Program: 53714
Project: 53714
Buggy source:
@Override public void before(Object target,Object[] args){
  if (isDebug) {
    logger.beforeInterceptor(target,args);
  }
  final Trace trace=traceContext.currentRawTraceObject();
  if (trace == null) {
    return;
  }
  final HttpRequest httpRequest=getHttpRequest(args);
  final boolean sampling=trace.canSampled();
  if (!sampling) {
    if (isDebug) {
      logger.debug("String_Node_Str");
    }
    if (httpRequest != null) {
      httpRequest.setHeader(Header.HTTP_SAMPLED.toString(),SamplingFlagUtils.SAMPLING_RATE_FALSE);
    }
    return;
  }
  final SpanEventRecorder recorder=trace.traceBlockBegin();
  TraceId nextId=trace.getTraceId().getNextTraceId();
  recorder.recordNextSpanId(nextId.getSpanId());
  recorder.recordServiceType(HttpClient4Constants.HTTP_CLIENT_4);
  if (httpRequest != null) {
    httpRequest.setHeader(Header.HTTP_TRACE_ID.toString(),nextId.getTransactionId());
    httpRequest.setHeader(Header.HTTP_SPAN_ID.toString(),String.valueOf(nextId.getSpanId()));
    httpRequest.setHeader(Header.HTTP_PARENT_SPAN_ID.toString(),String.valueOf(nextId.getParentSpanId()));
    httpRequest.setHeader(Header.HTTP_FLAGS.toString(),String.valueOf(nextId.getFlags()));
    httpRequest.setHeader(Header.HTTP_PARENT_APPLICATION_NAME.toString(),traceContext.getApplicationName());
    httpRequest.setHeader(Header.HTTP_PARENT_APPLICATION_TYPE.toString(),Short.toString(traceContext.getServerTypeCode()));
    final NameIntValuePair<String> host=getHost();
    if (host != null) {
      logger.debug("String_Node_Str",host.getName());
      httpRequest.setHeader(Header.HTTP_HOST.toString(),host.getName());
    }
  }
  InterceptorGroupInvocation invocation=interceptorGroup.getCurrentInvocation();
  if (invocation != null) {
    HttpCallContext callContext=(HttpCallContext)invocation.getOrCreateAttachment(new AttachmentFactory(){
      @Override public Object createAttachment(){
        return new HttpCallContext();
      }
    }
);
    invocation.setAttachment(callContext);
  }
}

Fixed version (ground truth):
@Override public void before(Object target,Object[] args){
  if (isDebug) {
    logger.beforeInterceptor(target,args);
  }
  final Trace trace=traceContext.currentRawTraceObject();
  if (trace == null) {
    return;
  }
  final HttpRequest httpRequest=getHttpRequest(args);
  final boolean sampling=trace.canSampled();
  if (!sampling) {
    if (isDebug) {
      logger.debug("String_Node_Str");
    }
    if (httpRequest != null) {
      httpRequest.setHeader(Header.HTTP_SAMPLED.toString(),SamplingFlagUtils.SAMPLING_RATE_FALSE);
    }
    return;
  }
  final SpanEventRecorder recorder=trace.traceBlockBegin();
  TraceId nextId=trace.getTraceId().getNextTraceId();
  recorder.recordNextSpanId(nextId.getSpanId());
  recorder.recordServiceType(HttpClient4Constants.HTTP_CLIENT_4);
  if (httpRequest != null) {
    httpRequest.setHeader(Header.HTTP_TRACE_ID.toString(),nextId.getTransactionId());
    httpRequest.setHeader(Header.HTTP_SPAN_ID.toString(),String.valueOf(nextId.getSpanId()));
    httpRequest.setHeader(Header.HTTP_PARENT_SPAN_ID.toString(),String.valueOf(nextId.getParentSpanId()));
    httpRequest.setHeader(Header.HTTP_FLAGS.toString(),String.valueOf(nextId.getFlags()));
    httpRequest.setHeader(Header.HTTP_PARENT_APPLICATION_NAME.toString(),traceContext.getApplicationName());
    httpRequest.setHeader(Header.HTTP_PARENT_APPLICATION_TYPE.toString(),Short.toString(traceContext.getServerTypeCode()));
    final NameIntValuePair<String> host=getHost();
    if (host != null) {
      final StringBuilder hostStringBuilder=new StringBuilder(host.getName());
      if (host.getValue() > 0) {
        hostStringBuilder.append("String_Node_Str").append(host.getValue());
      }
      final String hostString=hostStringBuilder.toString();
      logger.debug("String_Node_Str",hostString);
      httpRequest.setHeader(Header.HTTP_HOST.toString(),hostString);
    }
  }
  InterceptorGroupInvocation invocation=interceptorGroup.getCurrentInvocation();
  if (invocation != null) {
    HttpCallContext callContext=(HttpCallContext)invocation.getOrCreateAttachment(new AttachmentFactory(){
      @Override public Object createAttachment(){
        return new HttpCallContext();
      }
    }
);
    invocation.setAttachment(callContext);
  }
}