Springboot+Logback日志配置，异常情况记录

logback配置

1.application .properties

# 日志打印信息配置
logging.config=classpath:logback-spring.xml

2.logback-spring.xml

<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <contextName>logbackcontextName>

    
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%npattern>
        encoder>
    appender>

    <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
        
        <file>./logs/gf_scanning.logfile>
        
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            
            <fileNamePattern>./logs/gf_scanning.%d{yyyy-MM-dd}.%i.logfileNamePattern>
            
            <maxHistory>30maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>10MBmaxFileSize>
            timeBasedFileNamingAndTriggeringPolicy>
        rollingPolicy>
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%npattern> 
        encoder>
    appender>


    <root level="info">
        <appender-ref ref="console"/>
        <appender-ref ref="file"/>
    root>

configuration>

异常情况

遇到个奇怪的问题，按上述配置完成logback的配置后，大多项目可以正常运行并保存日志到文件，但有一个项目启动时报错。java.lang.IllegalStateException: Could not initialize Logback logging from classpath:logback-spring.xml ... Caused by: ch.qos.logback.core.joran.spi.JoranException: Parser configuration error occurred

Logging system failed to initialize using configuration from 'classpath:logback-spring.xml'
java.lang.IllegalStateException: Could not initialize Logback logging from classpath:logback-spring.xml
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:168)
	at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:66)
	at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:57)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:132)
	at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:316)
	at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:282)
	at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:240)
	at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:216)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
	at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:339)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:297)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
	at cn.piesat.ScanningApplication.main(ScanningApplication.java:18)
Caused by: ch.qos.logback.core.joran.spi.JoranException: Parser configuration error occurred
	at ch.qos.logback.core.joran.event.SaxEventRecorder.buildSaxParser(SaxEventRecorder.java:89)
	at ch.qos.logback.core.joran.event.SaxEventRecorder.recordEvents(SaxEventRecorder.java:57)
	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:151)
	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:110)
	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:53)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.configureByResourceUrl(LogbackLoggingSystem.java:188)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:165)
	... 22 more
Caused by: org.xml.sax.SAXNotSupportedException: Feature: http://xml.org/sax/features/external-general-entities
	at org.apache.crimson.parser.XMLReaderImpl.setFeature(XMLReaderImpl.java:211)
	at org.apache.crimson.jaxp.SAXParserImpl.setFeatures(SAXParserImpl.java:143)
	at org.apache.crimson.jaxp.SAXParserImpl.(SAXParserImpl.java:126)
	at org.apache.crimson.jaxp.SAXParserFactoryImpl.newSAXParserImpl(SAXParserFactoryImpl.java:113)
	at org.apache.crimson.jaxp.SAXParserFactoryImpl.setFeature(SAXParserFactoryImpl.java:141)
	at ch.qos.logback.core.joran.event.SaxEventRecorder.buildSaxParser(SaxEventRecorder.java:82)
	... 28 more
Disconnected from the target VM, address: '127.0.0.1:64222', transport: 'socket'

Process finished with exit code 1

可能是由于jar包冲突，在pom文件中单独引入logback-core的依赖后，问题解决。

<dependency>
    <groupId>ch.qos.logbackgroupId>
    <artifactId>logback-coreartifactId>
    <version>1.1.7version>
dependency>
<dependency>
    <groupId>ch.qos.logbackgroupId>
    <artifactId>logback-classicartifactId>
    <version>1.1.7version>
    <exclusions>
        <exclusion>
            <groupId>ch.qos.logbackgroupId>
            <artifactId>logback-coreartifactId>
        exclusion>
    exclusions>
dependency>