August 2013 - logback-user - mailman3.qos.ch

Re: [logback-user] Logback suddenly stopped logging
by Andreas Dejung 19 Jun '14

19 Jun '14

I had the same problem and I think I know why J Solaris does interrupt IO blocked thread which then causes the OutputStreamAppender to catch the IOException in line 218 (version 0.9.24). I actually run version 0.9.18 but this part has not change so I guess it will behave the same way. If we look at http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4385444 InterruptedIOException should not be required by platform specification (sol) And log4j https://issues.apache.org/bugzilla/show_bug.cgi?id=44157 InterruptedIOException ignored by log4j I think it should be solved the same why } catch (InterruptedIOException iioe){ //give the thread a changes to act on interruption and then carry on Thread.currentThread().interrupt(); } catch (IOException ioe) { // as soon as an exception occurs, move to non-started state // and add a single ErrorStatus to the SM. this.started = false; addStatus(new ErrorStatus("IO failure in appender", this, ioe)); } I could not find the jira entry mentioned in this thread therefore I write it here J BTY the jvm option -XX:-UseVMInterruptibleIO does prevent the interruption by solaris but that's only a workaround and not solving the problem ;) Cheers Andy

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Re: [logback-user] Add header-lines to each log file
by Schoeftner, Thomas 20 May '14

20 May '14

Sorry to bump this topic again. Any ideas? Thanks, -Tom

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Replacing Tomcat7 Logging with Logback?
by James Carr 17 Sep '13

17 Sep '13

Hi All, Is there a good tutorial or documentation on replacing Tomcat's default logging with logback? So far my searches turn up http://logback.qos.ch/access.html which only seems to work with access logs, not the actual server logging itself. Thanks, James

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Level management on Logback
by gaston sponer 29 Aug '13

29 Aug '13

Hi, I have a doubt. If on my config file (xml) I set logger level as "Debug" and then from my java class i do: logger.error("some message Log {}", this); What wold be the result on my log file? Does Logback a comparation between logger level and event level and depend on that it does the logging?Do i have a log based on debug or based on error? Thanks. Gastón

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new logback appender,faster
by champion 25 Aug '13

25 Aug '13

Hello,I have writen three append to improve logback, and tested them with log4j2 performance test. http://logging.apache.org/log4j/2.0/manual/async.html#Performance The result is Ranking: 1. Logback: Async disruptor Appender (single thread): throughput: 9,993,043 ops/sec. latency(ns): avg=3532.4 99% < 19660.8 99.99% < 16829644.8 (285431 samples) 2. Logback: Async jactor2 Appender (single thread): throughput: 9,001,575 ops/sec. latency(ns): avg=1210.0 99% < 2048.0 99.99% < 65536.0 (21476524 samples) 3. Logback: Async jactor Appender (single thread): throughput: 8,482,989 ops/sec. latency(ns): avg=1201.4 99% < 2048.0 99.99% < 65536.0 (22639435 samples) 4. Log4j2: Loggers all async (single thread): throughput: 8,394,794 ops/sec. latency(ns): avg=8631.6 99% < 13107.2 99.99% < 26869760.0 (610686 samples) 5. Log4j2: Async Appender (single thread): throughput: 7,408,055 ops/sec. latency(ns): avg=864.6 99% < 4096.0 99.99% < 131072.0 (478795 samples) 6. Logback: Async disruptor Appender (2 threads): throughput: 4,103,790 ops/sec. latency(ns): avg=884.1 99% < 4505.6 99.99% < 65536.0 (4500675 samples) 7. Log4j2: Async Appender (2 threads): throughput: 3,829,409 ops/sec. latency(ns): avg=685.1 99% < 4096.0 99.99% < 65536.0 (2034956 samples) 8. Log4j2: Async Appender (4 threads): throughput: 2,658,120 ops/sec. latency(ns): avg=607.9 99% < 2048.0 99.99% < 239206.4 (19951913 samples) 9. Log4j2: Loggers all Sync (4 threads): throughput: 2,480,657 ops/sec. latency(ns): avg=4324.3 99% < 7372.8 99.99% < 13841203.2 (6575838 samples) 10. Log4j2: Loggers all Sync (2 threads): throughput: 2,430,352 ops/sec. latency(ns): avg=651.3 99% < 2457.6 99.99% < 65536.0 (8625233 samples) 11. Logback: Async disruptor Appender (4 threads): throughput: 2,301,079 ops/sec. latency(ns): avg=7799.6 99% < 4300.8 99.99% < 24169676.8 (7478483 samples) 12. Logback: Async jactor2 Appender (2 threads): throughput: 1,739,406 ops/sec. latency(ns): avg=931.2 99% < 2048.0 99.99% < 42598.4 (48717475 samples) 13. Logback: Async jactor Appender (2 threads): throughput: 1,486,585 ops/sec. latency(ns): avg=930.7 99% < 2048.0 99.99% < 36044.8 (49685633 samples) 14. Logback: Async jactor2 Appender (4 threads): throughput: 1,340,977 ops/sec. latency(ns): avg=1253.6 99% < 1587.2 99.99% < 80281.6 (87902519 samples) 15. Logback: Async jactor Appender (4 threads): throughput: 1,159,258 ops/sec. latency(ns): avg=1020.1 99% < 1587.2 99.99% < 77004.8 (99564074 samples) my code is at https://github.com/cp149/jactor-logger hope it is useful champion

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Use of DefaultThrowableRenderer
by gaston sponer 22 Aug '13

22 Aug '13

Hi guys, I have some doubts about implementing methods from DefaultThrowableRenderer. Can you please give me some basic example to figure out how render() or printFirstLine() method it works?I can't find any example. What advantages I have using render(StringBuilder sbuf, ILoggingEvent event) ? Can i use this render method on a Layout different from HTMLayout ? Thanks

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SiftingAppender lose dynamic configuration in Web application in EAR
by Béziat 22 Aug '13

22 Aug '13

Hello, For a project I am using a SiftingAppender on top of a RollingFileAppender defined in a logback.xml. <appender name="SIFT" class="ch.qos.logback.classic.sift.SiftingAppender"> <discriminator class="ch.qos.logback.classic.sift.JNDIBasedContextDiscriminator"> ... </discriminator> <sift> <appender name="FILE-${contextName}" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>logs/${contextName}.log</file> ... The logback configuration is shared in an EAR for multiple web applications. I update the RollingFileAppender file value at deployment in a ServletContextListener, replacing the ${contextName} with the context-root of the application being deployed. For instance, Web Application MyWebApp1, configured to log to logs/mywebapp1.log is deployed to /ContextA/MyWebApp1. So Iupdate logs/mywebapp1.log to logs/contexta_mywebapp1.log. It should be just the ServletContextListener logging to the initial file. My issue is that it occurs that the application /ContextA/MyWebApp1 switch back to logs/mywebapp1.log. It seems the programmatic configuration I did at deployment is lost. My question is, finally :), is there a way for logback to detect configuration loss and launch programmatic reconfiguration ? Thanks, David

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Logger level from Layout class
by gaston sponer 22 Aug '13

22 Aug '13

Hi, Is there any way to get from MyLayout the logger level? I don't want to do this: package com.render;import org.slf4j.LoggerFactory;import ch.qos.logback.classic.Logger;import ch.qos.logback.classic.spi.ILoggingEvent;import ch.qos.logback.core.LayoutBase; import com.render.domain.Employee; public class MyLayout extends LayoutBase<ILoggingEvent>{ String level= ((Logger)LoggerFactory.getLogger("employee")).getLevel().toString();...... This works well but i don't like to instantiate an object just to get a logger level. This is my xml config file: <configuration><logger name="employee" level="debug"/> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder"> <layout class="com.render.MyLayout" > </layout> </encoder> </appender> <root level="off"> <appender-ref ref="CONSOLE" /> </root></configuration> Thanks,Gastón.

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DuplicateMessageFilter not using params
by Dave Brosius 22 Aug '13

22 Aug '13

Greetings, I want to use the DuplicateMessageFilter but realized that it only works on the format string, and not the complete message. I want to catch the pathological case where something is truly getting logged over and over again and is the same thing which is really probably an undiscovered bug in the code. Is there any such beast available? I realize that one could create their own RealDuplicateMessageFilter and do the appending there, but that just throws away the appending, and it would need to be redone when you actually go to log, which kind of stinks. Any ideas here? thanks! dave

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DBAppender and markers
by Leonardo Souza 21 Aug '13

21 Aug '13

Hi, We have a system with a lot of log statements using markers, this.logger.info(this.marker, "ex fvmo dare lvcem"); We are planning to store the logs in a database using DBAppender but ther marker do not have a column, only appears in the formatted_message field. We will query this database filtering by the markers, a sql like query is not a desirable solution. Anyone has a better idea instead of creating a custom appender? thanks .. -- Leonardo S Souza

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