获得大量“从多个位置扫描”的信息。简单泽西岛网页应用中的警告 [英] Getting a whole lot of "scanned from multiple locations" warnings in simple Jersey web app

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本文介绍了获得大量“从多个位置扫描”的信息。简单泽西岛网页应用中的警告的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

一段时间后回到Java，我正在尝试使用命令行在Java 8，Jersey 2.27和Jetty 9.4.9上使用简单的RESTful API。应用程序可以正常运行，但我会收到数百条警告：

  2018-04-27 01：17：24.845：警告：oeja.AnnotationParser：main：无法识别运行时asm版本，假设393216 
 2018-04-27 01：17：24.945：警告：oeja.AnnotationParser：qtp988458918-12：javax.el。从多个位置扫描ArrayELResolver：jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar ！/javax/el/ArrayELResolver.class,jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/el/ArrayELResolver.class 
 2018-04-27 01：17：24.949：警告：oeja.AnnotationParser：qtp988458918-12：javax.el.BeanELResolver $ BeanProperties从多个位置扫描：jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_ -any-8355640322316327743.dir / webapp / WEB-INF / lib / el-api-2.2.jar！/javax/el/BeanELResolver$BeanProperties.class,jar:file：///paste4j/deployment/jetty-runner-9.4 .9.v20180320.jar！/javax/el/BeanELResolver$BeanProperties.class 
 2018-04-27 01：17：24.952：警告：oeja.AnnotationParser：qtp988458918-12：javax.el.BeanELResolver $ BeanProperty从多个位置扫描：jar：file：///tmp/jetty-0.0。 0.0-8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / el-api-2.2.jar！/javax/el/BeanELResolver$BeanProperty.class,jar:file：/// paste4j / deployment / jetty-runner-9.4.9.v20180320.jar！/javax/el/BeanELResolver$BeanProperty.class 
 2018-04-27 01：17：24.954：警告：oeja.AnnotationParser：qtp988458918-12 ：javax.el.BeanELResolver从多个位置扫描：jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el- api-2.2.jar！/javax/el/BeanELResolver.class,jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/el/BeanELResolver.class 
 2018-04-27 01：17：24.959：警告：oeja.AnnotationParser：qtp988458918-12：javax.el.CompositeELResolver从多个位置扫描：jar：file：///tmp/jetty-0.0.0.0-8081-paste4j。战争-_-任何-8355640322316327743.dir / web应用/ WEB-IN F / lib / el-api-2.2.jar！/javax/el/CompositeELResolver.class,jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/ javax / el / CompositeELResolver .class 
 2018-04-27 01：17：24.961：警告：oeja.AnnotationParser：qtp988458918-12：从多个位置扫描的javax.el.E​​LContext：jar：file：///tmp/jetty-0.0。 0.0-8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / el-api-2.2.jar！/javax/el/ELContext.class,jar:file：/// paste4j / deployment / jetty-runner-9.4.9.v20180320.jar！/javax/el/ELContext.class 
 2018-04-27 01：17：24.962：WARN：oeja.AnnotationParser：qtp988458918-15：javax.annotation .Generated从多个位置扫描：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/Generated.class,jar：file：/// tmp / jetty- 0.0.0.0-8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/Generated.class 
 2018- 04-27 01：17：24.962：警告：oeja.AnnotationParser：qtp988458918-15：javax.annotation.ManagedB从多个位置扫描：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/ManagedBean.class,jar：file：///tmp/jetty-0.0 .0.0-8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/ManagedBean.class 
 2018-04 -27 01：17：24.962：警告：oeja.AnnotationParser：qtp988458918-15：从多个位置扫描的javax.annotation.PostConstruct：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar ！/javax/annotation/PostConstruct.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation -api-1.2.jar！/javax/annotation/PostConstruct.class 
 2018-04-27 01：17：24.963：警告：oeja.AnnotationParser：qtp988458918-15：javax.annotation.PreDestroy从多个位置扫描： jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/PreDestroy.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j -_-的.war任何-83556403223 16327743.dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/PreDestroy.class 
 2018-04-27 01：17：24.963：WARN：oeja.AnnotationParser ：qtp988458918-15：从多个位置扫描javax.annotation.Priority：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/Priority.class,jar：file ！///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar /使用javax /注解/优先.class 
 2018-04-27 01：17：24.963：警告：oeja.AnnotationParser：qtp988458918-15：javax.annotation.Resource $ AuthenticationType从多个位置扫描：jar：file：/// paste4j / deployment / jetty-runner-9.4.9.v20180320.jar！/javax/annotation/Resource$AuthenticationType.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743。 dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/Resource$AuthenticationType.class 
