[
https://issues.apache.org/jira/browse/LOG4J2-1794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Simon Cooper updated LOG4J2-1794:
---------------------------------
Description:
Sample code:
{code} private static final Logger Log = LogManager.getLogger();
public static void main(String[] args) throws Throwable {
ConfigurationBuilder<BuiltConfiguration> builder =
ConfigurationBuilderFactory.newConfigurationBuilder();
builder.setConfigurationName("Test");
AppenderComponentBuilder console = builder.newAppender("Stdout",
"Console")
.add(builder.newLayout("PatternLayout").addAttribute("pattern",
"Format: %m%n"));
builder.add(console);
builder.add(builder.newRootLogger(Level.INFO).add(builder.newAppenderRef("Stdout")));
Configurator.initialize(builder.build());
Configurator.setRootLevel(Level.INFO);
LogManager.getLogger().info("Log!");
}{code}
The log statement at the bottom doesn't use the specified format, it uses the
existing format. If the {{private static final Log = ...}} statement at the top
is commented out, the log *does* use the reconfigured format.
Reconfiguring the log settings should affect any loggers already created.
Waiting until the logging is configured before creating any loggers is not
always feasible - for example, if your entrypoint class has a static {{Logger}}
and the reconfiguration is being done by a library you're calling into.
was:
Sample code:
{code} private static final Logger Log = LogManager.getLogger();
public static void main(String[] args) throws Throwable {
ConfigurationBuilder<BuiltConfiguration> builder =
ConfigurationBuilderFactory.newConfigurationBuilder();
builder.setConfigurationName("Test");
AppenderComponentBuilder console = builder.newAppender("Stdout",
"Console")
.addAttribute("follow", true)
.add(builder.newLayout("PatternLayout").addAttribute("pattern",
"Format: %m%n"));
builder.add(console);
builder.add(builder.newRootLogger(Level.INFO).add(builder.newAppenderRef("Stdout")));
Configurator.initialize(builder.build());
Configurator.setRootLevel(Level.INFO);
LogManager.getLogger().info("Log!");
}{code}
The log statement at the bottom doesn't use the specified format, it uses the
existing format. If the {{private static final Log = ...}} statement at the top
is commented out, the log *does* use the reconfigured format.
Reconfiguring the log settings should affect any loggers already created.
Waiting until the logging is configured before creating any loggers is not
always feasible - for example, if your entrypoint class has a static {{Logger}}
and the reconfiguration is being done by a library you're calling into.
> Programmatic reconfiguration doesn't affect existing loggers
> ------------------------------------------------------------
>
> Key: LOG4J2-1794
> URL: https://issues.apache.org/jira/browse/LOG4J2-1794
> Project: Log4j 2
> Issue Type: Bug
> Components: Configurators
> Affects Versions: 2.7
> Reporter: Simon Cooper
>
> Sample code:
> {code} private static final Logger Log = LogManager.getLogger();
> public static void main(String[] args) throws Throwable {
> ConfigurationBuilder<BuiltConfiguration> builder =
> ConfigurationBuilderFactory.newConfigurationBuilder();
> builder.setConfigurationName("Test");
> AppenderComponentBuilder console = builder.newAppender("Stdout",
> "Console")
>
> .add(builder.newLayout("PatternLayout").addAttribute("pattern", "Format:
> %m%n"));
> builder.add(console);
>
> builder.add(builder.newRootLogger(Level.INFO).add(builder.newAppenderRef("Stdout")));
> Configurator.initialize(builder.build());
> Configurator.setRootLevel(Level.INFO);
> LogManager.getLogger().info("Log!");
> }{code}
> The log statement at the bottom doesn't use the specified format, it uses the
> existing format. If the {{private static final Log = ...}} statement at the
> top is commented out, the log *does* use the reconfigured format.
> Reconfiguring the log settings should affect any loggers already created.
> Waiting until the logging is configured before creating any loggers is not
> always feasible - for example, if your entrypoint class has a static
> {{Logger}} and the reconfiguration is being done by a library you're calling
> into.
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