我使用Jersey 2.23.2在AppEngine上创建了一个REST接口
运行本地devserver工作正常,但如果我将其部署到AppEngine, api调用会导致500错误,日志包含此异常:
Uncaught exception from servlet
java.lang.NoSuchMethodError: org.glassfish.jersey.server.ApplicationHandler.<init>
(Ljavax/ws/rs/core/Application;Lorg/glassfish/hk2/utilities/Binder;)V
at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:311)
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:169)
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:359)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
...
(全栈在http://pastebin.com/R1j7CzxK)
我花了相当多的精力来消除这里建议的任何jar冲突,所以最后我的pom看起来像http://pastebin.com/m6UEB3E4.
这是my web.xml的相关部分:
<servlet>
<servlet-name>MyManager</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>javax.ws.rs.Application</param-name>
<param-value>my.package.controller.ApiController</param-value>
</init-param>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>my.package.controller</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>MyManager</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
是什么导致了这个错误,我该如何修复它?有经验吗?
找到解决方案:调用
时mvn appengine:update
没有clean, maven不会从WEB_INF/libs中删除以前版本的jar,这在我的情况下导致AppEngine上的jar冲突。
mvn clean appengine:update
做到了。对于那些遇到类似错误的人,下面是我的最终建议:http://pastebin.com/XeFtw77d