---------- Forwarded message ---------- From: Debraj Manna <subharaj.ma...@gmail.com> Date: Tue, Jan 16, 2018 at 12:30 AM Subject: SLF4J Warning - Loggers will not work as they were created during initialization phase To: slf4j-user@qos.ch
Cross-posting from stackoverflow <https://stackoverflow.com/questions/48268724/slf4j-warning-loggers-will-not-work-as-they-were-created-during-initialization> I am using slf4j with logback in a dropwizard application. During the application initialization I am seeing logs like below SLF4J: The following loggers will not work because they were created SLF4J: during the default configuration phase of the underlying logging system. SLF4J: See also http://www.slf4j.org/codes.html#substituteLogger SLF4J: com.vnera.healthandmetrics.VneraMetrics I am using logback.xml with my dropwizard application. My code flow looks like below public class VneraMetrics { private static final Logger logger = LoggerFactory.getLogger(VneraMetrics.class); ... // This method is getting called from Service.run() during the dropwizard application initialization public String getSomeValue() { // logger is not accessed from this function return "Some initialized value"; }} public class Service extends Application<Conf> { public static final Logger logger = LoggerFactory.getLogger(Service.class); public static void main(String args[]) { logger.info("Some logs"); Service service = new Service(); service.run(dropWizardArgs); Utils.reloadLogger(); }} Utils.reloadLogger() is loading the loggback configuration as discussed here public static void reloadLogger() { String loggingConfig = System.getProperty("logback.configurationFile"); if(loggingConfig == null) { System.out.println("Logging Config is null"); } LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory(); loggerContext.reset(); JoranConfigurator configurator = new JoranConfigurator(); try { InputStream configStream = FileUtils.openInputStream(new File(loggingConfig)); configurator.setContext(loggerContext); configurator.doConfigure(configStream); // loads logback file configStream.close(); System.out.println("Loaded configuration file"); } catch (JoranException | IOException e) { e.printStackTrace(); System.out.println("Failed to log configuration file"); System.exit(1); } }} *Versions* - Logback - 1.2.3 - Dropwizard - 1.0.2 Can some one let me know what does the SLF4J warning denotes? I have seen the substituteLogger <http://www.slf4j.org/codes.html#substituteLogger> page but this does not mention how can I get around this? On trying to use logger in VneraMetrics it is not printing anything.
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