Question

我试图在spark executor中使用自定义log4j appender，以便将所有日志转发到Apache Kafka。

问题是，在fatjar的aploder注册的classloader之前初始化了log4j，所以我最终得到了以下内容：

log4j:ERROR Could not instantiate class [kafka.producer.KafkaLog4jAppender].
java.lang.ClassNotFoundException: kafka.producer.KafkaLog4jAppender
    at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:260)
    at org.apache.log4j.helpers.Loader.loadClass(Loader.java:198)
    at org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:327)
    at org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:124)
    at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:785)
    at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768)
    at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648)
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514)
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:580)
    at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526)
    at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
    at org.apache.spark.Logging$class.initializeLogging(Logging.scala:122)
    at org.apache.spark.Logging$class.initializeIfNecessary(Logging.scala:107)
    at org.apache.spark.Logging$class.log(Logging.scala:51)
    at org.apache.spark.executor.CoarseGrainedExecutorBackend$.log(CoarseGrainedExecutorBackend.scala:126)
    at org.apache.spark.executor.CoarseGrainedExecutorBackend$.run(CoarseGrainedExecutorBackend.scala:137)
    at org.apache.spark.executor.CoarseGrainedExecutorBackend$.main(CoarseGrainedExecutorBackend.scala:235)
    at org.apache.spark.executor.CoarseGrainedExecutorBackend.main(CoarseGrainedExecutorBackend.scala)
log4j:ERROR Could not instantiate appender named "KAFKA".
2015-09-29 13:10:43 [driverPropsFetcher-akka.actor.default-dispatcher-4] INFO akka.event.slf4j.Slf4jLogger: Slf4jLogger started
2015-09-29 13:10:43 [driverPropsFetcher-akka.actor.default-dispatcher-4] INFO Remoting: Starting remoting
2015-09-29 13:10:43 [driverPropsFetcher-akka.actor.default-dispatcher-4] INFO Remoting: Remoting started; listening on addresses :[akka.tcp://driverPropsFetcher@gin3.dev:36918]
2015-09-29 13:10:43 [driverPropsFetcher-akka.actor.default-dispatcher-4] INFO Remoting: Remoting now listens on addresses: [akka.tcp://driverPropsFetcher@gin3.dev:36918]
2015-09-29 13:10:44 [driverPropsFetcher-akka.actor.default-dispatcher-4] INFO akka.remote.RemoteActorRefProvider$RemotingTerminator: Shutting down remote daemon.
2015-09-29 13:10:44 [driverPropsFetcher-akka.actor.default-dispatcher-4] INFO akka.remote.RemoteActorRefProvider$RemotingTerminator: Remote daemon shut down; proceeding with flushing remote transports.
2015-09-29 13:10:44 [sparkExecutor-akka.actor.default-dispatcher-3] INFO akka.event.slf4j.Slf4jLogger: Slf4jLogger started
2015-09-29 13:10:44 [sparkExecutor-akka.actor.default-dispatcher-2] INFO Remoting: Starting remoting
2015-09-29 13:10:44 [sparkExecutor-akka.actor.default-dispatcher-2] INFO Remoting: Remoting started; listening on addresses :[akka.tcp://sparkExecutor@gin3.dev:40067]
2015-09-29 13:10:44 [sparkExecutor-akka.actor.default-dispatcher-2] INFO Remoting: Remoting now listens on addresses: [akka.tcp://sparkExecutor@gin3.dev:40067]
2015-09-29 13:10:44 [driverPropsFetcher-akka.actor.default-dispatcher-5] INFO Remoting: Remoting shut down
....

问题似乎就在这里：https://github.com/apache/spark/blob/v1.3.1/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala#L126

有没有简单的方法可以解决这个问题？我们目前正在使用Spark 1.3.x。

由于

大卫

Answer 1

结束提交带有日志记录deps的额外jar并在用户类路径之前加载它。

LOG_JAR="${THISDIR}/../lib/logging.jar"
spark-submit ...... \
  --files "${LOG4J_CONF},${LOG_JAR}" \
  --conf "spark.driver.extraJavaOptions=-Dlog4j.configuration=`basename ${LOG4J_CONF}`" \
  --conf "spark.driver.extraClassPath=`basename ${LOG_JAR}`" \
  --conf "spark.executor.extraJavaOptions=-Dlog4j.configuration=`basename ${LOG4J_CONF}`" \
  --conf "spark.executor.extraClassPath=`basename ${LOG_JAR}`" \
  ...

https://issues.apache.org/jira/browse/SPARK-10881?filter=-2

Answer 2

2在kafka的hadoop-producer中。

因此您可以添加此依赖项来修复它。

kafka.producer.KafkaLog4jAppender

Answer 3

面对同样的问题，我将发布对我有用的内容，结果发现kafka 0.9中更改了KafkaLog4jAppender类包名称，这是我做的，在pom中添加了依赖

<dependency>
        <groupId>org.apache.kafka</groupId>
        <artifactId>kafka-log4j-appender</artifactId>
        <version>0.9.0.0</version>
    </dependency>

并从

更改了我的log4j.properties

log4j.appender.KAFKA=kafka.producer.KafkaLog4jAppender

到

log4j.appender.KAFKA=org.apache.kafka.log4jappender.KafkaLog4jAppender

在spark执行器中自定义log4j appender

3 个答案: