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  1. Log4j 2
  2. LOG4J2-2967

NullPointerException when used the messageParameter resolver of the JsonLayoutTemplate

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Details

    • Bug
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • 2.14.0
    • 3.0.0, 2.14.1
    • Layouts
    • None
      • JDK 8
      • Spring Boot 2.3.4
      • Log4j2 2.14.0

    Description

      I have used the new messageParameter resolver of the JsonLayoutTemplate introduced with log4j2 v2.14.0 (see LOG4J2-2936).

      I configured a Spring Boot app with the following lo4j2.xml:

      <?xml version="1.0" encoding="UTF-8"?>
<Configuration>
	<Appenders>
		<Console name="console" target="SYSTEM_OUT">
			<JsonTemplateLayout eventTemplateUri="classpath:MyCustomLayout.json" />
		</Console>
	</Appenders>
	<Loggers>
		<Root level="info">
			<AppenderRef ref="console" />
		</Root>
	</Loggers>
</Configuration>

      and the following custom JSON template layout:

      {
  "@timestamp": {
    "$resolver": "timestamp",
    "pattern": {
      "format": "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'",
      "timeZone": "UTC"
    }
  },
  "level": {
    "$resolver": "level",
    "field": "name"
  },
  "message": {
    "$resolver": "message",
    "stringified": true
  },
  "thread": {
    "$resolver": "thread",
    "field": "name"
  },
  "logger": {
    "$resolver": "logger",
    "field": "name"
  },
  "labels": {
    "$resolver": "mdc",
    "flatten": true,
    "stringified": true
  },
  "error.type": {
    "$resolver": "exception",
    "field": "className"
  },
  "error.message": {
    "$resolver": "exception",
    "field": "message"
  },
  "error.stack_trace": {
    "$resolver": "exception",
    "field": "stackTrace",
    "stringified": true
  },
  "p0": {
    "$resolver": "messageParameter",
    "index": 0,
    "stringified": true
  },
  "p1": {
    "$resolver": "messageParameter",
    "index": 1,
    "stringified": true
  },
  "p2": {
    "$resolver": "messageParameter",
    "index": 2,
    "stringified": true
  },
  "p3": {
    "$resolver": "messageParameter",
    "index": 3,
    "stringified": true
  }

      When the app starts the following NullPointerException occurs:

      2020-11-28 18:59:57,926 main ERROR An exception occurred processing Appender console java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 1
	at org.apache.logging.log4j.layout.template.json.resolver.MessageParameterResolver.resolve(MessageParameterResolver.java:138)
	at org.apache.logging.log4j.layout.template.json.resolver.MessageParameterResolver.resolve(MessageParameterResolver.java:74)
	at org.apache.logging.log4j.layout.template.json.resolver.TemplateResolver.resolve(TemplateResolver.java:39)
	at org.apache.logging.log4j.layout.template.json.resolver.TemplateResolvers$4.resolve(TemplateResolvers.java:320)
	at org.apache.logging.log4j.layout.template.json.JsonTemplateLayout.encode(JsonTemplateLayout.java:237)
	at org.apache.logging.log4j.layout.template.json.JsonTemplateLayout.encode(JsonTemplateLayout.java:52)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:197)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:190)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:181)
	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
	at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:543)
	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:502)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:485)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:460)
	at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:82)
	at org.apache.logging.log4j.core.Logger.log(Logger.java:161)
	at org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2198)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2152)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2135)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:1994)
	at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1852)
	at org.apache.commons.logging.LogAdapter$Log4jLog.log(LogAdapter.java:270)
	at org.apache.commons.logging.LogAdapter$Log4jLog.info(LogAdapter.java:230)
	at org.springframework.boot.StartupInfoLogger.logStarting(StartupInfoLogger.java:55)
	at org.springframework.boot.SpringApplication.logStartupInfo(SpringApplication.java:637)
	at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:373)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:314)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
	at com.mycompanydomain.Application.main(Application.java:14)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:107)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
	at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)

