Scala：使用log4j将日志写入文件 [英] Scala: Write log to file with log4j
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问题描述
我正在尝试在eclipse中构建一个基于scala的jar文件，它使用log4j来创建日志。它在控制台中完美打印出来，但当我尝试使用log4j.properties文件将其写入日志文件时，没有任何反应。
项目结构如下
loggerTest.scala
package scala.n *****。n ****
import org.apache.log4j.Logger
object loggerTest extends LogHelper {
def main（args：Array [String]）{
log.info（This is info）;
log.error（这是错误）;
log.warn（这是警告）;
}
}
trait LogHelper {
lazy val log = Logger.getLogger（this.getClass.getName）
}
log4j.properties
#Root logger选项
log4j.rootLogger = WARN，stdout，file
＃将日志消息重定向到控制台
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern =％d {yyyy -MM-dd HH：mm：ss}％-5p％c {1}：％L - ％m％n
＃将日志消息重定向到日志文件
log4j.appender。 file = org.apache.log4j.RollingFileAppender
log4j.appender.file.File = / home / abc / test / abc.log
log4j.appender.file.encoding = UTF-8
log4j.appender.file.MaxFileSize = 2kB
log4j.appender.file.MaxBackupIndex = 1
log4j.appender.file.layout = org.apache.log4j.PatternLayout
log4j.appender.file .layout.ConversionPattern =％d {yyyy-MM-dd HH：mm：ss}％-5p％c {1 }：％L - ％m％n
pom.xml
< project xmlns =http://maven.apache.org/POM/4.0.0xmlns：xsi =http：//www.w3。 org / 2001 / XMLSchema-instancexsi：schemaLocation =http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd\">
< modelVersion> 4.0.0< / modelVersion>
< groupId> loggerTest< / groupId>
< artifactId> loggerTest< / artifactId>
< version> 0.0.1-SNAPSHOT< / version>
< name> loggerTest< / name>
< description> loggerTest< / description>
< repositories>
< repository>
< id> scala-tools.org< / id>
< name> Scala-tools Maven2存储库< / name>
< url> http：//scala-tools.org/repo-releases< / url>
< / repository>
< repository>
< id> maven-hadoop< / id>
< name> Hadoop版本< / name>
< url> https://repository.cloudera.com/content/repositories/releases/< / url>
< / repository>
< repository>
< id> cloudera-repos< / id>
< name> Cloudera Repos< / name>
< url> https://repository.cloudera.com/artifactory/cloudera-repos/< / url>
< / repository>
< / repositories>
< pluginRepositories>
< pluginRepository>
< id> scala-tools.org< / id>
< name> Scala-tools Maven2存储库< / name>
< url> http：//scala-tools.org/repo-releases< / url>
< / pluginRepository>
< / pluginRepositories>
< properties>
< project.build.sourceEncoding> UTF-8< /project.build.sourceEncoding>
< project.reporting.outputEncoding> UTF-8< /project.reporting.outputEncoding>
< / properties>
< build>
< plugins>
<！ - 混合scala / java编译 - >
< plugin>
< groupId> org.scala-tools< / groupId>
< artifactId> maven-scala-plugin< / artifactId>
< executions>
< execution>
< id> compile< / id>
< goals>
< goal> compile< / goal>
< / goals>
< phase> compile< / phase>
< / execution>
< execution>
< id> test-compile< / id>
< goals>
< goal> testCompile< / goal>
< / goals>
< phase> test-compile< / phase>
< / execution>
< execution>
< phase> process-resources< / phase>
< goals>
< goal> compile< / goal>
< / goals>
< / execution>
< / executions>
< / plugin>
< plugin>
< artifactId> maven-compiler-plugin< / artifactId>
< configuration>
< source> 1.7< / source>
< target> 1.7< / target>
< / configuration>
< / plugin>
< plugin>
< groupId> org.apache.maven.plugins< / groupId>
< artifactId> maven-jar-plugin< / artifactId>
< configuration>
< archive>
< manifest>
< addClasspath> true< / addClasspath>
< mainClass> fully.qualified.MainClass< / mainClass>
< / manifest>
< / archive>
< / configuration>
< / plugin>
< / plugins>
< pluginManagement>
< plugins>
<！ - 此插件的配置仅用于存储Eclipse m2e设置
。它对Maven构建本身没有影响。 - >
< plugin>
< groupId> org.eclipse.m2e< / groupId>
< artifactId> lifecycle-mapping< / artifactId>
< version> 1.0.0< / version>
< configuration>
< lifecycleMappingMetadata>
< pluginExecutions>
< pluginExecution>
< pluginExecutionFilter>
< groupId> org.scala-tools< / groupId>
< artifactId>
maven-scala-plugin
< / artifactId>
< versionRange>
[2.15.2，）
< / versionRange>
< goals>
< goal> compile< / goal>
< goal> testCompile< / goal>
< / goals>
< / pluginExecutionFilter>
< action>
< execute>< / execute>
< / action>
< / pluginExecution>
< / pluginExecutions>
< / lifecycleMappingMetadata>
< / configuration>
< / plugin>
< / plugins>
< / pluginManagement>
< / build>
< dependencies>
< dependency>
< groupId> org.apache.spark< / groupId>
< artifactId> spark-core_2.10< / artifactId>
< version> 1.5.0< / version>
< / dependency>
<依赖>
< groupId> org.apache.spark< / groupId>
< artifactId> spark-hive_2.10< / artifactId>
< version> 1.5.0< / version>
< / dependency>
<依赖>
< groupId> org.apache.spark< / groupId>
< artifactId> spark-sql_2.10< / artifactId>
< version> 1.5.0< / version>
< / dependency>
< dependency>
< groupId> org.scala-lang< / groupId>
