java Kafka：如何启用客户端日志记录？
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Kafka: How do I enable client logging?
提问by Mark Harrison
When I instantiate a Kafka consumer
当我实例化一个 Kafka 消费者时
KafkaConsumer<String,String> consumer = new KafkaConsumer<String,String>(props);
I get this message
我收到这条消息
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
How do I enable logging for my client program?
如何为我的客户端程序启用日志记录？
回答by Mark Harrison
Add this property file src/main/resources/log4j.propertiesto your project:
将此属性文件添加src/main/resources/log4j.properties到您的项目中：
$ cat src/main/resources/log4j.properties
# Root logger option
log4j.rootLogger=DEBUG, stdout
# Direct log messages to stdout
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
This will enable logging. You can then set the standard options such as debug level, output format, etc, as per the logging documentation.
这将启用日志记录。然后，您可以根据日志记录文档设置标准选项，例如调试级别、输出格式等。