{"@timestamp":"2020-11-28T17:59:57.944Z","level":"INFO","message":"The following profiles are active: master","thread":"main","logger":"com.mycompanidomain.Application","p0":null,"p1":null,"p2":null,"p3":null}
2020-11-28 19:00:02,249 main ERROR An exception occurred processing Appender console java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 2
	at org.apache.logging.log4j.layout.template.json.resolver.MessageParameterResolver.resolve(MessageParameterResolver.java:138)
	at org.apache.logging.log4j.layout.template.json.resolver.MessageParameterResolver.resolve(MessageParameterResolver.java:74)
	at org.apache.logging.log4j.layout.template.json.resolver.TemplateResolver.resolve(TemplateResolver.java:39)
	at org.apache.logging.log4j.layout.template.json.resolver.TemplateResolvers$4.resolve(TemplateResolvers.java:320)
	at org.apache.logging.log4j.layout.template.json.JsonTemplateLayout.encode(JsonTemplateLayout.java:237)
	at org.apache.logging.log4j.layout.template.json.JsonTemplateLayout.encode(JsonTemplateLayout.java:52)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:197)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:190)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:181)
	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
	at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:543)
	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:502)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:485)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:460)
	at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:82)
	at org.apache.logging.log4j.core.Logger.log(Logger.java:161)
	at org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2198)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2152)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2135)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2034)
	at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1907)
	at org.apache.logging.slf4j.Log4jLogger.info(Log4jLogger.java:189)
	at org.springframework.data.repository.config.RepositoryConfigurationDelegate.registerRepositoriesIn(RepositoryConfigurationDelegate.java:127)
	at org.springframework.data.repository.config.RepositoryBeanDefinitionRegistrarSupport.registerBeanDefinitions(RepositoryBeanDefinitionRegistrarSupport.java:107)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.lambda$loadBeanDefinitionsFromRegistrars$1(ConfigurationClassBeanDefinitionReader.java:384)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader$$Lambda$297.0000000086A93A90.accept(Unknown Source)
	at java.util.LinkedHashMap.forEach(LinkedHashMap.java:684)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:383)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:148)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:120)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:331)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:236)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:280)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:96)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:707)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:533)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
	at com.mycompanydomain.Application.main(Application.java:14)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:107)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
	at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)

      These errors appear only on the first four log messages, after that the messages are properly written without errors.

      {"@timestamp":"2020-11-28T18:00:12.390Z","level":"INFO","message":"Tomcat initialized with port(s): 8080 (http)","thread":"main","logger":"org.springframework.boot.web.embedded.tomcat.TomcatWebServer","p0":null,"p1":null,"p2":null,"p3":null}
{"@timestamp":"2020-11-28T18:00:12.452Z","level":"INFO","message":"Initializing ProtocolHandler [\"http-nio-8080\"]","thread":"main","logger":"org.apache.coyote.http11.Http11NioProtocol","p0":null,"p1":null,"p2":null,"p3":null}
{"@timestamp":"2020-11-28T18:00:12.454Z","level":"INFO","message":"Starting service [Tomcat]","thread":"main","logger":"org.apache.catalina.core.StandardService","p0":null,"p1":null,"p2":null,"p3":null}
{"@timestamp":"2020-11-28T18:00:12.455Z","level":"INFO","message":"Starting Servlet engine: [Apache Tomcat/9.0.38]","thread":"main","logger":"org.apache.catalina.core.StandardEngine","p0":null,"p1":null,"p2":null,"p3":null}
{"@timestamp":"2020-11-28T18:00:12.622Z","level":"INFO","message":"Initializing Spring embedded WebApplicationContext","thread":"main","logger":"org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/]","p0":null,"p1":null,"p2":null,"p3":null}
{"@timestamp":"2020-11-28T18:00:12.622Z","level":"INFO","message":"Root WebApplicationContext: initialization completed in 14385 ms","thread":"main","logger":"org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext","p0":null,"p1":null,"p2":null,"p3":null}

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          Web Link GitHub Pull Request #443

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              vy Volkan Yazici
              diepet Diego Pettisani
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                Created:
                Updated:
                Resolved: