gwt + mongo (吗啡) = 不兼容的类更改错误
Gwt-> RPC-> MongoDB (Morphia)
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at
com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at
com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
at com.mongodb.MongoOptions.reset(MongoOptions.java:47)
at com.mongodb.MongoOptions.<init>(MongoOptions.java:29)
at com.mongodb.Mongo.<init>(Mongo.java:148)
at com.mongodb.Mongo.<init>(Mongo.java:113)
at
myapp.database.MyCodeImpl.getDataSource(MyCodeImpl.java:42)
at
MyCodeImpl.getDataSource():
public Datastore getDataSource() {
try {
Morphia morphia = new Morphia();
Mongo db = new Mongo("localhost");
return morphia.createDatastore(db, getDatabaseName());
} catch (UnknownHostException e) {
e.printStackTrace();
throw new DatabaseException();
}
}
第 42 行: Mongo db = new Mongo("localhost");
没有 GWT 也可以正常工作。为什么不能与 GWT 一起使用? 看起来 com.mongodb.DbDecoder 有问题...有什么建议吗?
Gwt -> RPC -> MongoDB (Morphia)
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at
com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at
com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
at com.mongodb.MongoOptions.reset(MongoOptions.java:47)
at com.mongodb.MongoOptions.<init>(MongoOptions.java:29)
at com.mongodb.Mongo.<init>(Mongo.java:148)
at com.mongodb.Mongo.<init>(Mongo.java:113)
at
myapp.database.MyCodeImpl.getDataSource(MyCodeImpl.java:42)
at
MyCodeImpl.getDataSource():
public Datastore getDataSource() {
try {
Morphia morphia = new Morphia();
Mongo db = new Mongo("localhost");
return morphia.createDatastore(db, getDatabaseName());
} catch (UnknownHostException e) {
e.printStackTrace();
throw new DatabaseException();
}
}
line 42: Mongo db = new Mongo("localhost");
Without GWT works fine. Why doesn't work with GWT?
Looks like problem with com.mongodb.DbDecoder... Any suggestions?
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从堆栈跟踪来看,这似乎是一个 GWT 问题。确保您没有将 gwt-user.jar 或 gwt-dev.jar 部署到 Jetty。还要确保您的类路径中只有一个版本的 GWT。
From the stacktrace, it looks like it's a GWT problem. Make sure you don't deploy gwt-user.jar or gwt-dev.jar to your Jetty. Also make sure that you have only one version of GWT in your class path.