如何使IntelliJ IDEA加载org.slf4j.impl.StaticLoggerBinder以便运行Kafka? [英] How to make IntelliJ IDEA load org.slf4j.impl.StaticLoggerBinder in order to run Kafka?

问题描述

我想从IDEA运行Kafka，但出现以下错误:

 >任务:core:Kafka.main()SLF4J:无法加载类"org.slf4j.impl.StaticLoggerBinder".SLF4J:默认为无操作(NOP)记录器实现SLF4J:有关更多详细信息，请参见http://www.slf4j.org/codes.html#StaticLoggerBinder.SLF4J:无法加载类"org.slf4j.impl.StaticMDCBinder".SLF4J:默认为不操作MDCAdapter实现.SLF4J:有关更多详细信息，请参见http://www.slf4j.org/codes.html#no_static_mdc_binder.>任务:core:Kafka.main()失败任务':core:Kafka.main()'的执行失败.>进程'command'/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/bin/java''完成，退出值非零* 尝试:使用--stacktrace选项运行以获取堆栈跟踪.使用--info或--debug选项运行，以获取更多日志输出.与--scan一起运行以获取完整的见解. 

我可以从终端运行Kafka.我从终端运行Zookeeper，然后从IDEA运行Kafka.

运行Kafka的步骤

像往常一样，我使用终端运行命令 ./gradlew jar 从源代码构建Kafka.我从克隆存储库的根目录中使用 idea.在IDEA中打开项目.

我打开了文件: core/src/main/scala/kafka/Kafka.scala

然后，我导航到 main()函数，然后单击绿色三角形.

这可以帮助我获取运行"配置，但失败.然后，在程序参数中添加 config/server.properties ，以使运行"配置如下所示:

使用上述配置运行时，出现上述错误.

我进行了一些搜索，发现通过添加依赖项可以解决相同的问题，例如提到的

这是我在终端上运行Kafka时发现的东西:

  SLF4J:类路径包含多个SLF4J绑定.SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/core/build/dependant-libs-2.13.5/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder中找到绑定.班级]SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/tools/build/dependant-libs-2.13.5/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder中找到绑定.班级]SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/api/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder.class]中找到绑定SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/transforms/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder.class]中找到绑定SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/runtime/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder.class]中找到绑定SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/file/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder.class]中找到绑定SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/mirror/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder.class]中找到绑定SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/mirror-client/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder中找到绑定.班级]SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/json/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/StaticLoggerBinder.class]中找到绑定SLF4J:在[jar:file:/Users/aviralsrivastava/dev/kafka/connect/basic-auth-extension/build/dependant-libs/slf4j-log4j12-1.7.30.jar！/org/slf4j/impl/[StaticLoggerBinder.class]SLF4J:有关说明，请参见http://www.slf4j.org/codes.html#multiple_bindings.SLF4J:实际绑定的类型为[org.slf4j.impl.Log4jLoggerFactory][2021-03-23 10:54:59,524]信息已注册kafka:type = kafka.Log4jController MBean(kafka.utils.Log4jControllerRegistration $) 

从倒数第二行开始，推导依赖项名称，并将其添加为最后一个图像所示.

解决方案

通常来说，需要正确配置类路径，以隔离单个Slf4j实现(特别是核心模块中的一个)，但是应该弄乱构建脚本避免在模块内修复运行时依赖项

要修复您的记录器，您需要将 -Dlog4j.configuration = config/log4j.properties 作为VM选项传递(我认为您必须在下拉菜单中将其显示为 -cp kafka.core.main 以显示该输入)

如果要模拟服务器的实际运行时行为，并附加调试器，请设置断点，然后打开一个终端(假设您正在使用Zookeeper，并且它已经在其他地方运行了，否则您需要一个新的终端))

  export KAFKA_DEBUG = y导出DEBUG_SUSPEND_FLAG = ybin/kafka-server-start config/server.properties 

然后为远程应用程序添加运行配置，并将其附加到端口5005

一旦附加，断点就应该成为焦点，并且您可以单步执行代码

I want to run Kafka from IDEA and I am getting the following error:

> Task :core:Kafka.main()
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.
SLF4J: Failed to load class "org.slf4j.impl.StaticMDCBinder".
SLF4J: Defaulting to no-operation MDCAdapter implementation.
SLF4J: See http://www.slf4j.org/codes.html#no_static_mdc_binder for further details.

> Task :core:Kafka.main() FAILED

Execution failed for task ':core:Kafka.main()'.
> Process 'command '/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

I am able to run Kafka from the terminal. I run Zookeeper from terminal and then Run Kafka from IDEA.

Steps that I follow to run Kafka

As usual, I run the command ./gradlew jar to build Kafka from the source, using the terminal. I open the project in IDEA using idea . from the root directory of the cloned repository.

I opened the file: core/src/main/scala/kafka/Kafka.scala

I then navigate to main() function and click on the green triangle.

This helps me get the Run configurations and it fails. I then add the config/server.properties in the Program Arguments to make the Run config look like this:

Upon running with the above configurations, I get the aforementioned error.

I searched a bit and found that the same issue was resolved by adding dependencies, like mentioned here and here but I could not understand how I can add dependency as I do not use Maven and I cannot find the file pom.xml file as described here.

Update 1

I tried to add the exact dependency as stated from the terminal to the Run configurations, I am unsure whether that is added or not because the result is still the same:

This is what I find when I run Kafka from the terminal:

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/core/build/dependant-libs-2.13.5/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/tools/build/dependant-libs-2.13.5/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/api/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/transforms/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/runtime/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/file/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/mirror/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/mirror-client/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/json/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/aviralsrivastava/dev/kafka/connect/basic-auth-extension/build/dependant-libs/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
[2021-03-23 10:54:59,524] INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)

From the second last line, I deduced the dependency name and added it as shown in the last image.

解决方案

Generally speaking, the classpath needs configured correctly, to isolate a single Slf4j implementation (the one in the core module, specifically), but messing with the build scripts should be avoided to fix your runtime dependencies within a module

To fix your logger, you need to pass in -Dlog4j.configuration=config/log4j.properties as a VM option (I think you'll have to toggle the drop-down where it says -cp kafka.core.main to get that input to show)

If you want to emulate actual runtime behavior of the server, and attach a debugger, setup your breakpoints, open a terminal (assuming you are using Zookeeper, and it is already running somewhere else, otherwise you need a new terminal for it)

export KAFKA_DEBUG=y
export DEBUG_SUSPEND_FLAG=y

bin/kafka-server-start config/server.properties 

Then add a run configuration for a remote application and attach it to port 5005

Once it attaches, your breakpoint should take focus, and you can step through the code

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