Question

在GWT中使用GeoTools，在开发模式下运行我的应用程序时，我得到以下堆栈跟踪：

WARNING: Can't load a service for category "CRSAuthorityFactory". Cause is "ServiceConfigurationError: org.opengis.referencing.crs.CRSAuthorityFactory: Provider org (...) lang.ClassCastException: class org.geotools.referencing.operation.DefaultMathTransformFactory".
sun.misc.ServiceConfigurationError: org.opengis.referencing.crs.CRSAuthorityFactory: Provider org.geotools.referencing.factory.epsg.DefaultFactory could not be instantiated: java.lang.ClassCastException: class org.geotools.referencing.operation.DefaultMathTransformFactory
    at sun.misc.Service.fail(Unknown Source)
    at sun.misc.Service.access$200(Unknown Source)
    at sun.misc.Service$LazyIterator.next(Unknown Source)
    at org.geotools.factory.FactoryRegistry.register(FactoryRegistry.java:829)
    at org.geotools.factory.FactoryRegistry.scanForPlugins(FactoryRegistry.java:773)
    at org.geotools.factory.FactoryRegistry.scanForPluginsIfNeeded(FactoryRegistry.java:808)
    at org.geotools.factory.FactoryRegistry.getUnfilteredProviders(FactoryRegistry.java:229)
    at org.geotools.factory.FactoryRegistry.getServiceImplementation(FactoryRegistry.java:429)
    at org.geotools.factory.FactoryRegistry.getServiceProvider(FactoryRegistry.java:364)
    at org.geotools.factory.FactoryCreator.getServiceProvider(FactoryCreator.java:143)
    at org.geotools.referencing.ReferencingFactoryFinder.getAuthorityFactory(ReferencingFactoryFinder.java:216)
    at org.geotools.referencing.ReferencingFactoryFinder.getCRSAuthorityFactory(ReferencingFactoryFinder.java:436)

这个seems to be a Jetty thing，因为当我部署到另一个容器时它工作正常。关于如何解决这个问题的任何想法？

Answer 1

看起来这是Jetty中的类加载问题。找到this GeoTools issue和this GWT patch，这两个似乎都解决了这个问题，但目前似乎都没有引起人们的注意。 GeoMajas解决了a ServletFilter to hijack Jetty's classloader的问题：我最终采取了相同的方法，这种方法很有效。

带GWT的GeoTools（开发模式Jetty）

1 个答案: