最近在连接cmpp时，总是报一个异常，异常信息如下，请各位大神看看，出点建议
[09:01:17] NioProcessor-2 ERROR [] [] [cmpp2.sms.SmsObject] - Error parsing PDU:
cmpp2.sms.PDUException: cmpp2.sms.NotEnoughDataInByteBufferException: Not enough data in byte buffer. Expected 1, available: 0.
at cmpp2.pdu.ConnectResp.setBody(ConnectResp.java:76)
at cmpp2.pdu.CmppPDUParser.createPDUFromBuffer(CmppPDUParser.java:83)
at cmpp2.client.CmppRequestDecoder.doDecode(CmppRequestDecoder.java:51)
at org.apache.mina.filter.codec.CumulativeProtocolDecoder.decode(CumulativeProtocolDecoder.java:178)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:241)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:693)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:646)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:635)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:67)
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1079)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: cmpp2.sms.NotEnoughDataInByteBufferException: Not enough data in byte buffer. Expected 1, available: 0.
at cmpp2.sms.ByteBuffer.removeStringEx(ByteBuffer.java:296)
at cmpp2.pdu.ConnectResp.setBody(ConnectResp.java:72)
... 19 more