< artifactId> scala-library< / artifactId>
< version> 2.10.4< / version>
< / dependency>
< / dependencies>
< / project>
当我将其作为maven构建运行时，它会在target文件夹中生成一个jar文件。 / p>
我将jar复制到/ home / abc / test
我用命令<在spark shell中运行jar / p>
$ spark-submit --class scala.n *****。n *****。loggerTest loggerTest-0.0 .1-SNAPSHOT.jar
控制台出来没问题，但它应该写入/ home中的文件/ abc / log它没有。
有人可以帮忙吗？
解决方案
您在部署应用程序时遇到问题，您应该为执行程序和驱动程序定义log4j文件，如下所示
spark-submit - -class MAIN_CLASS --driver-java-options-Dlog4j.configuration = file：PATH_OF_LOG4J--confspark.executor.extraJavaOptions = -Dlog4j.configuration = file：PATH_OF_LOG4J--master MASTER_IP：PORT JAR_PATH
有关详细信息和分步解决方案，您可以检查k此链接 https://blog.knoldus .com / 2016/02/23 / logging-spark-application-on-standalone-cluster /
I am trying to build a scala based jar file in eclipse that uses log4j to make logs. It prints out perfectly in the console but when I try to use log4j.properties file to make it write to a log file, nothing happens.
The project structure is as follows
loggerTest.scala
package scala.n*****.n****
import org.apache.log4j.Logger
object loggerTest extends LogHelper {
def main(args : Array[String]){
log.info("This is info");
log.error("This is error");
log.warn("This is warn");
}
}
trait LogHelper {
lazy val log = Logger.getLogger(this.getClass.getName)
}
log4j.properties
# Root logger option
log4j.rootLogger=WARN, stdout, file
# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
# Redirect log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=/home/abc/test/abc.log
log4j.appender.file.encoding=UTF-8
log4j.appender.file.MaxFileSize=2kB
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>loggerTest</groupId>
<artifactId>loggerTest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>loggerTest</name>
<description>loggerTest</description>
<repositories>
<repository>
<id>scala-tools.org</id>
<name>Scala-tools Maven2 Repository</name>
<url>http://scala-tools.org/repo-releases</url>
</repository>
<repository>
<id>maven-hadoop</id>
<name>Hadoop Releases</name>
<url>https://repository.cloudera.com/content/repositories/releases/</url>
</repository>
<repository>
<id>cloudera-repos</id>
<name>Cloudera Repos</name>
<url>https://repository.cloudera.com/artifactory/cloudera-repos/</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>scala-tools.org</id>
<name>Scala-tools Maven2 Repository</name>
<url>http://scala-tools.org/repo-releases</url>
</pluginRepository>
</pluginRepositories>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
</properties>
<build>
<plugins>
<!-- mixed scala/java compile -->
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<executions>
<execution>
<id>compile</id>
<goals>
<goal>compile</goal>
</goals>
<phase>compile</phase>
</execution>
<execution>
<id>test-compile</id>
<goals>
<goal>testCompile</goal>
</goals>
<phase>test-compile</phase>
</execution>
<execution>
<phase>process-resources</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>fully.qualified.MainClass</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!--This plugin's configuration is used to store Eclipse m2e settings
only. It has no influence on the Maven build itself. -->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.scala-tools</groupId>
<artifactId>
maven-scala-plugin
</artifactId>
<versionRange>
[2.15.2,)
</versionRange>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute></execute>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.10</artifactId>
<version>1.5.0</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-hive_2.10</artifactId>
<version>1.5.0</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.10</artifactId>
<version>1.5.0</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.10.4</version>
</dependency>
</dependencies>
</project>
When I run it as a maven build, it generates a jar file in "target" folder.
I copy the jar to /home/abc/test
I run that jar in spark shell with command
$ spark-submit --class scala.n*****.n*****.loggerTest loggerTest-0.0.1-SNAPSHOT.jar
The console come out alright but it should write to a file in /home/abc/log which it does not.
Could someone please help?
解决方案
Hello while you are deploying you application you should define log4j file for executor and driver as follows
spark-submit --class MAIN_CLASS --driver-java-options "-Dlog4j.configuration=file:PATH_OF_LOG4J" --conf "spark.executor.extraJavaOptions=-Dlog4j.configuration=file:PATH_OF_LOG4J" --master MASTER_IP:PORT JAR_PATH
For more details and step by step solution you can check this link https://blog.knoldus.com/2016/02/23/logging-spark-application-on-standalone-cluster/
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