testBasic -n MassiveRollback

Make sure to not receive more that buffer can fit currently

ndb/src/common/transporter/TCP_Transporter.cpp

@@ -362,9 +362,12 @@ TCP_Transporter::doReceive() {
   // Select-function must return the socket for read
   // before this method is called
   // It reads the external TCP/IP interface once
-  
+  int size = receiveBuffer.sizeOfBuffer - receiveBuffer.sizeOfData;
+  if(size > 0){
     const int nBytesRead = recv(theSocket, 
-                              receiveBuffer.insertPtr, maxReceiveSize, 0);
+				receiveBuffer.insertPtr, 
+				size < maxReceiveSize ? size : maxReceiveSize, 
+				0);
     
     if (nBytesRead > 0) {
       receiveBuffer.sizeOfData += nBytesRead;
@@ -406,6 +409,9 @@ TCP_Transporter::doReceive() {
       } 
     }
     return nBytesRead;
+  } else {
+    return 0;
+  }
 }
 
 void