In general, our suggestion is to use the configuration file as a template and
use dynamic components such as Lookups or Selectors. Choosing the log file
directory could easily be handled by a Lookup, depending on what criteria you
are using to determine it.
In general, Logging Frameworks need not to fail. Most users really don’t like
it if startup of the application fails due to logging issues. So when creation
of a configuration fails Log4j logs the errors. In some cases it will just
ignore the components that failed and in more serious cases it will ignore the
created configuration, which would leave you with the default logging
configuration.
I am sure there are ways that we could detect that you want the exceptions
propograted but I am sure it would take a bit of work.
If you could provide more information on what you need to be dynamic I am sure
we could help with that. Having said that though, there isn’t much that is
going to help you with a Permission Denied exception trying to write to a log
file except for providing a Fallback appender or enhancing the file appenders
to support alternate locations.
Ralph
> On Nov 13, 2019, at 1:48 PM, Bobby Bissett <robert.biss...@enterprisedb.com>
> wrote:
>
> Hi all,
>
> We use log4j2, version 2.11.1, and have programmatic configuration because
> we don't know until runtime what the logging settings are. For instance,
> log directory for file logging, or syslog settings if that's used instead.
>
> I can provide the code we use to set things up if it helps, but don't know
> if that's needed given description/exceptions below. Our problem is that
> the Configurator.initialize(builder.build()) step doesn't throw exceptions
> back to us. Our builder is:
> ConfigurationBuilder<BuiltConfiguration> builder =
> ConfigurationBuilderFactory.newConfigurationBuilder()
>
> Instead, it outputs stack traces to std err (or out), so we have large
> stack traces at startup instead of a message what we would provide to the
> end user. Worse, no exception is thrown back to our code, so we start up
> anyway, except with no logging any more once we get to the point that std
> out/err are supposed to go to our logs.
>
> The culprit is PluginBuilder#build, around line 128:
> } catch (final Exception e) {
> LOGGER.error("Could not create plugin of type {} for element
> {}: {}",
> this.clazz, node.getName(),
> (e instanceof InvocationTargetException ?
> ((InvocationTargetException) e).getCause() : e).toString(), e);
> }
>
> The stacks output are below. Is there anything I can change to not have
> log4j2 print stack traces, and more importantly find out that something
> went wrong so we know to not keep running?
>
> Thanks,
> Bobby
>
> Output at startup for a simple case like the log directory (for file
> logging) not being writeable:
>
> 11/13/19 3:27:39 PM 2019-11-13 15:27:39,457 main ERROR FileManager
> (/root/efm.log) java.io.FileNotFoundException: /root/efm.log (Permission
> denied) java.io.FileNotFoundException: /root/efm.log (Permission denied)
> 11/13/19 3:27:39 PM at java.io.FileOutputStream.open0(Native Method)
> 11/13/19 3:27:39 PM at
> java.io.FileOutputStream.open(FileOutputStream.java:270)
> 11/13/19 3:27:39 PM at
> java.io.FileOutputStream.<init>(FileOutputStream.java:213)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileManager$FileManagerFactory.createManager(FileManager.java:422)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileManager$FileManagerFactory.createManager(FileManager.java:406)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:113)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:114)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileManager.getFileManager(FileManager.java:180)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileAppender$Builder.build(FileAppender.java:95)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileAppender$Builder.build(FileAppender.java:51)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:123)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:959)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:899)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:891)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:514)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:238)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:204)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:161)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:57)
> 11/13/19 3:27:39 PM at [our code that is initializing the logging]
> 11/13/19 3:27:39 PM
> 11/13/19 3:27:39 PM 2019-11-13 15:27:39,469 main ERROR Could not create
> plugin of type class org.apache.logging.log4j.core.appender.FileAppender
> for element File: java.lang.IllegalStateException: ManagerFactory
> [org.apache.logging.log4j.core.appender.FileManager$FileManagerFactory@7c83dc97]
> unable to create manager for [/root/efm.log] with data
> [org.apache.logging.log4j.core.appender.FileManager$FactoryData@7748410a]
> java.lang.IllegalStateException: ManagerFactory
> [org.apache.logging.log4j.core.appender.FileManager$FileManagerFactory@7c83dc97]
> unable to create manager for [/root/efm.log] with data
> [org.apache.logging.log4j.core.appender.FileManager$FactoryData@7748410a]
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:115)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:114)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileManager.getFileManager(FileManager.java:180)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileAppender$Builder.build(FileAppender.java:95)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.appender.FileAppender$Builder.build(FileAppender.java:51)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:123)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:959)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:899)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:891)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:514)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:238)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:204)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:161)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:57)
> 11/13/19 3:27:39 PM at [our code that is initializing the logging]
> 11/13/19 3:27:39 PM
> 11/13/19 3:27:39 PM 2019-11-13 15:27:39,470 main ERROR Unable to invoke
> factory method in class org.apache.logging.log4j.core.appender.FileAppender
> for element File: java.lang.IllegalStateException: No factory method found
> for class org.apache.logging.log4j.core.appender.FileAppender
> java.lang.IllegalStateException: No factory method found for class
> org.apache.logging.log4j.core.appender.FileAppender
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.findFactoryMethod(PluginBuilder.java:235)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:135)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:959)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:899)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:891)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:514)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:238)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:204)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:161)
> 11/13/19 3:27:39 PM at
> org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:57)
> 11/13/19 3:27:39 PM at [our code that is initializing the logging]
> 11/13/19 3:27:39 PM
> 11/13/19 3:27:39 PM 2019-11-13 15:27:39,470 main ERROR Null object returned
> for File in Appenders.
> 11/13/19 3:27:39 PM 2019-11-13 15:27:39,474 main ERROR Unable to locate
> appender "file" for logger config "[our logger]"
> 11/13/19 3:27:39 PM 2019-11-13 15:27:39,474 main ERROR Unable to locate
> appender "file" for logger config "[other logger used in 3rd party lib]"
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