 2018-04-27 01：17：24.963：WARN：oeja.AnnotationParser ：qtp988458918-15 ：javax.annotation.Resource从多个位置扫描：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/Resource.class,jar：file：/// tmp / jetty-0.0.0.0-8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/Resource.class 
 2018-04-27 01：17：24.963：警告：oeja.AnnotationParser：qtp988458918-15：从多个位置扫描的javax.annotation.Resources：jar：file：///paste4j/deployment/jetty-runner-9.4。 9.v20180320.jar！/javax/annotation/Resources.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/ lib / javax.annotation-api-1.2.jar！/javax/annotation/Resources.class 
 2018-04-27 01：17：24.963：警告：oeja.AnnotationParser：qtp988458918-15：javax.annotation.security .DeclareRoles从多个位置扫描：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/security/DeclareRoles.class,jar:file：/// tmp /码头-0.0.0.0-8081  - 对aste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/security/DeclareRoles.class 
 2018-04-27 01 ：17：24.964：警告：oeja.AnnotationParser：qtp988458918-15：javax.annotation.security.DenyAll从多个位置扫描：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！ /javax/annotation/security/DenyAll.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax。 annotation-api-1.2.jar！/javax/annotation/security/DenyAll.class 
 2018-04-27 01：17：24.964：警告：oeja.AnnotationParser：qtp988458918-15：javax.annotation.security.PermitAll从多个位置扫描：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/security/PermitAll.class,jar：file：/// tmp / jetty- 0.0.0.0-8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/security/PermitAll.class 
 2018-04-27 01：17：24.964：警告：o eja.AnnotationParser：qtp988458918-15：javax.annotation.security.RolesAllowed从多个位置扫描：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/ javax / annotation / security / RolesAllowed.class，jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar ！/javax/annotation/security/RolesAllowed.class 
 2018-04-27 01：17：24.964：警告：oeja.AnnotationParser：qtp988458918-15：javax.annotation.security.RunAs从多个位置扫描：jar： file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/security/RunAs.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j .war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.annotation-api-1.2.jar！/javax/annotation/security/RunAs.class 
 2018-04-27 01： 17：24.964：警告：oeja.AnnotationParser：qtp988458918-15：从多个位置扫描的javax.annotation.sql.DataSourceDefinition：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v201 80320.jar！/javax/annotation/sql/DataSourceDefinition.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/ lib / javax.annotation-api-1.2.jar！/javax/annotation/sql/DataSourceDefinition.class 
 2018-04-27 01：17：24.965：WARN：oeja.AnnotationParser：qtp988458918-15：javax.annotation从多个位置扫描的.sql.DataSourceDefinitions：jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/annotation/sql/DataSourceDefinitions.class,jar:file：/// TMP /码头，0.0.0.0-8081-paste4j.war -_-任何-8355640322316327743.dir / web应用/ WEB-INF / lib目录/ javax.annotation中，API-1.2.jar！/javax/annotation/sql/DataSourceDefinitions.class 
 2018-04-27 01：17：24.962：警告：oeja.AnnotationParser：qtp988458918-12：javax.el.E​​LContextEvent从多个位置扫描：jar：file：///tmp/jetty-0.0.0.0- 8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / el-api-2.2.jar！/javax/el/ELContextEvent.class,jar:file：/// paste4j / deployment /码头 - 亚军9.4.9.v201 80320.jar！/javax/el/ELContextEvent.class 
 2018-04-27 01：17：24.966：警告：oeja.AnnotationParser：qtp988458918-12：javax.el.E​​LContextListener从多个位置扫描：jar：file ！///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar /javax/el/ELContextListener.class ，jar：file：///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar！/javax/el/ELContextListener.class 
 2018-04-27 01：17：24.966：警告：oeja .AnnotationParser：qtp988458918-17：javax.inject.Inject从多个位置扫描：jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB- INF / lib / javax.inject-1.jar！/javax/inject/Inject.class,jar：file：///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/ webapp / WEB-INF / lib / javax.inject-2.5.0-b42.jar！/javax/inject/Inject.class 
 2018-04-27 01：17：24.966：警告：oeja.AnnotationParser：qtp988458918 -17：javax.inject.Named从多个位置扫描：jar：file：///tmp/jetty-0.0.0.0-8081-pas te4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.inject-1.jar！/javax/inject/Named.class,jar：file：///tmp/jetty-0.0。 0.0-8081-paste4j.war -_- any-8355640322316327743.dir / webapp / WEB-INF / lib / javax.inject-2.5.0-b42.jar！/javax/inject/Named.class

