Program: 53928
Project: 53928
Buggy source:
@Override protected Trace createTrace(Object target,Object[] args){
  org.jboss.netty.channel.MessageEvent messageEvent=getMessageEvent.invoke(target);
  org.jboss.netty.handler.codec.http.HttpRequest request=(org.jboss.netty.handler.codec.http.HttpRequest)messageEvent.getMessage();
  Channel channel=messageEvent.getChannel();
  if (channel == null) {
    logger.debug("String_Node_Str");
    return null;
  }
  final boolean sampling=isSamplingEnabled(request);
  if (!sampling) {
    final Trace trace=getTraceContext().disableSampling();
    if (isDebug) {
      String requestURL=request.getUri();
      String remoteAddr=getRemoteAddress(channel);
      logger.debug("String_Node_Str",requestURL,remoteAddr);
    }
    return trace;
  }
  final TraceId traceId=populateTraceIdFromRequest(request);
  if (traceId != null) {
    final Trace trace=getTraceContext().continueTraceObject(traceId);
    if (trace.canSampled()) {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{traceId,requestURL,remoteAddr});
      }
      return trace;
    }
 else {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{traceId,requestURL,remoteAddr});
      }
      return trace;
    }
  }
 else {
    final Trace trace=getTraceContext().newTraceObject();
    if (trace.canSampled()) {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{requestURL,remoteAddr});
      }
      return trace;
    }
 else {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{requestURL,remoteAddr});
      }
      return trace;
    }
  }
}

Fixed version (ground truth):
@Override protected Trace createTrace(Object target,Object[] args){
  org.jboss.netty.channel.MessageEvent messageEvent=getMessageEvent.invoke(target);
  org.jboss.netty.handler.codec.http.HttpRequest request=(org.jboss.netty.handler.codec.http.HttpRequest)messageEvent.getMessage();
  Channel channel=messageEvent.getChannel();
  if (channel == null) {
    logger.debug("String_Node_Str");
    return null;
  }
  final boolean sampling=isSamplingEnabled(request);
  if (!sampling) {
    final TraceContext traceContext=getTraceContext();
    final Trace trace=traceContext.disableSampling();
    if (isDebug) {
      String requestURL=request.getUri();
      String remoteAddr=getRemoteAddress(channel);
      logger.debug("String_Node_Str",requestURL,remoteAddr);
    }
    return trace;
  }
  final TraceId traceId=populateTraceIdFromRequest(request);
  if (traceId != null) {
    final TraceContext traceContext=getTraceContext();
    final Trace trace=traceContext.continueTraceObject(traceId);
    if (trace.canSampled()) {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{traceId,requestURL,remoteAddr});
      }
      return trace;
    }
 else {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{traceId,requestURL,remoteAddr});
      }
      return trace;
    }
  }
 else {
    TraceContext traceContext=getTraceContext();
    final Trace trace=traceContext.newTraceObject();
    if (trace.canSampled()) {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{requestURL,remoteAddr});
      }
      return trace;
    }
 else {
      if (isDebug) {
        String requestURL=request.getUri();
        String remoteAddr=getRemoteAddress(channel);
        logger.debug("String_Node_Str",new Object[]{requestURL,remoteAddr});
      }
      return trace;
    }
  }
}