log4j.properties 已加載但未使用 Weblogic 12c

Question

我在 weblogic 12c 上部署了一個 war 文件（web 服務），它讀取 log4j.properties 文件但不使用它。 下面是應用程序啟動時 log4j 的調試，顯示了文件的解析和設置，但日志沒有寫入指定的日志文件，標准輸出中的日志與指定的模式和配置的級別不匹配。

log4j: Reading configuration from URL file:////weblogic/apps/config/ws/log4j.properties
log4j: Parsing for [root] with value=[WARN, stdout, wslogfile].
log4j: Level token is [WARN].
log4j: Category root set to WARN
log4j: Parsing appender named "stdout".
log4j: Parsing layout options for "stdout".
log4j: Setting property [conversionPattern] to [%d %6.6p [%30.30c{1}][%10.10t] %m%n].
log4j: End of parsing for "stdout".
log4j: Parsed "stdout" options.
log4j: Parsing appender named "wslogfile".
log4j: Parsing layout options for "wslogfile".
log4j: Setting property [conversionPattern] to [%d %6.6p [%30.30c{1}][%10.10t] %m%n].
log4j: End of parsing for "wslogfile".
log4j: Setting property [file] to [/weblogic/apps/logs/ws.log].
log4j: Setting property [datePattern] to ['.'yyyy-MM-dd].
log4j: setFile called: /weblogic/apps/logs/ws.log, true
log4j: setFile ended
log4j: Appender [wslogfile] to be rolled at midnight.
log4j: Parsed "wslogfile" options.
log4j: Parsing for [com.app] with value=[DEBUG, stdout, wslogfile].
log4j: Level token is [DEBUG].
log4j: Category com.app set to DEBUG
log4j: Parsing appender named "stdout".
log4j: Appender "stdout" was already parsed.
log4j: Parsing appender named "wslogfile".
log4j: Appender "wslogfile" was already parsed.
log4j: Handling log4j.additivity.com.app=[false]
log4j: Setting additivity for "com.app" to false
log4j: Parsing for [com.comp] with value=[DEBUG, stdout, wslogfile].
log4j: Level token is [DEBUG].
log4j: Category com.comp set to DEBUG
log4j: Parsing appender named "stdout".
log4j: Appender "stdout" was already parsed.
log4j: Parsing appender named "wslogfile".
log4j: Appender "wslogfile" was already parsed.
log4j: Handling log4j.additivity.com.comp=[false]
log4j: Setting additivity for "com.comp" to false
log4j: Parsing for [org.springframework.ws.server.MessageTracing.received] with value=[TRACE, stdout, wslogfile].
log4j: Level token is [TRACE].
log4j: Category org.springframework.ws.server.MessageTracing.received set to TRACE
log4j: Parsing appender named "stdout".
log4j: Appender "stdout" was already parsed.
log4j: Parsing appender named "wslogfile".
log4j: Appender "wslogfile" was already parsed.
log4j: Handling log4j.additivity.org.springframework.ws.server.MessageTracing.received=[false]
log4j: Setting additivity for "org.springframework.ws.server.MessageTracing.received" to false
log4j: Finished configuring.

我的 log4j.properties 如下 log4j.rootLogger=WARN, stdout, wslogfile

log4j.logger.com.app=DEBUG, stdout, wslogfile
log4j.additivity.com.app=false

log4j.logger.com.comp=DEBUG, stdout, wslogfile
log4j.additivity.com.comp=false

log4j.logger.org.springframework.ws.server.MessageTracing.received=TRACE, stdout, wslogfile
log4j.additivity.org.springframework.ws.server.MessageTracing.received=false

log4j.appender.wslogfile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.wslogfile.File=/weblogic/apps/logs/ws.log
log4j.appender.wslogfile.DatePattern='.'yyyy-MM-dd
log4j.appender.wslogfile.layout=org.apache.log4j.PatternLayout
log4j.appender.wslogfile.layout.ConversionPattern=%d %6.6p [%30.30c{1}][%10.10t] %m%n

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %6.6p [%30.30c{1}][%10.10t] %m%n

日志樣本 output（僅顯示在標准輸出中）

Sep 28, 2022 11:42:17 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'spring-ws': initialization started
Sep 28, 2022 11:42:17 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'spring-ws-servlet': startup date [Wed Sep 28 11:42:17 AST 2022]; root of context hierarchy
Sep 28, 2022 11:42:17 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/spring-ws-servlet.xml]
Sep 28, 2022 11:42:17 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/service-context.xml]
Sep 28, 2022 11:42:18 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/stmt-client-context.xml]

我的 pom.xml 如下

    <!-- Logging with SLF4J & LogBack -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.12</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>jcl-over-slf4j</artifactId>
        <version>1.7.12</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.12</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.14</version>
    </dependency>

Answer 1

因此，通過更新 war 文件下的 weblogic.xml 文件以指定 log4j.properties 的“prefer-application-packages”解決了這個問題，如下所示

<?xml version='1.0' encoding='UTF-8'?>
<weblogic-web-app xmlns="http://xmlns.oracle.com/weblogic/weblogic-web-app" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.oracle.com/weblogic/weblogic-web-app http://xmlns.oracle.com/weblogic/weblogic-web-app/1.3/weblogic-web-app.xsd">
    <session-descriptor/>
    <jsp-descriptor/>
    <container-descriptor>
        <prefer-application-packages>
            <package-name>org.apache.commons.*</package-name>
            <package-name>org.slf4j.*</package-name>
        </prefer-application-packages>
    </container-descriptor>
    <context-root>test-context-root</context-root>
</weblogic-web-app>