我从中提取了 jaxrs-ri-2.27.zip 的内容



java版本（ sudo apt install openjdk-8 -jdk ）：

  $ java -version 
 openjdk version9-internal 
 OpenJDK运行时环境（build 9-internal + 0-2016-04-14-195246.buildd.src）
 OpenJDK 64位服务器VM（内置9-internal + 0-2016-04-14 -195246.buildd.src，混合模式）

应用程序在我调用它时可以正常工作 - 但不是确定这些警告是否可以安全忽略？：

  $ curl localhost：8081 / rest / hello 
你好


解决方案

那里有重复项。由于OSGI，泽西岛以其自己的罐子重新包装类而闻名。如果你不使用和理解像我这样的OSGI，这很糟糕。我不知道所有这些，但例如javax.inject-1和javax.inject-2.5.0-b42是相同的。大多数人使用maven这是一种更好的方式来管理依赖关系（但需要陡峭的学习曲线），然后将从球衣中排除重新包装的一个，如：

 < dependency> 
< groupId> org.glassfish.jersey.containers< / groupId> 
< artifactId> jersey-container-servlet< / artifactId> 
< exclusions> 
< exclusion><！ - 排除此重新打包的javax.inject。 - > 
< groupId> org.glassfish.hk2.external< / groupId> 
< artifactId> javax.inject< / artifactId> 
< / exclusion> 
< / exclusions> 
< / dependency> 
< dependency> 
< groupId> org.glassfish.jersey.inject< / groupId> 
< artifactId> jersey-hk2< / artifactId> 
< exclusions> 
< exclusion><！ - 排除此重新打包的javax.inject。 - > 
< groupId> org.glassfish.hk2.external< / groupId> 
< artifactId> javax.inject< / artifactId> 
< / exclusion> 
< / exclusions> 
< / dependency>

但在你的情况下，只是尝试删除javax.inject-2.5.0-b42，看看你是否不再对这些类发出警告：



你必须找出重复项其他警告也是如此。对我来说这有点容易，因为我使用maven和netbeans中的依赖图来查找重复项。希望这不会毁了你回归Java。


Getting back to Java after some time, and I'm trying to get a simple RESTful API going on with Java 8, Jersey 2.27 and Jetty 9.4.9 using the command line. The app does work, but I keep getting hundreds of warnings like:

2018-04-27 01:17:24.845:WARN:oeja.AnnotationParser:main: Unrecognized runtime asm version, assuming 393216
2018-04-27 01:17:24.945:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.ArrayELResolver scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/ArrayELResolver.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/ArrayELResolver.class
2018-04-27 01:17:24.949:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.BeanELResolver$BeanProperties scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/BeanELResolver$BeanProperties.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/BeanELResolver$BeanProperties.class
2018-04-27 01:17:24.952:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.BeanELResolver$BeanProperty scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/BeanELResolver$BeanProperty.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/BeanELResolver$BeanProperty.class
2018-04-27 01:17:24.954:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.BeanELResolver scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/BeanELResolver.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/BeanELResolver.class
2018-04-27 01:17:24.959:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.CompositeELResolver scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/CompositeELResolver.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/CompositeELResolver.class
2018-04-27 01:17:24.961:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.ELContext scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/ELContext.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/ELContext.class
2018-04-27 01:17:24.962:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.Generated scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/Generated.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/Generated.class
2018-04-27 01:17:24.962:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.ManagedBean scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/ManagedBean.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/ManagedBean.class
2018-04-27 01:17:24.962:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.PostConstruct scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/PostConstruct.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/PostConstruct.class
2018-04-27 01:17:24.963:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.PreDestroy scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/PreDestroy.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/PreDestroy.class
2018-04-27 01:17:24.963:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.Priority scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/Priority.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/Priority.class
2018-04-27 01:17:24.963:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.Resource$AuthenticationType scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/Resource$AuthenticationType.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/Resource$AuthenticationType.class
2018-04-27 01:17:24.963:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.Resource scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/Resource.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/Resource.class
2018-04-27 01:17:24.963:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.Resources scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/Resources.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/Resources.class
2018-04-27 01:17:24.963:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.security.DeclareRoles scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/security/DeclareRoles.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/security/DeclareRoles.class
2018-04-27 01:17:24.964:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.security.DenyAll scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/security/DenyAll.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/security/DenyAll.class
2018-04-27 01:17:24.964:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.security.PermitAll scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/security/PermitAll.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/security/PermitAll.class
2018-04-27 01:17:24.964:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.security.RolesAllowed scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/security/RolesAllowed.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/security/RolesAllowed.class
2018-04-27 01:17:24.964:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.security.RunAs scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/security/RunAs.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/security/RunAs.class
2018-04-27 01:17:24.964:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.sql.DataSourceDefinition scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/sql/DataSourceDefinition.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/sql/DataSourceDefinition.class
2018-04-27 01:17:24.965:WARN:oeja.AnnotationParser:qtp988458918-15: javax.annotation.sql.DataSourceDefinitions scanned from multiple locations: jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/annotation/sql/DataSourceDefinitions.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.annotation-api-1.2.jar!/javax/annotation/sql/DataSourceDefinitions.class
2018-04-27 01:17:24.962:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.ELContextEvent scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/ELContextEvent.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/ELContextEvent.class
2018-04-27 01:17:24.966:WARN:oeja.AnnotationParser:qtp988458918-12: javax.el.ELContextListener scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/el-api-2.2.jar!/javax/el/ELContextListener.class, jar:file:///paste4j/deployment/jetty-runner-9.4.9.v20180320.jar!/javax/el/ELContextListener.class
2018-04-27 01:17:24.966:WARN:oeja.AnnotationParser:qtp988458918-17: javax.inject.Inject scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.inject-1.jar!/javax/inject/Inject.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.inject-2.5.0-b42.jar!/javax/inject/Inject.class
2018-04-27 01:17:24.966:WARN:oeja.AnnotationParser:qtp988458918-17: javax.inject.Named scanned from multiple locations: jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.inject-1.jar!/javax/inject/Named.class, jar:file:///tmp/jetty-0.0.0.0-8081-paste4j.war-_-any-8355640322316327743.dir/webapp/WEB-INF/lib/javax.inject-2.5.0-b42.jar!/javax/inject/Named.class

