log4j：WARN找不到记录器的附加程序（org.apache.commons.beanutils.converters.BooleanConverter）

Question

我知道这个问题一直在出现，但我完全感到困惑。

我正在尝试使用Log4j2编写一个KafkaStreams应用程序日志记录，并且我收到有关没有附加程序的Log4j（版本1）警告：

log4j:WARN No appenders could be found for logger (org.apache.commons.beanutils.converters.BooleanConverter).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

而且标准的答案是在pom文件中添加一个排除项，但我已经做过一次又一次没有成功。

它甚至变得更奇怪，因为即使警告可能提示common-beanutils，导致控制台输出错误的行也是如此：

        final Map<String, String> serdeConfig = Collections.singletonMap(
            AbstractKafkaAvroSerDeConfig.SCHEMA_REGISTRY_URL_CONFIG,
            ApplicationConfiguration.SCHEMA_REGISTRY_HOSTS);

我花了整整一整天的时间，似乎根本没有取得任何进展。

今天过后，我的pom文件杂乱无章，我的依赖项看起来像这样。

    <dependencies>

    <!--Configuration Dependency for importing properties file-->
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-configuration2</artifactId>
        <version>2.2</version>
        <!--Excluded in Map-->
        <exclusions>
            <exclusion>
                <artifactId>commons-logging</artifactId>
                <groupId>commons-logging</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Dependency used for Apache commons configuration2-->
    <dependency>
        <groupId>commons-beanutils</groupId>
        <artifactId>commons-beanutils</artifactId>
        <version>1.9.3</version>
        <exclusions>
            <exclusion>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
            <!--Excluded in Map-->
            <exclusion>
                <artifactId>commons-logging</artifactId>
                <groupId>commons-logging</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Log4j2 Dependency for logging-->
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.11.0</version>
    </dependency>

    <!--Required for Log4j2 Dependency for logging-->
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.11.0</version>
    </dependency>

    <!--Used for Object Json Serialization and Deserialization-->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.9.6</version>
    </dependency>

    <!--Sumo Logic Dependency for Log4j2 logging-->
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.2</version>
        <exclusions>
            <exclusion>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
            <!--Excluded in Map-->
            <exclusion>
                <artifactId>commons-logging</artifactId>
                <groupId>commons-logging</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Confluent Platform Dependency for streams avro serializer-->
    <dependency>
        <groupId>io.confluent</groupId>
        <artifactId>kafka-streams-avro-serde</artifactId>
        <version>3.3.0</version>
        <!--Required due to SLF4j dependency conflict-->
        <exclusions>
            <exclusion>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
            <!--Excluded in Map-->
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Confluent Platform Dependency for avro serializer-->
    <dependency>
        <groupId>io.confluent</groupId>
        <artifactId>kafka-avro-serializer</artifactId>
        <version>3.3.0</version>
        <!--Excluded in Map-->
        <exclusions>
            <exclusion>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
            <exclusion>
                <artifactId>commons-logging</artifactId>
                <groupId>commons-logging</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Confluent Platform Dependency for schema registry-->
    <dependency>
        <groupId>io.confluent</groupId>
        <artifactId>kafka-schema-registry-client</artifactId>
        <version>3.3.0</version>
        <!--Required due to SLF4j dependency conflict-->
        <exclusions>
            <exclusion>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Kafka API Client Dependency-->
    <dependency>
        <groupId>org.apache.kafka</groupId>
        <artifactId>kafka-clients</artifactId>
        <version>1.1.0</version>
        <!--Excluded in Map-->
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Kafka Streams API Client Dependency-->
    <dependency>
        <groupId>org.apache.kafka</groupId>
        <artifactId>kafka-streams</artifactId>
        <version>1.1.0</version>
        <!--Excluded in Map-->
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Avro Serialization Dependency-->
    <dependency>
        <groupId>org.apache.avro</groupId>
        <artifactId>avro</artifactId>
        <version>1.8.2</version>
        <!--Excluded in Map-->
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Avro pojo class generation Dependency-->
    <dependency>
        <groupId>org.apache.avro</groupId>
        <artifactId>avro-maven-plugin</artifactId>
        <version>1.8.2</version>
        <!--Excluded in Map-->
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>

    <!--Avro Serialization Dependency-->
    <dependency>
        <groupId>org.apache.avro</groupId>
        <artifactId>avro-tools</artifactId>
        <version>1.8.2</version>
        <!--Excluded in Map-->
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
            <exclusion>
                <artifactId>commons-logging</artifactId>
                <groupId>commons-logging</groupId>
            </exclusion>
        </exclusions>
    </dependency>

</dependencies>

而且我已经从依赖关系图中排除了与slf4j相关的任何内容，甚至在这一点上也没有进行日志记录，当前如下所示：

我的应用程序日志记录正在按预期方式工作（Console和RolingFileAppender），但我似乎无法消除这种顽固的警告。

感谢大家在这里阅读我的小书； 特别是如果您有任何建议！

Answer 1

最终，我从上面的评论中选择了选项2。

这样做的原因是，最后，通过源代码管理中的其他文件，使日志消息最少并在生产中保持清晰似乎更为重要。 此外，单独的log4j配置文件的第二个选项使我可以轻松地从依赖项中轻松打开其他调试详细信息（如果我曾经需要过），例如我的KStreams应用程序似乎无法按预期工作，我很困惑。

具体来说，我实际上创建了两个版本的log4j配置，以便与其他配置/属性一样，本地和（令牌化）发行版具有不同的配置，如下所示：

$ ls src/main/resources/*/*.xml
src/main/resources/local/log4j.xml*   src/main/resources/release/log4j.xml*
src/main/resources/local/log4j2.xml*  src/main/resources/release/log4j2.xml*

然后，我像平常一样设置log4j.xml，但默认情况下将根记录器级别关闭，因此除非更改，否则它将使日志静默，如下所示：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="false">

    <appender name="MyConsoleAppender" class="org.apache.log4j.ConsoleAppender">
        <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>

    <appender name="MyRollingFileAppender" class="org.apache.log4j.RollingFileAppender">
        <param name="append" value="true" />
        <param name="maxFileSize" value="100MB" />
        <param name="maxBackupIndex" value="10" />
        <param name="file" value="c:\\Logs\\KStreamsApp\\Dependencies\\KStreamsAppDependencies.log" />
        <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>

    <root>
        <level value="Off" />
        <appender-ref ref="MyConsoleAppender" />
        <appender-ref ref="MyRollingFileAppender" />
    </root>

</log4j:configuration>