Volkan Yazici created LOG4J2-3183:
-------------------------------------
Summary: JsonTemplateLayout epoch resolver renders incorrect values
Key: LOG4J2-3183
URL: https://issues.apache.org/jira/browse/LOG4J2-3183
Project: Log4j 2
Issue Type: Bug
Components: JsonTemplateLayout
Affects Versions: 2.14.1, 2.14.0
Reporter: Volkan Yazici
Assignee: Volkan Yazici
Fix For: 2.15.0
JTL epoch resolver renders the same timestamp repeatedly. See the following
application using {{log4j-layout-template-json}} 2.14.1:
{code:java}
public static void main(String[] args) throws InterruptedException {
initLog4j();
Logger logger = LogManager.getLogger();
for (int i = 0; i < 5; i++) {
logger.info("{}", i);
Thread.sleep(100);
}
}
private static LoggerContext initLog4j() {
// Create the configuration builder.
ConfigurationBuilder<BuiltConfiguration> configBuilder =
ConfigurationBuilderFactory
.newConfigurationBuilder()
.setStatusLevel(Level.ERROR)
.setConfigurationName(TimeDriftDemo.class.getSimpleName());
// Create the configuration.
String appenderName = "Console";
String eventTemplate = "" +
"[{\"$resolver\":\"timestamp\",\"epoch\":{\"unit\":\"nanos\"}}" +
",{\"$resolver\":\"timestamp\",\"pattern\":{\"format\":\"ss.SSS'Z'\",\"timeZone\":\"UTC\",\"locale\":\"en_US\"}}"
+
"]";
Configuration config = configBuilder
.add(configBuilder
.newAppender(appenderName, "Console")
.add(configBuilder
.newLayout("JsonTemplateLayout")
.addAttribute(
"eventTemplate",
eventTemplate)))
.add(configBuilder.newLogger("com.vlkan", Level.TRACE))
.add(configBuilder
.newRootLogger(Level.ERROR)
.add(configBuilder.newAppenderRef(appenderName)))
.build(false);
// Initialize the configuration.
return Configurator.initialize(config);
}
{code}
Note the identical epochs in the output:
{code:json}
[1635411617932465000,"17.932Z"]
[1635411617932465000,"18.034Z"]
[1635411617932465000,"18.134Z"]
[1635411617932465000,"18.234Z"]
[1635411617932465000,"18.335Z"]
{code}
The issue was originally reported by Andrew Harris in [a log4j-user
post|https://lists.apache.org/thread.html/re7498afa43c9cb91391b0798c1f7bbf4ea97111af1130ebeb155b824%40%3Clog4j-user.logging.apache.org%3E].
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