When weblogic 8.1 hangs, all weblogic.socket.Muxer threads are runnable

 Hi,

My application deployed in weblogic 8.1 hangs sometimes. When I took the thread dump, all weblogic.kernel.default threads are waiting for request and none are in runnable state. But all weblogic.socket.Muxer threads are in runnable state. There are no weblogic.socket.Muxer threads in waiting status. Does it show that my application hangs becuase there are no socket muxer threads to handle the client requests? If so why this happens, how all socket muxers are used for a long time. In the thread dump the socket muxers are at the line NTSocketMuxer.getIOCompletionResult.

Any help is appreciated.. Please..