Java NoSuchMethodError异常

对我的环境说几句话： Geoserver部署在容器（env Tomcat 7，dev Jetty）上，模块使用postgresql 9.xx。 问题是，geoserver使用postgresql 8.4，我们正在用web inf/lib上的9.3替换它（不要问为什么等） 在我需要介绍Postgres的大对象处理之前，一切都很顺利。 在dev env（jetty+netbeans）上，一切都很好，但一旦WAR部署到tomcat Im geting上：

java.lang.NoSuchMethodError： org.postgresql.PGConnection.getLargeObjectAPI（）Lorg/postgresql/largeobject/LargeObjectManager

以下是导致上述问题的代码片段：

PGConnection pgDbconn = (PGConnection) dbConn;
LargeObjectManager largeObjectAPI = pgDbconn.getLargeObjectAPI(); // first method
LargeObjectManager lobj = new LargeObjectManager((BaseConnection) pgDbconn); // second - directly

从我看到的和 方法在两个jar上都存在。 你知道我为什么不会犯这样的错误吗？解决办法是什么

编辑：仅web inf/lib上的postgresql9.xxx。 全堆栈跟踪

org.jboss.resteasy.spi.UnhandledException: java.lang.NoSuchMethodError: org.postgresql.PGConnection.getLargeObjectAPI()Lorg/postgresql/largeobject/LargeObjectManager;
    org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:365)
    org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:233)
    org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:209)
    org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:557)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126)
    org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.geoserver.filters.ThreadLocalsCleanupFilter.doFilter(ThreadLocalsCleanupFilter.java:27)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:74)
    org.geoserver.wms.animate.AnimatorFilter.doFilter(AnimatorFilter.java:70)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:70)
    org.geoserver.monitor.MonitorFilter.doFilter(MonitorFilter.java:137)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:70)
    org.geoserver.flow.controller.IpBlacklistFilter.doFilter(IpBlacklistFilter.java:92)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:70)
    org.geoserver.filters.SpringDelegatingFilter.doFilter(SpringDelegatingFilter.java:45)
    org.geoserver.platform.AdvancedDispatchFilter.doFilter(AdvancedDispatchFilter.java:49)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:311)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
    org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerAnonymousAuthenticationFilter.doFilter(GeoServerAnonymousAuthenticationFilter.java:53)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.geoserver.security.filter.GeoServerBasicAuthenticationFilter.doFilter(GeoServerBasicAuthenticationFilter.java:82)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    org.geoserver.security.filter.GeoServerSecurityContextPersistenceFilter$1.doFilter(GeoServerSecurityContextPersistenceFilter.java:52)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)
    org.geoserver.security.GeoServerSecurityFilterChainProxy.doFilter(GeoServerSecurityFilterChainProxy.java:134)
    org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
    org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
    org.geoserver.filters.LoggingFilter.doFilter(LoggingFilter.java:75)
    org.geoserver.filters.GZIPFilter.doFilter(GZIPFilter.java:42)
    org.geoserver.filters.SessionDebugFilter.doFilter(SessionDebugFilter.java:47)
    org.geoserver.filters.FlushSafeFilter.doFilter(FlushSafeFilter.java:43)
    org.vfny.geoserver.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:109)