I have extracted the contents of jaxrs-ri-2.27.zip from https://jersey.github.io/download.html into the project WEB-INF\lib\ directory, so that all JAR files from the ZIP are in the same directory.

Then I compile it with:

# In project root
javac -classpath "WEB-INF/lib/*" WEB-INF/classes/com/paste/ws/*.java
jar -cvf paste4j.war WEB-INF/*

And finally attempt to run it with:

java -jar deployment/jetty-runner-9.4.9.v20180320.jar --port 8081 paste4j.war

But at that point, those warnings start to appear. What am I doing wrong?

Here's the files I have:

WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    id="WebApp_ID"
    version="3.1">
    <servlet>
        <servlet-name>rest</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>com.paste.ws.MyApplication</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>rest</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>
</web-app>

WEB-INF/classes/com/paste/ws/MyApplication.java

package com.paste.ws;

import org.glassfish.jersey.server.ResourceConfig;

public class MyApplication extends ResourceConfig {
    public MyApplication() {
        packages("com.paste.ws");
    }
}

WEB-INF/classes/com/paste/ws/PasteResource.java

package com.paste.ws;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/hello")
public class PasteResource {
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String getMessage() {
        return "Hello there";
    }
}

And the structure:

The java version (sudo apt install openjdk-8-jdk):

$ java -version
openjdk version "9-internal"
OpenJDK Runtime Environment (build 9-internal+0-2016-04-14-195246.buildd.src)
OpenJDK 64-Bit Server VM (build 9-internal+0-2016-04-14-195246.buildd.src, mixed mode)

The app does work when I call it - but not sure if those warnings are safe to ignore?:

$ curl localhost:8081/rest/hello
Hello there

解决方案

There are duplicates in there. Jersey is known for repackaging classes in it's own jars because of OSGI. Which sucks if you don't use and understand OSGI like me. I don't know all of them but for example javax.inject-1 and javax.inject-2.5.0-b42 are the same. Most people use maven which is a better way to manage dependencies (but a steep learning curve to get into) and then would exclude the repackaged one from jersey like:

   <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <exclusions>
            <exclusion><!-- Exclude this repackaged javax.inject. -->
                <groupId>org.glassfish.hk2.external</groupId>
                <artifactId>javax.inject</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.inject</groupId>
        <artifactId>jersey-hk2</artifactId>
        <exclusions>
            <exclusion><!-- Exclude this repackaged javax.inject. -->
                <groupId>org.glassfish.hk2.external</groupId>
                <artifactId>javax.inject</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

But in your case just try to remove javax.inject-2.5.0-b42 and see if you get no more warnings for these classes:

You'll have to figure out the duplicates for the other warnings too. For me it was a little easier because I used maven and the dependency graph in netbeans to find duplicates. Hope this didn't ruin your return to Java.

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