我正在尝试运行Kafka-0.8 Log4j appender而我无法成功。 我希望我的应用程序通过Log4j appender将日志直接发送到kafka。
这是我的log4j.properties。 我找不到任何合适的编码器，所以我只是将其配置为使用默认编码器。 （例如，我评论了该行。）
log4j.rootLogger=INFO, stdout, KAFKA
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
log4j.appender.KAFKA=kafka.producer.KafkaLog4jAppender
log4j.appender.KAFKA.layout=org.apache.log4j.PatternLayout
log4j.appender.KAFKA.layout.ConversionPattern=%-5p: %c - %m%n
log4j.appender.KAFKA.BrokerList=hnode01:9092
log4j.appender.KAFKA.Topic=DKTestEvent
#log4j.appender.KAFKA.SerializerClass=kafka.log4j.AppenderStringEncoder
这是我的示例应用程序。
import org.apache.log4j.Logger;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.PropertyConfigurator;
public class HelloWorld {
static Logger logger = Logger.getLogger(HelloWorld.class.getName());
public static void main(String[] args) {
PropertyConfigurator.configure(args[0]);
logger.info("Entering application.");
logger.debug("Debugging!.");
logger.info("Exiting application.");
}
}
我用maven编译。 我在我的pom.xml中包含了kafka_2.8.2-0.8.0和log4j_1.2.17
我收到了这些错误：
INFO [main] (Logging.scala:67) - Verifying properties
INFO [main] (Logging.scala:67) - Property metadata.broker.list is overridden to hnode01:9092
INFO [main] (Logging.scala:67) - Property serializer.class is overridden to kafka.serializer.StringEncoder
INFO [main] (HelloWorld.java:14) - Entering application.
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 0 for 1 topic(s) Set(DKTestEvent)
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 1 for 1 topic(s) Set(DKTestEvent)
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 2 for 1 topic(s) Set(DKTestEvent)
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 3 for 1 topic(s) Set(DKTestEvent)
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 4 for 1 topic(s) Set(DKTestEvent)
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 5 for 1 topic(s) Set(DKTestEvent)
.
.
.
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 60 for 1 topic(s) Set(DKTestEvent)
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 61 for 1 topic(s) Set(DKTestEvent)
INFO [main] (HelloWorld.java:14) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 62 for 1 topic(s) Set(DKTestEvent)
INFO [main] (Logging.scala:67) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 63 for 1 topic(s) Set(DKTestEvent)
INFO [main] (Logging.scala:67) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 64 for 1 topic(s) Set(DKTestEvent)
INFO [main] (Logging.scala:67) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 65 for 1 topic(s) Set(DKTestEvent)
INFO [main] (Logging.scala:67) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 66 for 1 topic(s) Set(DKTestEvent)
INFO [main] (Logging.scala:67) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 67 for 1 topic(s) Set(DKTestEvent)
.
.
.
INFO [main] (Logging.scala:67) - Fetching metadata from broker id:0,host:hnode01,port:9092 with correlation id 534 for 1 topic(s) Set(DKTestEvent)
ERROR [main] (Logging.scala:67) -
ERROR [main] (Logging.scala:67) -
ERROR [main] (Logging.scala:67) -
ERROR [main] (Logging.scala:67) -
ERROR [main] (Logging.scala:67) -
ERROR [main] (Logging.scala:67) -
java.lang.StackOverflowError
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
at org.apache.log4j.spi.ThrowableInformation.getThrowableStrRep(ThrowableInformation.java:87)
at org.apache.log4j.spi.LoggingEvent.getThrowableStrRep(LoggingEvent.java:413)
at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:313)
at org.apache.log4j.WriterAppender.append(WriterAppender.java:162)
at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
at org.apache.log4j.Category.callAppenders(Category.java:206)
at org.apache.log4j.Category.forcedLog(Category.java:391)
at org.apache.log4j.Category.error(Category.java:322)
at kafka.utils.Logging$$anonfun$swallowError$1.apply(Logging.scala:105)
at kafka.utils.Logging$$anonfun$swallowError$1.apply(Logging.scala:105)
at kafka.utils.Utils$.swallow(Utils.scala:189)
at kafka.utils.Logging$class.swallowError(Logging.scala:105)
at kafka.utils.Utils$.swallowError(Utils.scala:46)
at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:67)
at kafka.producer.Producer.send(Producer.scala:76)
at kafka.producer.KafkaLog4jAppender.append(KafkaLog4jAppender.scala:96)
at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
at org.apache.log4j.Category.callAppenders(Category.java:206)
at org.apache.log4j.Category.forcedLog(Category.java:391)
at org.apache.log4j.Category.info(Category.java:666)
at kafka.utils.Logging$class.info(Logging.scala:67)
at kafka.client.ClientUtils$.info(ClientUtils.scala:31)
at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:51)
at kafka.producer.BrokerPartitionInfo.updateInfo(BrokerPartitionInfo.scala:82)
at kafka.producer.async.DefaultEventHandler$$anonfun$handle$1.apply$mcV$sp(DefaultEventHandler.scala:67)
at kafka.utils.Utils$.swallow(Utils.scala:187)
at kafka.utils.Logging$class.swallowError(Logging.scala:105)
at kafka.utils.Utils$.swallowError(Utils.scala:46)
at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:67)
at kafka.producer.Producer.send(Producer.scala:76)
at kafka.producer.KafkaLog4jAppender.append(KafkaLog4jAppender.scala:96)
at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
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.
.
如果我不终止该计划，我将继续犯错误。
如果我错过了什么，请告诉我。
答案 0 :(得分：5)
我认为Jonas已经确定了问题，即Kafka生产者日志记录也被记录到Kafka appender导致无限循环并最终堆栈溢出（没有双关语意图） 您可以将所有Kafka日志配置为转到其他appender。以下显示将输出发送到stdout：
log4j.logger.kafka=INFO, stdout
所以你应该在你的log4j.properties
中得到以下结果log4j.rootLogger=INFO, stdout, KAFKA
log4j.logger.kafka=INFO, stdout
log4j.logger.HelloWorld=INFO, KAFKA
答案 1 :(得分：2)
我已经能够通过Kafka 0.8.2.2中的log4j生成事件。这是我的log4j配置：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %c{1} - %m%n" />
</layout>
</appender>
<appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
<param name="Threshold" value="INFO" />
<param name="MaxBackupIndex" value="100" />
<param name="File" value="/tmp/agna-LogFile.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%c{1}] %m %n" />
</layout>
</appender>
<appender name="kafkaAppender" class="kafka.producer.KafkaLog4jAppender">
<param name="Topic" value="kafkatopic" />
<param name="BrokerList" value="localhost:9092" />
<param name="syncSend" value="true" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L %% - %m%n" />
</layout>
</appender>
<logger name="org.apache.kafka">
<level value="error" />
<appender-ref ref="console" />
</logger>
<logger name="com.example.kafkaLogger">
<level value="debug" />
<appender-ref ref="kafkaAppender" />
</logger>
<root>
<priority value="debug" />
<appender-ref ref="console" />
</root>
</log4j:configuration>
以下是源代码：
package com.example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.common.serialization.StringSerializer;
public class JsonProducer {
static Logger defaultLogger = LoggerFactory.getLogger(JsonProducer.class);
static Logger kafkaLogger = LoggerFactory.getLogger("com.example.kafkaLogger");
public static void main(String args[]) {
JsonProducer obj = new JsonProducer();
String str = obj.getJsonObjAsString();
// Use the logger
kafkaLogger.info(str);
try {
// Construct and send message
obj.constructAndSendMessage();
} catch (InterruptedException e) {
defaultLogger.error("Caught interrupted exception " + e);
} catch (ExecutionException e) {
defaultLogger.error("Caught execution exception " + e);
}
}
private String getJsonObjAsString() {
JSONObject obj = new JSONObject();
obj.put("name", "John");
obj.put("age", new Integer(55));
obj.put("address", "123 MainSt, Palatine, IL");
JSONArray list = new JSONArray();
list.add("msg 1");
list.add("msg 2");
list.add("msg 3");
obj.put("messages", list);
return obj.toJSONString();
}
private void constructAndSendMessage() throws InterruptedException, ExecutionException {
Properties props = new Properties();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
KafkaProducer<String, String> producer = new KafkaProducer<String, String>(props);
boolean sync = false;
String topic = "kafkatopic";
String key = "mykey";
String value = "myvalue1 mayvalue2 myvalue3";
ProducerRecord<String, String> producerRecord = new ProducerRecord<String, String>(topic, key, value);
if (sync) {
producer.send(producerRecord).get();
} else {
producer.send(producerRecord);
}
producer.close();
}
}
整个项目可通过以下链接获得：
答案 2 :(得分：1)
尝试将appender设置为async，如下所示： log4j.appender.KAFKA.ProducerType =异步
似乎是合理的，它进入无限循环，因为kafka生产者已经登录了自己。