我对Spring Boot有一个非常奇怪的问题,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.
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/ / ' __ _ () __ __ _
( ( )__ | '_ | '| | ' / ` |
/ )| |)| | | | | || (| | ) ) ) )
' || .__|| ||| |_,| / / / /
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:: 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来填充数据库模式和Spring引导版本1.5.2.你能分享一些提示进行调试吗？
所以,问题是,我正在使用log4.properties out of war文件.然后,当我开始这场战争时,它显示了非常好的信息,如下所示：
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,其中包含以下内容：
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的详细日志让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
嗯,我必须说,对于如何隐藏错误真是令人印象深刻.
