CODEWITHSUNDEEP
javaloggingenvironment-variableslog4j2
Buddhika
Buddhika

Reputation: 627

Log4j2 - Environment Lookup Failed - Environment Name not append to File Name

I have tried below log4j2 configuration to roll a log file daily. The log file name is on the environment variable. Below is my log4j2.xml file.

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
  <Appenders>

    <!-- Console Appender -->
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d{yyyy-MMM-dd HH:mm:ss a} [%t] %-5level %logger{36} - %msg%n" />
    </Console>

    <!-- Rolling File Appender -->
    <RollingFile name="RollingFile">
      <FileName>C:/MyLogDir/logs/${env:LOG_FILE_NAME}</FileName>
      <FilePattern>C:/MyLogDir/logs/job_log_collector.%d{yyyy-MM-dd}.log.zip</FilePattern>
      <PatternLayout>
        <Pattern>%d{yyyy-MMM-dd HH:mm:ss a} [%t] %-5level %logger{36} - %msg%n</Pattern>
      </PatternLayout>
      <Policies>
        <TimeBasedTriggeringPolicy interval="1" modulate="true" />
      </Policies>
      <DefaultRolloverStrategy max="5" />
    </RollingFile>

  </Appenders>
  <Loggers>
    <Logger name="com.package.name.AppName" level="debug" additivity="false">
      <AppenderRef ref="RollingFile" />
    </Logger>
  </Loggers>
</Configuration>

But I get below error while trying to get this run.

2020-05-06 23:03:27,130 main ERROR Unable to create file C:/MyLogDir/logs/${env:LOG_FILE_NAME} java.io.IOException: The filename, directory name, or volume label syntax is incorrect
    at java.io.WinNTFileSystem.canonicalize0(Native Method)
    at java.io.WinNTFileSystem.canonicalize(WinNTFileSystem.java:428)
    at java.io.File.getCanonicalPath(File.java:618)
    at java.io.File.getCanonicalFile(File.java:643)
    at org.apache.logging.log4j.core.util.FileUtils.makeParentDirs(FileUtils.java:142)
    at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:658)
    at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:639)
    at org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:113)
    at org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:114)
    at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.getFileManager(RollingFileManager.java:209)
    at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:146)
    at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:62)
    at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:122)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:1002)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:942)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:934)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:552)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:241)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:288)
    at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:618)
    at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:691)
    at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:708)
    at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:263)
    at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:153)
    at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
    at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
    at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:602)
    at com.wiley.automation.JobLogCollector.App.<clinit>(App.java:11)

I tried both ${env:LOG_FILE_NAME} and $${env:LOG_FILE_NAME}. But no luck.

Below dependencies used.

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.13.0</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.13.0</version>
</dependency>

Upvotes: 1

Views: 2531

Answers (2)

rgoers
rgoers

Reputation: 9151

Your configuration looks correct. If you have an environment variable defined named LOG_FILE_NAME this should be working. The Log4j EnvironmentLookup just calls System.getenv(key) where key would be "LOG_FILE_NAME". You should verify in your application that this variable is accessible in the environment. You could add System.out.println(System.getEnv()) to your main method to print out all the environment variables.

You could also add status="debug" to your logging configuration but I doubt it will provide you with any more diagnostic information than what you already have.

Upvotes: 2

Rahul Gupta
Rahul Gupta

Reputation: 520

Remove env: from your xml and try below given syntax

 <FileName>C:/MyLogDir/logs/${LOG_FILE_NAME}</FileName>

Upvotes: 0

Related Questions