root cause

java.lang.NoSuchMethodError: org.postgresql.PGConnection.getLargeObjectAPI()Lorg/postgresql/largeobject/LargeObjectManager;
    org.geoserver.attachmentRS.AttachmentRS.getFile(AttachmentRS.java:310)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:483)
    org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:167)
    org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:269)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:227)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:216)
    org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:542)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126)
    org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.geoserver.filters.ThreadLocalsCleanupFilter.doFilter(ThreadLocalsCleanupFilter.java:27)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:74)
    org.geoserver.wms.animate.AnimatorFilter.doFilter(AnimatorFilter.java:70)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:70)
    org.geoserver.monitor.MonitorFilter.doFilter(MonitorFilter.java:137)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:70)
    org.geoserver.flow.controller.IpBlacklistFilter.doFilter(IpBlacklistFilter.java:92)
    org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:70)
    org.geoserver.filters.SpringDelegatingFilter.doFilter(SpringDelegatingFilter.java:45)
    org.geoserver.platform.AdvancedDispatchFilter.doFilter(AdvancedDispatchFilter.java:49)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:311)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
    org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerAnonymousAuthenticationFilter.doFilter(GeoServerAnonymousAuthenticationFilter.java:53)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.geoserver.security.filter.GeoServerBasicAuthenticationFilter.doFilter(GeoServerBasicAuthenticationFilter.java:82)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:68)
    org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    org.geoserver.security.filter.GeoServerSecurityContextPersistenceFilter$1.doFilter(GeoServerSecurityContextPersistenceFilter.java:52)
    org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:72)
    org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
    org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)
    org.geoserver.security.GeoServerSecurityFilterChainProxy.doFilter(GeoServerSecurityFilterChainProxy.java:134)
    org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
    org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
    org.geoserver.filters.LoggingFilter.doFilter(LoggingFilter.java:75)
    org.geoserver.filters.GZIPFilter.doFilter(GZIPFilter.java:42)
    org.geoserver.filters.SessionDebugFilter.doFilter(SessionDebugFilter.java:47)
    org.geoserver.filters.FlushSafeFilter.doFilter(FlushSafeFilter.java:43)
    org.vfny.geoserver.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:109)

---

那好吧。按如下方式检查您的神秘连接类：

PGConnection pgDbconn = (PGConnection) dbConn;
Class<PGConnection> clazz = pgDbconn.getClass();
for(Method m : clazz.getDeclaredMethods()) {
   log.info(m.getReturnType() + " " + m.getName());
}

PGConnection pgDbconn=（PGConnection）dbConn；
类clazz=pgDbconn.getClass（）；
对于（方法m:clazz.getDeclaredMethods（））{
log.info（m.getReturnType（）+“”+m.getName（））；
}

---

也许这会对你的问题有更多的了解。

我解决了它。有问题的类是我的WEB-INF/LIB中名为

postgis stubs

的7KB JAR。可能是它被加载而不是

postgresql

，导致

NSME

。

---

感谢@kayaman，感谢第二个用户，他提到加载了错误的驱动程序。

完整的堆栈跟踪是什么，运行时类路径上还有其他postgres JAR吗？@kayaman还请注意，postgresql工件将groupid从8.xx中的postgresql更改为9.xx中的org.postgresql，这可能是问题所在吗？但是，来自两个JAR的所有其他方法都可以正常工作。工件更改不会导致

NoSuchMethodError

。Geoserver的源代码可用吗？我会四处窥探

org.geoserver.attachmentRS.attachmentRS.getFile（attachmentRS.java:310）

，但它仍然没有改变一个事实，即

NSME

源于编译API与运行时API不同的简单原因。但是，如果该方法从7.3开始就存在，那么您似乎不太可能有一个7.3之前的JAR文件隐藏在某处。您所指的类是我们的模块（310是第一篇文章中的代码片段），使用的是feral GetLargeObjectAPI。我100%确定没有7.3版本之前的JAR。连接是

org.postgresql.jdbc4.Jdbc4Connection

，声明的方法只返回这个特定的类属性，但是它继承了jdbc2connection，它确实有getLargeObjectApi和getFastpathAPI。当使用postgresql 8.4或9.3时，从控制台应用程序存根运行的相同代码也可以正常工作。那么，使用

getMethods（）

怎么样。如果该方法存在（具有匹配的签名），请尝试使用反射调用它。有一些黑魔法正在发生。我同意黑魔法部分：反射调用方法give

java.lang.reflect.InvocationTargetException

：

引起的原因：java.lang.NoSuchMethodError:org.postgresql.core.BaseConnection.getFastpathAPI（）Lorg/postgresql/fastpath/fastpath；在org.postgresql.largeobject.LargeObjectManager.（LargeObjectManager.java:105）在org.postgresql.jdbc2.AbstractJdbc2Connection.getLargeObjectAPI（AbstractJdbc2Connection.java:382）

Hah，这很有意义。这也有助于确定：