<div dir="ltr">This is not an issue with slf4j. I am hitting the below issue with dropwizard and logback. <div><br></div><div><a href="https://github.com/dropwizard/dropwizard/issues/1367">https://github.com/dropwizard/dropwizard/issues/1367</a><br></div><div><br></div><div>It seems this has been fixed in 1.2.0 as explained <a href="https://github.com/dropwizard/dropwizard/pull/1900">here</a>. </div><div><br></div><div>Once I manage to upgrade dropwizard to 1.2.0. I will post my finding here again. </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jan 16, 2018 at 3:24 PM, Ceki <span dir="ltr"><<a href="mailto:ceki@qos.ch" target="_blank">ceki@qos.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">If you are going to update, go for the latest.<span class=""><br>
<br>
On 16.01.2018 05:13, Debraj Manna wrote:<br>
</span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">
Thanks Ceki.<br>
<br>
Ok I am using slf4j-api 1.7.5. Even after initialization I am not seeing the logging events being logged while using that logger. I will update to the slf4j 1.7.15 and post back with the results.<br>
<br></span><span class="">
On Tue, Jan 16, 2018 at 2:51 AM, Ceki <<a href="mailto:ceki@qos.ch" target="_blank">ceki@qos.ch</a> <mailto:<a href="mailto:ceki@qos.ch" target="_blank">ceki@qos.ch</a>>> wrote:<br>
<br>
<br>
As of SLF4J 1.7.15, slf4j-api stores and replays events that were<br>
created during the initialization phase. In previous versions, these<br>
events were lost. However, logging events occurring after<br>
initialization should work fine in all versions.<br>
<br>
I suggest upgrading slf4j-api to 1.7.25.<br>
<br>
On 15.01.2018 20:14, Debraj Manna wrote:<br>
<br>
<br>
---------- Forwarded message ----------<br>
From: *Debraj Manna* <<a href="mailto:subharaj.manna@gmail.com" target="_blank">subharaj.manna@gmail.com</a><br>
<mailto:<a href="mailto:subharaj.manna@gmail.com" target="_blank">subharaj.manna@gmail.c<wbr>om</a>><br></span><span class="">
<mailto:<a href="mailto:subharaj.manna@gmail.com" target="_blank">subharaj.manna@gmail.c<wbr>om</a> <mailto:<a href="mailto:subharaj.manna@gmail.com" target="_blank">subharaj.manna@gmail.c<wbr>om</a>>>><br>
Date: Tue, Jan 16, 2018 at 12:30 AM<br>
Subject: SLF4J Warning - Loggers will not work as they were<br>
created during initialization phase<br>
To: <a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a> <mailto:<a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a>><br></span><div><div class="h5">
<mailto:<a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a> <mailto:<a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a>>><br>
<br>
<br>
Cross-posting from stackoverflow<br>
<<a href="https://stackoverflow.com/questions/48268724/slf4j-warning-loggers-will-not-work-as-they-were-created-during-initialization" rel="noreferrer" target="_blank">https://stackoverflow.com/que<wbr>stions/48268724/slf4j-warning-<wbr>loggers-will-not-work-as-they-<wbr>were-created-during-initializa<wbr>tion</a><br>
<<a href="https://stackoverflow.com/questions/48268724/slf4j-warning-loggers-will-not-work-as-they-were-created-during-initialization" rel="noreferrer" target="_blank">https://stackoverflow.com/que<wbr>stions/48268724/slf4j-warning-<wbr>loggers-will-not-work-as-they-<wbr>were-created-during-initializa<wbr>tion</a>>><br>
<br>
I am using slf4j with logback in a dropwizard application.<br>
During the application initialization I am seeing logs like below<br>
<br>
|SLF4J:Thefollowing loggers will not work because they were<br>
created SLF4J:during the defaultconfiguration phase of the<br>
underlying logging system.SLF4J:Seealso<br>
<a href="http://www.slf4j.org/codes.html#substituteLogger" rel="noreferrer" target="_blank">http://www.slf4j.org/codes.htm<wbr>l#substituteLogger</a><br>
<<a href="http://www.slf4j.org/codes.html#substituteLogger" rel="noreferrer" target="_blank">http://www.slf4j.org/codes.ht<wbr>ml#substituteLogger</a>><br>
