WESB-import-http binding POST method-com.ibm.websphere.sca.ServiceUnavailableException

I have a module(Websphere ESB) which contains an import configured with http binding POST method.I got the below exception when I try to testcom.ibm.websphere.sca.ServiceUnavailableExceptionCould not obtain a connection to the destination or Exception was happened on the connection. Failed to process the request. Async IO operation failed (3), reason: RC: 64 The specified network name is no longer available. Refer to the server logs for more information.Below is the stack trace from ffdc[10/27/14 14:40:35:121 EDT] FFDC Exception:com.ibm.w...Read more