A better error message sounds like a good idea. If you make a Jira ticket for this, please make it part of the "ergonomics" epic: https://issues.apache.org/jira/browse/LOG4J2-1811
On Tue, Apr 11, 2017 at 9:19 PM, Mikael Ståldal <mikael.stal...@magine.com> wrote: > Some configuration file formats (JSON, YAML) require additional runtime > dependencies. If a such dependency is missing, configuration file location > will stop and not try other configuration files with lower priority. > > E.g. if I have both log4j2.json and log4j2.xml in classpath, but not > Jackson (required for JSON config), then no configuration file will be > loaded and I get this error: > > ERROR StatusLogger No log4j2 configuration file found. Using default > configuration: logging only errors to the console. Set system property > 'org.apache.logging.log4j.simplelog.StatusLogger.level' to TRACE to show > Log4j2 internal initialization logging. > > When enabling status logging TRACE, I get a lot of logging (see below) and > it's not so easy to figure out what went wrong. > > Would it make sense to emit a more explicit error message on WARN level > when this occurs? > > > DEBUG StatusLogger Loaded Provider Provider[priority=10, > className=org.apache.logging.log4j.core.impl.Log4jContextFactory, > url=jar:file:/home/mikes/.m2/repository/org/apache/logging/ > log4j/log4j-core/2.8.2/log4j-core-2.8.2.jar!/META-INF/log4j-provider.properties, > classLoader=sun.misc.Launcher$AppClassLoader@18b4aac2] > DEBUG StatusLogger Using ShutdownCallbackRegistry class > org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry > DEBUG StatusLogger Not in a ServletContext environment, thus not loading > WebLookup plugin. > DEBUG StatusLogger AsyncLogger.ThreadNameStrategy=CACHED > TRACE StatusLogger Using default SystemClock for timestamps. > DEBUG StatusLogger Not in a ServletContext environment, thus not loading > WebLookup plugin. > DEBUG StatusLogger Took 0.096889 seconds to load 198 plugins from > sun.misc.Launcher$AppClassLoader@18b4aac2 > DEBUG StatusLogger PluginManager 'Converter' found 41 plugins > DEBUG StatusLogger Starting OutputStreamManager SYSTEM_OUT.false.false-1 > DEBUG StatusLogger Starting LoggerContext[name=18b4aac2, > org.apache.logging.log4j.core.LoggerContext@6d8a00e3]... > DEBUG StatusLogger Reconfiguration started for context[name=18b4aac2] at > URI null (org.apache.logging.log4j.core.LoggerContext@6d8a00e3) with > optional ClassLoader: null > DEBUG StatusLogger Not in a ServletContext environment, thus not loading > WebLookup plugin. > DEBUG StatusLogger PluginManager 'ConfigurationFactory' found 4 plugins > DEBUG StatusLogger Not in a ServletContext environment, thus not loading > WebLookup plugin. > DEBUG StatusLogger Not in a ServletContext environment, thus not loading > WebLookup plugin. > DEBUG StatusLogger Missing dependencies for Yaml support > DEBUG StatusLogger Not in a ServletContext environment, thus not loading > WebLookup plugin. > DEBUG StatusLogger Missing dependencies for Json support > DEBUG StatusLogger Not in a ServletContext environment, thus not loading > WebLookup plugin. > DEBUG StatusLogger Using configurationFactory > org.apache.logging.log4j.core.config.ConfigurationFactory$Factory@3a82f6ef > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.properties] using > context class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.properties] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yml] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yaml] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yaml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yaml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.yaml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.json] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.json] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.json] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.json] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.jsn] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.jsn] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.jsn] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.jsn] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.xml] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.xml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.xml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test18b4aac2.xml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test.properties] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.properties] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test.yml] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test.yml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.yml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.yml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test.yaml] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test.yaml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.yaml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.yaml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test.json] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test.json] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.json] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.json] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test.jsn] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test.jsn] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.jsn] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.jsn] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2-test.xml] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2-test.xml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.xml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2-test.xml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j218b4aac2.properties] using > context class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j218b4aac2.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.properties] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j218b4aac2.yml] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j218b4aac2.yml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.yml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.yml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j218b4aac2.yaml] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j218b4aac2.yaml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.yaml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.yaml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j218b4aac2.json] using context > class loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j218b4aac2.json] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.json] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.json] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j218b4aac2.jsn] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j218b4aac2.jsn] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.jsn] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.jsn] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j218b4aac2.xml] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j218b4aac2.xml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.xml] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j218b4aac2.xml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2.properties] using context class > loader sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2.properties] using > sun.misc.Launcher$AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2.properties] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2.yml] using context class loader > sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2.yml] using sun.misc.Launcher$ > AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2.yml] using sun.misc.Launcher$ > AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2.yml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2.yaml] using context class loader > sun.misc.Launcher$AppClassLoader@18b4aac2. > TRACE StatusLogger Trying to find [log4j2.yaml] using sun.misc.Launcher$ > AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2.yaml] using sun.misc.Launcher$ > AppClassLoader@18b4aac2 class loader. > TRACE StatusLogger Trying to find [log4j2.yaml] using > ClassLoader.getSystemResource(). > TRACE StatusLogger Trying to find [log4j2.json] using context class loader > sun.misc.Launcher$AppClassLoader@18b4aac2. > ERROR StatusLogger No log4j2 configuration file found. Using default > configuration: logging only errors to the console. Set system property > 'org.apache.logging.log4j.simplelog.StatusLogger.level' to TRACE to show > Log4j2 internal initialization logging. > > > -- > [image: MagineTV] > > *Mikael Ståldal* > Senior software developer > > *Magine TV* > mikael.stal...@magine.com > Grev Turegatan 3 | 114 46 Stockholm, Sweden | www.magine.com > > Privileged and/or Confidential Information may be contained in this > message. If you are not the addressee indicated in this message > (or responsible for delivery of the message to such a person), you may not > copy or deliver this message to anyone. In such case, > you should destroy this message and kindly notify the sender by reply > email. >
