Please refer to the Spark official online documentation for SET Command ## Logging Kyuubi uses log4j for logging. You can configure it using $KYUUBI_HOME/conf/log4j.properties. # Licensed to the Apache f1999408/p97_2.jpg) #### 6.6.1 Monitoring Kyuubi - Logging System Kyuubi uses Apache Log4j for logging. In general, there are mainly three components in the Kyuubi architecture that will produce KYUUBI_MAX_LOG_FILES controls how many log files will be remained after a Kyuubi server reboot. ## Custom Log4j Settings Taking control of $KYUUBI_HOME/conf/log4j.properties will also give us the ability of customizing

1. Configure Logback for logging ..... 163 66.2. Configure Log4j for logging ..... 164 Use YAML or JSON to configure Log4j 2 ..... 164 67. Data Access ..... 165 67.1. Configure a DataSource Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Support the Log4j logging framework.| |spring-boot-starter-logging|Import Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file

1. Configure Logback for logging ..... 163 66.2. Configure Log4j for logging ..... 164 Use YAML or JSON to configure Log4j 2 ..... 164 67. Data Access ..... 165 67.1. Configure a DataSource Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Support the Log4j logging framework.| |spring-boot-starter-logging|Import Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file

Configure Logback for logging ..... 163 66.2. Configure Log4j for logging ..... 164 Use YAML or JSON to configure Log4j 2 ..... 164 67. Data Access ..... 165 67.1. Configure a Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Support the Log4J logging framework.| |spring-boot-starter-logging|Import Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file

Customize ViewResolvers 66. Logging Configure Logback for logging Configure Log4j for logging Use YAML or JSON to configure Log4j 2 67. Data Access Configure a DataSource Configure Two DataSources Use Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Support the Log4J logging framework.| |spring-boot-starter-logging|Import Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file

Configure Logback for logging ..... 163 66.2. Configure Log4j for logging ..... 164 Use YAML or JSON to configure Log4j 2 ..... 164 67. Data Access ..... 165 67.1. Configure a Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Supports the Log4j logging framework.| |spring-boot-starter-logging|Imports Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file

StringNot setlogImpl指定 MyBatis 所用日志的具体实现，未指定时将自动查SLF4J | LOG4J | LOG4J2 | IDK LOGGING |Not set ## 一 个配置完整的 settings 元素的示例如下： Logging XML配置 XML映射文件 动态SQL Java API 日志 • Apache Commons Logging SLF4J SQL语句构建器 • Log4j 2 项目文档 项目信息 • Log4j 项目报表 具体选择哪个日志实现工具由MyBatis的内置日志工厂确定。它会使用最先找到的（按上文列举的顺序查找）。如果一个都未找到，日志功能就会被禁用。 • JDK 。这将意味着，在诸如WebSphere的环境中——WebSphere提供了Commons Logging的私有实现，你的Log4j配置将被忽略。这种做法不免让人悲催，MyBatis怎么能忽略你的配置呢？事实上，因Commons Logging已经存在了，按照优先级顺序，Log4j自然就被忽略了！不过，如果你的应用部署在一个包含Commons Logging的环境，而你又想用其他的日志框架，你可以根据需要调用如下的某一方法：

ViewResolvers 66. Logging Configure Logback for logging Configure Log4j for logging Use YAML or JSON to configure Log4j 2 67. Data Access Configure a DataSource Configure Two Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Supports the Log4J logging framework.| |spring-boot-starter-logging|Imports Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file

ViewResolvers 66. Logging Configure Logback for logging Configure Log4j for logging Use YAML or JSON to configure Log4j 2 67. Data Access Configure a DataSource Configure Two Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Supports the Log4J logging framework.| |spring-boot-starter-logging|Imports Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file

ViewResolvers 66. Logging Configure Logback for logging Configure Log4j for logging Use YAML or JSON to configure Log4j 2 67. Data Access Configure a DataSource Configure Two Jetty HTTP engine (to be used as an alternative to Tomcat).| |spring-boot-starter-log4j|Supports the Log4J logging framework.| |spring-boot-starter-logging|Imports Spring Boot's default logging framework the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file