Spring boot 1.5.2 - Web 应用程序在加载徽标后停止？

Question

我的Spring Boot有个很奇怪的问题，我不知道为什么使用Spring Boot的web应用程序无法启动，即使我直接在终端上运行它也没有输出错误。

java -jar /var/lib/tomcat/webapps/rasdaman.war
log4j:WARN No appenders could be found for logger (org.springframework.web.context.support.StandardServletEnvironment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

. ____ _ __ _ _
/\ / ' __ _ () __ __ _ \ \ \ 
( ( )__ | '_ | '| | ' / ` | \ \ \ 
\/ )| |)| | | | | || (| | ) ) ) )
' || .__|| ||| |_, | / / / /
=========||==============|/=////
:: Spring Boot :: (v1.5.2.RELEASE)

[rasdaman@osboxes rasdaman]$ echo $?
1

这是应用程序类https://pastebin.com/rinWbp9z，这个Web 应用程序使用Liquibase 填充数据库模式和Spring boot version 1.5.2。你能分享一些调试提示吗？

Answer 1

所以，问题是，我使用 log4.properties out of war 文件。然后，当我开始这场战争时，它会显示非常好的这样的信息：

java -jar target/petascope_main/rasdaman.war
log4j:WARN No appenders could be found for logger (org.springframework.web.context.support.StandardServletEnvironment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.2.RELEASE)

Aug 28, 2017 6:00:31 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Tomcat
Aug 28, 2017 6:00:32 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.5.11
Aug 28, 2017 6:00:33 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring embedded WebApplicationContext
Aug 28, 2017 6:00:38 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Tomcat

然后，我在 src/main/resources 中添加了一个 log4j.properties 文件，内容如下：

log4j.rootLogger=debug, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%t %-5p %c{2} - %m%n

之后，我可以看到 Spring 的详细日志，它使 Tomcat 停止：

***************************
APPLICATION FAILED TO START
***************************

Description:

Field abstractHandler in org.rasdaman.ApplicationMain required a single bean, but 7 were found:
    - KVPRasqlServiceHandler: defined in URL [jar:file:/home/rasdaman/build/applications/petascope/target/petascope_main/rasdaman.war!/WEB-INF/classes!/petascope/controller/handler/service/KVPRasqlServiceHandler.class]
    - KVPWCPSServiceHandler: defined in URL [jar:file:/home/rasdaman/build/applications/petascope/target/petascope_main/rasdaman.war!/WEB-INF/classes!/petascope/controller/handler/service/KVPWCPSServiceHandler.class]
    - SOAPWCSServiceHandler: defined in URL [jar:file:/home/rasdaman/build/applications/petascope/target/petascope_main/rasdaman.war!/WEB-INF/classes!/petascope/controller/handler/service/SOAPWCSServiceHandler.class]
    - KVPWCSTServiceHandler: defined in URL [jar:file:/home/rasdaman/build/applications/petascope/target/petascope_main/rasdaman.war!/WEB-INF/classes!/petascope/controller/handler/service/KVPWCSTServiceHandler.class]
    - XMLWCSServiceHandler: defined in URL [jar:file:/home/rasdaman/build/applications/petascope/target/petascope_main/rasdaman.war!/WEB-INF/classes!/petascope/controller/handler/service/XMLWCSServiceHandler.class]
    - KVPWCSServiceHandler: defined in URL [jar:file:/home/rasdaman/build/applications/petascope/target/petascope_main/rasdaman.war!/WEB-INF/classes!/petascope/controller/handler/service/KVPWCSServiceHandler.class]
    - KVPWMSServiceHandler: defined in URL [jar:file:/home/rasdaman/build/applications/petascope/target/petascope_main/rasdaman.war!/WEB-INF/classes!/petascope/controller/handler/service/KVPWMSServiceHandler.class]


Action:

Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed

好吧，我必须说，如何隐藏错误真的令人印象深刻。

Answer 2

看来，你的 logback 配置是正确的！

当您配置 logback-spring.xml 之后，日志不会出现在控制台上。 相反，您需要转到您在 logback-spring.xml 文件中配置的 LOG_HOME 位置。

所有日志都将在文件中，而不是在控制台上。

如果这能解决您的问题，请告诉我。