Program: 34677
Project: 34677
Buggy source:
/** 
 * Complete the connection preface. At this point, we should have received the client connection preface string. Now we need to make sure that the client sent a settings frame along with the preface, update our settings, and send an empty settings frame in response to the client preface.
 */
protected void completeConnectionPreface(){
  if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
    Tr.debug(tc,"String_Node_Str");
  }
  if (Constants.SPEC_INITIAL_WINDOW_SIZE != this.streamReadWindowSize) {
    currentFrame=new FrameSettings(0,-1,-1,-1,(int)this.streamReadWindowSize,-1,-1,false);
  }
 else {
    currentFrame=new FrameSettings();
  }
  this.frameType=FrameTypes.SETTINGS;
  try {
    if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
      Tr.debug(tc,"String_Node_Str" + myID + "String_Node_Str"+ currentFrame.getFrameType().toString()+ "String_Node_Str"+ Direction.WRITING_OUT+ "String_Node_Str"+ muxLink.hashCode());
    }
    this.writeFrameSync();
  }
 catch (  FlowControlException e) {
  }
  if (Constants.SPEC_INITIAL_WINDOW_SIZE != muxLink.maxReadWindowSize) {
    currentFrame=new FrameWindowUpdate(0,(int)muxLink.maxReadWindowSize,false);
    try {
      if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
        Tr.debug(tc,"String_Node_Str" + myID + "String_Node_Str"+ currentFrame.getFrameType().toString()+ "String_Node_Str"+ Direction.WRITING_OUT+ "String_Node_Str"+ muxLink.hashCode());
      }
      this.writeFrameSync();
    }
 catch (    FlowControlException e) {
    }
  }
}

Fixed version (ground truth):
/** 
 * Complete the connection preface. At this point, we should have received the client connection preface string. Now we need to make sure that the client sent a settings frame along with the preface, update our settings, and send an empty settings frame in response to the client preface.
 * @throws StreamClosedException
 * @throws ProtocolException
 */
protected void completeConnectionPreface() throws ProtocolException, StreamClosedException {
  if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
    Tr.debug(tc,"String_Node_Str");
  }
  FrameSettings settings;
  if (Constants.SPEC_INITIAL_WINDOW_SIZE != this.streamReadWindowSize) {
    settings=new FrameSettings(0,-1,-1,-1,(int)this.streamReadWindowSize,-1,-1,false);
  }
 else {
    settings=new FrameSettings();
  }
  this.frameType=FrameTypes.SETTINGS;
  if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
    Tr.debug(tc,"String_Node_Str" + myID + "String_Node_Str"+ currentFrame.getFrameType().toString()+ "String_Node_Str"+ Direction.WRITING_OUT+ "String_Node_Str"+ muxLink.hashCode());
  }
  this.processNextFrame(settings,Direction.WRITING_OUT);
  if (Constants.SPEC_INITIAL_WINDOW_SIZE != muxLink.maxReadWindowSize) {
    FrameWindowUpdate wup=new FrameWindowUpdate(0,(int)muxLink.maxReadWindowSize,false);
    if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
      Tr.debug(tc,"String_Node_Str" + myID + "String_Node_Str"+ currentFrame.getFrameType().toString()+ "String_Node_Str"+ Direction.WRITING_OUT+ "String_Node_Str"+ muxLink.hashCode());
    }
    this.processNextFrame(wup,Direction.WRITING_OUT);
  }
}