAppender` that loads its properties from `vct.properties`: <configuration> <property resource="vct.properties" /> <appender name="DB" class="ch.qos.logback.classic.db.DBAppender"> <connectionSource class="ch.qos.logback.core.db.DataSourceConnectionSource"> <dataSource class="com.mchange.v2.c3p0.ComboPooledDataSource"> <driverClass>com.mysql.jdbc.Driver</driverClass> <jdbcUrl>jdbc:mysql://${log.db.host}:${log.db.port}/${log.db.schema}</jdbcUrl> <user>${log.db.username}</user> <password>${log.db.password}</password> </dataSource> </connectionSource> </appender> <root level="DEBUG"> <appender-ref ref="DB" /> </root> </configuration> `vct.properties` has the connection settings: log.db.host=localhost log.db.port=3306 log.db.schema=logs_development log.db.username=loguser log.db.password=logpass When an event is logged, all of the connection settings are logged: mysql> select * from logging_event_property where event_id=1; +----------+---------------------+-------------------------------------------+ | event_id | mapped_key | mapped_value | +----------+---------------------+-------------------------------------------+ | 1 | log.db.host | localhost | | 1 | log.db.password | logpass | | 1 | log.db.port | 3306 | | 1 | log.db.schema | logs_development | | 1 | log.db.username | loguser | +----------+---------------------+-------------------------------------------+

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Creating a New File Appender for Each HTTP Request
by Albert Bupp 12 Apr '10

12 Apr '10

Greetings, I have a servlet app which responds to HTTP requests. Each request initiates (sometimes lengthy) processing that I would like to log to its own uniquely named log file. This request log file should be separate from the servlet's log file so that request-based log statements aren't interleaved w/ each other making them hard to follow. What approach should I use for this? I am relatively new to Logback. I have used programmatically instantiated appenders in log4j to do this in the past. For Logback, I have created separate configuration files for the servlet and request log, and tried invoking a reset of the context and doConfigure() on the Joran Configurator once when the servlet initiates, and then again processing each request (based on a to-the-millisecond date pattern). Doing this causes the servlet's log messages to go into the request log. Clearly I'm doing something wrong. ere are the configuration files that I'm using, the first for the servlet, the second for the request logging. Perhaps these need to be combined into one file? If so, how can I get a separate log file for each request as its processed?  <?xml version="1.0" encoding="UTF-8"?> <configuration scan="true" scanPeriod="30 seconds"> <appender name="CostingServlet" class="ch.qos.logback.core.rolling.RollingFileAppender">  <File>\\host\app\logs\costingservlet.log</File> <layout class="ch.qos.logback.classic.PatternLayout"> <Pattern>%-17d{yyyy-MMM-dd HH:mm} %-6r [%t] %-6p %c{3} - %m%n</Pattern> </layout> <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy"> <maxIndex>10</maxIndex> <FileNamePattern>\\host\app\logs\costingservlet.log.%i</FileNamePattern> </rollingPolicy> <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <MaxFileSize>2MB</MaxFileSize> </triggeringPolicy> </appender> <logger name="com.bearlogic.servlets" level="DEBUG"/> <root level="debug"> <appender-ref ref="CostingServlet"/> </root> </configuration>  <?xml version="1.0" encoding="UTF-8"?> <configuration scan="true" scanPeriod="30 seconds"> <timestamp key="byMilliSecond" datePattern="yyyyMMMdd'T'HHmmssSSSS" /> <appender name="FILE" class="ch.qos.logback.core.FileAppender"> <File>\\host\app\logs\reqlog-${byMilliSecond}.log</File> <layout> <Pattern>%-17d{yyyy-MMM-dd HH:mm} %-6r [%t] %-6p %c{3} - %m%n</Pattern> </layout> </appender> <logger name="com.bearlogic.rc" level="DEBUG" /> <root level="debug"> <appender-ref ref="FILE" /> </root> </configuration> I've read the manual, browsed through FAQ and searched the user archives for an answer to this w/o understanding what I should be doing. I can't be the first to want to do something like this. Perhaps I need to use a filter of some sort? Any hints or pointers on this would be greatly appreciated. Thanks in advance, -Albert

2 1

Time and Size-based rolling policy not working
by Tyler Kocheran 08 Apr '10

08 Apr '10

I have created a test project to see if I can use logback's size and time-based rolling policy to roll over to log files as logs get large and as time passes. However, I cannot get it to roll over. It instead always logs to the file I've specified in the <file> tag. I have attached my project's full, ant-buildable source code to show my code and to possibly help get the ball rolling on figuring all of this out. Can anyone help me get time/size based file rolling working? http://old.nabble.com/file/p28171419/logback.zip (This is the Java project)

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