Jersey 异常仅在依赖组合成单个 jar 时抛出 [英] Jersey exception only thrown when depencencies assembled into a single jar
问题描述
我正在编写一个嵌入 Jetty 和 Jersey 的服务器.当我从 Eclipse 执行时，一切都很好.但是，如果我使用 Maven 的 assembly:single 目标将我的服务器和所有依赖项组装到一个 jar 中，我会得到一个异常:
Sep 26, 2012 5:35:59 PM com.sun.jersey.spi.container.ContainerResponse 写严重:Java 类 com.acme.server.webservice 的消息正文编写器.exception.WebServiceFailure 和 Java 类型类 com.acme.server.webservice.exception.WebServiceFailure 和 MIME 媒体类型 application/json 不是 fo和2012 年 9 月 26 日下午 5:35:59 com.sun.jersey.spi.container.ContainerResponse 写SEVERE:注册的消息正文编写器与 MIME 媒体类型兼容是:*/* ->com.sun.jersey.server.impl.template.ViewableMessageBodyWriter17:35:59.372 [qtp184245201-22 -/] 错误 o.a.h.ReflectorServletProcessor - onRequest()javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: 一团糟Java 类 com.acme.server.webservice.exception.WebS 的年龄正文编写器erviceFailure 和 Java 类型类 com.acme.server.webservice.exception.WebServiceFailure，并且未找到 MIME 媒体类型 application/json在 com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285) ~[vma-server-0.0.1-SNAPSHOT-jar-with-dependencies.jar:na]在 com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1457) ~[server-0.0.1-SNAPSHOT-jar-with-dependencies.jar:na]...
完整的跟踪在这里，如果它有用的话:https://gist.github.com/3790817
Maven 在创建 jar-with-dependencies 时不会抛出任何错误.
我是 Maven 和 Java 部署的新手，我真的不知道如何进行调试.
此外，虽然我需要解决这个问题，但我也很感激任何建议的变通办法，因为我需要尽快生成我的服务器的可执行演示，一个尖头老板 (tm) 可以在没有 Eclipse 的情况下执行该演示.
解决方案:
根据 Pavel 的回答，我放弃了 maven-assemly-plugin 以支持 maven-shade-plugin.这是对我有用的阴影配置:
<插件><groupId>org.apache.maven.plugins</groupId><artifactId>maven-shade-plugin</artifactId><version>2.0</version><执行><执行><phase>包</phase><目标><目标>阴影</目标></目标><配置><变形金刚><!-- 使用转换器来处理 META-INF/services 的合并 - 参见 http://java.net/jira/browse/JERSEY-440?focusedCommentId=14822&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_14822 --><变压器implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/></变形金刚><过滤器><!-- 过滤以解决无效签名文件"问题-请参阅 http://stackoverflow.com/a/6743609/589215--><过滤器><神器>*:*</神器><排除><exclude>META-INF/*.SF</exclude><exclude>META-INF/*.DSA</exclude><exclude>META-INF/*.RSA</exclude></排除></过滤器></过滤器></配置></执行></执行></插件>您没有正确合并 Jersey jar.
Jersey 1.x 使用 META-INF/services 机制来发现它的组件和程序集:single 可能只是将所有内容复制到单个 jar 中，覆盖已经存在的文件但 META-INF/services 文件需要连接.
尝试使用 jersey-bundle (com.sun.jersey:jersey-bundle:1.14) 或修复您的程序集设置(或找到另一个插件来做得更好).
I'm writing a server that embeds Jetty w/ Jersey. When I execute from Eclipse, everything is great. However, if I assemble my server and all dependencies into a single jar using Maven's assembly:single goal, I get an exception:
Sep 26, 2012 5:35:59 PM com.sun.jersey.spi.container.ContainerResponse write
SEVERE: A message body writer for Java class com.acme.server.webservice.
exception.WebServiceFailure, and Java type class com.acme.server.webserv
ice.exception.WebServiceFailure, and MIME media type application/json was not fo
und
Sep 26, 2012 5:35:59 PM com.sun.jersey.spi.container.ContainerResponse write
SEVERE: The registered message body writers compatible with the MIME media type
are:
*/* ->
com.sun.jersey.server.impl.template.ViewableMessageBodyWriter
17:35:59.372 [qtp184245201-22 - /] ERROR o.a.h.ReflectorServletProcessor - onReq
uest()
javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A mess
age body writer for Java class com.acme.server.webservice.exception.WebS
erviceFailure, and Java type class com.acme.server.webservice.exception.
WebServiceFailure, and MIME media type application/json was not found
at com.sun.jersey.spi.container.ContainerResponse.write(ContainerRespons
e.java:285) ~[vma-server-0.0.1-SNAPSHOT-jar-with-dependencies.jar:na]
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequ
est(WebApplicationImpl.java:1457) ~[server-0.0.1-SNAPSHOT-jar-with-dependenc
ies.jar:na]
...
The full trace is here, if it's useful: https://gist.github.com/3790817
Maven throws no errors while creating the jar-with-dependencies.
I'm a novice with Maven and deployment of Java, and I'm really not sure how to proceed with debugging.
Also, while I need to solve this issue I'd also appreciate any suggested work-arounds as I need to produce an executable demo of my server ASAP that a Pointy-Haired Boss (tm) can execute without Eclipse.
Solution:
Based on Pavel's answer, I dropped the maven-assemly-plugin in favor of maven-shade-plugin. Here's the shade configuration that worked for me:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<!-- use transformer to handle merge of META-INF/services - see http://java.net/jira/browse/JERSEY-440?focusedCommentId=14822&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_14822 -->
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
</transformers>
<filters>
<!-- filter to address "Invalid signature file" issue - see http://stackoverflow.com/a/6743609/589215-->
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
You are not merging Jersey jars correctly.
Jersey 1.x uses META-INF/services mechanism to discover its components and assembly:single probably just copies everything into single jar, overriding already present files BUT META-INF/services file(s) needs to be CONCATENATED.
Try using jersey-bundle (com.sun.jersey:jersey-bundle:1.14) or fix your assembly settings (or find another plugin to do it better).
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