我使用了 Netty 3.8.5 库，它运行良好。但是当我在 4.0.0 版本中更改库时，小程序已经停止工作。错误日志：
network: Cache entry not found [url: file:/D:/java/Сlient/dist/lib/netty-common-4.0.0.Alpha5.jar, version: null]
network: Cache entry not found [url: file:/D:/java/Сlient/dist/lib/netty-common-4.0.0.Alpha5.jar, version: null]
security: Validate the certificate chain using CertPath API
security: The certificate hasnt been expired, no need to check timestamping info
security: Found jurisdiction list file
security: No need to checking trusted extension for this certificate
security: The CRL support is disabled
security: The OCSP support is disabled
security: This OCSP End Entity validation is disabled
security: Checking if certificate is in Deployment denied certificate store
security: Checking if certificate is in Deployment permanent certificate store
network: Cache entry not found [url: file:/D:/java/Сlient/dist/lib/netty-common-4.0.0.Alpha5.jar, version: null]
basic: Plugin2ClassLoader.getPermissions CeilingPolicy allPerms
network: Cache entry not found [url: file:/D:/java/Сlient/dist/lib/netty-buffer-4.0.0.Alpha5.jar, version: null]
security: Validate the certificate chain using CertPath API
security: The certificate hasnt been expired, no need to check timestamping info
security: Found jurisdiction list file
security: No need to checking trusted extension for this certificate
security: The CRL support is disabled
security: The OCSP support is disabled
security: This OCSP End Entity validation is disabled
security: Checking if certificate is in Deployment denied certificate store
security: Checking if certificate is in Deployment permanent certificate store
network: Cache entry not found [url: file:/D:/java/Сlient/dist/lib/netty-buffer-4.0.0.Alpha5.jar, version: null]
basic: Plugin2ClassLoader.getPermissions CeilingPolicy allPerms
java.lang.ExceptionInInitializerError
at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:457)
at io.netty.channel.DefaultChannelPipeline$HeadHandler.bind(DefaultChannelPipeline.java:1538)
at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:1126)
at io.netty.channel.DefaultChannelPipeline$10.run(DefaultChannelPipeline.java:1134)
at io.netty.channel.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:186)
at io.netty.channel.socket.nio.NioEventLoop.run(NioEventLoop.java:210)
at io.netty.channel.SingleThreadEventExecutor$1.run(SingleThreadEventExecutor.java:80)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at io.netty.util.internal.DetectionUtil.<clinit>(DetectionUtil.java:43)
... 8 more
Ignored exception: java.lang.ExceptionInInitializerError
окт 21, 2012 8:09:56 PM io.netty.channel.DefaultChannelPipeline
WARNING: An exceptionCaught() event was fired, and it reached at the end of the pipeline. It usually means the last inbound handler in the pipeline did not handle the exception.
java.lang.ExceptionInInitializerError
at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:457)
at io.netty.channel.DefaultChannelPipeline$HeadHandler.bind(DefaultChannelPipeline.java:1538)
at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:1126)
at io.netty.channel.DefaultChannelPipeline$10.run(DefaultChannelPipeline.java:1134)
at io.netty.channel.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:186)
at io.netty.channel.socket.nio.NioEventLoop.run(NioEventLoop.java:210)
at io.netty.channel.SingleThreadEventExecutor$1.run(SingleThreadEventExecutor.java:80)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at io.netty.util.internal.DetectionUtil.<clinit>(DetectionUtil.java:43)
... 8 more
basic: Removed progress listener: sun.plugin.util.ProgressMonitorAdapter@147c327
security: Reset deny session certificate store
我使用 DiscardServer https://github.com/netty/netty/tree/master/example/src/main/java/io/netty/example/discard的示例， 没有任何更改。
此行导致错误：
ChannelFuture f = b.bind().sync();
所有文件均已签名。当我单独运行 DiscardServer（不在小程序中）时，一切正常
我的代码：
public class Applet extends JApplet
{
@Override
public void init()
{
try {
new DiscardServer(1020).run();
} catch (Exception ex) {
Logger.getLogger(Applet.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
DiscardServer：https ://github.com/netty/netty/tree/master/example/src/main/java/io/netty/example/discard