January 2013 - logback-user

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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(Important) Dynamically change the scan period
by Yihya Hugirat 08 Apr '13

08 Apr '13

hi all, i have migrated to logback to be able to change the log levels dynamically. i'm testing it now with calssfish 3.01 and somehow it is not working when i change the levels in logback.xml there nothing happens. by deploying from netbeans i get the following: |-INFO in ch.qos.logback.classic.turbo.ReconfigureOnChangeFilter@11bfee0 - Will scan for changes in [[C:\Dokumente und Einstellungen\user_Home\Eigene Dateien\NetBeansProjects\WS-LDAP\build\web\WEB-INF\classes\logback.xml]] every 15 seconds. but when i change the levels in this file nothing happens Any help will be appreciated Hugirat -- إِنَّ الَّذِينَ يُحِبُّونَ أَنْ تَشِيعَ الْفَاحِشَةُ فِي الَّذِينَ آمَنُوا لَهُمْ عَذَابٌ أَلِيمٌ فِي الدُّنْيَا وَالآخِرَةِ وَاللَّهُ يَعْلَمُ وَأَنْتُمْ لا تَعْلَمُونَ My public key please use it when you contact me: هذا مفتاحي العام الرجاء أستخدامه عند الإتصال بي: 09BA B710 4B98 ECDA 8C0A 6CB1 2E1E CF88 6A12 F2C3

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programmatic configuration to log to file
by Steve Prior 07 Feb '13

07 Feb '13

Based on some examples I cobbled together the following code to programmatically configure logback to write its output to a file (I don't like having config files around), but the output still goes to stdout in addition to the file. Can anyone give me a clue how I can only have the output go to the specific file and not stdout? Thanks Steve LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory(); FileAppender<ILoggingEvent> fileAppender = new FileAppender<ILoggingEvent>(); fileAppender.setContext(loggerContext); fileAppender.setFile(ConcurrencyExample.class.getSimpleName() + ".log"); PatternLayout pl = new PatternLayout(); pl.setPattern("%d %5p %t [%c:%L] %m%n)"); pl.setContext(loggerContext); pl.start(); fileAppender.setLayout(pl); fileAppender.start(); // attach the rolling file appender to the logger of your choice Logger logbackLogger = loggerContext.getLogger(ConcurrencyExample.class); logbackLogger.addAppender(fileAppender); // OPTIONAL: print logback internal status messages StatusPrinter.print(loggerContext); // log something logbackLogger.info("hello");

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how configure OSGi-over-slf4j ?
by Cristiano Gavião 07 Feb '13

07 Feb '13

Hi, I would like to try OSGi-over-slf4j. I have installed it into an equinox product, set a low start level to it. but couldn't see any result. could someone point me to any example of its use? thanks Cristiano

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Externalized Logback configuration for web applications
by Perryn Fowler 01 Feb '13

01 Feb '13

Hello, I have a logging use case that I would think was relatively common, but that does not seem to be supported particularly well by logback. I wanted to see what the logback community thinks/advises. The details of the use case - I am writing java web apps to be deployed to JEE web containers. - I want the logging config to be external to the wars, so that I can use the same wars in different environments, but configure logging differently. - I want to be able to deploy several different wars to the same web container and have them use different logging configurations. The logback documentation seems to push towards either packaging the logback config in the wars, or sharing an external logging config between them. (Whereas I want separate external logging configuration for each war) I hope that makes sense. The JNDI support described here: http://logback.qos.ch/manual/loggingSeparation.html looks like it might be of use, but it does seem to require that the config files are placed in WEB-INF/classes and I would prefer they are completely external to the war. I have found a number of people who have coded up their own solutions, notably: http://blog.iprofs.nl/tag/logback/ and https://bowerstudios.com/node/896 That doesn't look too bad, but wondering what the community thinks of these approaches -- ----------------------- Perryn Fowler

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turn off stack traces in one appender, leave them on in another
by Steve Cohen 30 Jan '13

30 Jan '13

Given a configuration with two appenders, one file based and the other network-based, I would like to be able to code log statements with a throwable parameter in which the file-based one would append the stack-trace information contained in the throwable, but the network-based appender would not. The network-based appender is home-brewed, descending from JMSAppenderBase. Is there a hook in the appender hierarchy that would allow it to turn off appending of the stack trace for that appender while letting other appenders print the stack trace? Thanks.

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How to determine if the Logback Framemwork is properly configured?
by Brett Walker 12 Jan '13

12 Jan '13

Hi, I have a need to determine programmatically if the Logback Framework if properly configured. I'm aware that if Logback encounters an error during configuration that it prints status messages to the console. I'm writing a standalone GUI application that won't have a console. Also the targeted audience will not be familiar with logs Before the application can proceed past initialization; I need to be assured, programmatically, that the logging framework is properly configured; i.e. that log messages are being written to the log file and no other errors have been occurred. Do I have to scan the status messages for message of WARN and ERROR level or is there some simpler means of determining the configuration status of the Logback framework. Brett

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Access Properties Defined in Logback programmatically
by Charlie Hubbard 11 Jan '13

11 Jan '13

I have an administration console I'm building, and I want to display the logs created in Logback for my application. However, where those logs are stored is different per environment. I have several property files that define where the logs are stored: <configuration> <property resource='log.properties'/> <property resource='log.${ENV:-prod}.properties'/> <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${log.dir}/sync.log</file> ...</configuration> I'd like to find the value of ${log.dir} from Logback's Java API. I'd tried the following, but it doesn't have any of the properties defined in the resources. For example: LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory(); String logDir = loggerContext.getProperty("log.dir"); // this always returns null So my question is what API calls should I be using? Thanks Charlie If you'd rather have the stackoverflow karma I originally posted this there: http://stackoverflow.com/questions/14271253/access-properties-defined-in-lo…

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