<<a href="http://www.slf4j.org/codes.html#substituteLogger" rel="noreferrer" target="_blank">http://www.slf4j.org/codes.ht<wbr>ml#substituteLogger</a><br>
<<a href="http://www.slf4j.org/codes.html#substituteLogger" rel="noreferrer" target="_blank">http://www.slf4j.org/codes.ht<wbr>ml#substituteLogger</a>>>SLF4J:com<wbr>.vnera.healthandmetrics.VneraM<wbr>etrics|<br>
<br>
I am using |logback.xml| with my dropwizard application. My code<br>
flow looks like below<br>
<br>
|publicclassVneraMetrics{priva<wbr>testaticfinalLoggerlogger<br>
=LoggerFactory.getLogger(Vnera<wbr>Metrics.class);...// This method<br>
is getting called from Service.run() during the dropwizard<br>
application initializationpublicStringgetS<wbr>omeValue(){// logger<br>
is not accessed from this functionreturn"Some initialized<br>
value";}}publicclassServiceext<wbr>endsApplication<Conf>{publicst<wbr>aticfinalLoggerlogger<br>
=LoggerFactory.getLogger(Servi<wbr>ce.class);publicstaticvoidmain<wbr>(Stringargs[]){<a href="http://logger.info" rel="noreferrer" target="_blank">logger.info</a><br></div></div>
<<a href="http://logger.info" rel="noreferrer" target="_blank">http://logger.info</a>>("Some logs");Serviceservice<div><div class="h5"><br>
=newService();service.run(drop<wbr>WizardArgs);Utils.reloadLogger<wbr>();}}|<br>
<br>
|Utils.reloadLogger()| is loading the loggback configuration as<br>
discussed here<br>
<br>
|publicstaticvoidreloadLogger(<wbr>){StringloggingConfig<br>
=System.getProperty("logback.c<wbr>onfigurationFile");if(loggingC<wbr>onfig ==null){System.out.println("Lo<wbr>gging<br>
Config is null");}LoggerContextloggerCon<wbr>text<br>
=(LoggerContext)LoggerFactory.<wbr>getILoggerFactory();loggerCont<wbr>ext.reset();JoranConfiguratorc<wbr>onfigurator<br>
=newJoranConfigurator();try{In<wbr>putStreamconfigStream<br>
=FileUtils.openInputStream(new<wbr>File(loggingConfig));configura<wbr>tor.setContext(loggerContext);<wbr>configurator.doConfigure(<wbr>configStream);//<br>
loads logback<br>
fileconfigStream.close();Syste<wbr>m.out.println("Loaded<br>
configuration<br>
file");}catch(JoranException|I<wbr>OExceptione){e.printStackTrace<wbr>();System.out.println("Failed<br>
to log configuration file");System.exit(1);}}}|<br>
<br>
*Versions*<br>
<br>
* Logback - 1.2.3<br>
* Dropwizard - 1.0.2<br>
<br>
Can some one let me know what does the SLF4J warning denotes? I<br>
have seen the substituteLogger<br>
<<a href="http://www.slf4j.org/codes.html#substituteLogger" rel="noreferrer" target="_blank">http://www.slf4j.org/codes.ht<wbr>ml#substituteLogger</a><br>
<<a href="http://www.slf4j.org/codes.html#substituteLogger" rel="noreferrer" target="_blank">http://www.slf4j.org/codes.ht<wbr>ml#substituteLogger</a>>> page but<br>
this does not mention how can I get around this? On trying to<br>
use logger in |VneraMetrics| it is not printing anything.<br>
<br>
<br>
<br>
<br>
______________________________<wbr>_________________<br>
slf4j-user mailing list<br></div></div>
<a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a> <mailto:<a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a>><br>
<a href="http://mailman.qos.ch/mailman/listinfo/slf4j-user" rel="noreferrer" target="_blank">http://mailman.qos.ch/mailman/<wbr>listinfo/slf4j-user</a><span class=""><br>
<<a href="http://mailman.qos.ch/mailman/listinfo/slf4j-user" rel="noreferrer" target="_blank">http://mailman.qos.ch/mailman<wbr>/listinfo/slf4j-user</a>><br>
<br>
______________________________<wbr>_________________<br>
slf4j-user mailing list<br></span>
<a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a> <mailto:<a href="mailto:slf4j-user@qos.ch" target="_blank">slf4j-user@qos.ch</a>><br>
<a href="http://mailman.qos.ch/mailman/listinfo/slf4j-user" rel="noreferrer" target="_blank">http://mailman.qos.ch/mailman/<wbr>listinfo/slf4j-user</a><br>
<<a href="http://mailman.qos.ch/mailman/listinfo/slf4j-user" rel="noreferrer" target="_blank">http://mailman.qos.ch/mailman<wbr>/listinfo/slf4j-user</a>><br>
<br>
<br>
</blockquote>
</blockquote></div><br></div>