Program: 14144
Project: 14144
Buggy source:
@Override public void outgoingMessage(ChannelHandlerContext ctx,MessageEvent event) throws Exception {
  if (event.getMessage() instanceof MappingHttpResponse) {
    MappingHttpResponse httpResponse=(MappingHttpResponse)event.getMessage();
    BaseMessage msg=(BaseMessage)httpResponse.getMessage();
    if (msg instanceof PostObjectResponseType) {
      PostObjectResponseType postObjectResponse=(PostObjectResponseType)msg;
      String redirectUrl=postObjectResponse.getRedirectUrl();
      if (redirectUrl != null) {
        httpResponse.addHeader(HttpHeaders.Names.LOCATION,redirectUrl);
        httpResponse.setStatus(HttpResponseStatus.SEE_OTHER);
        httpResponse.setMessage(null);
      }
 else {
        Integer successCode=postObjectResponse.getSuccessCode();
        if (successCode != null) {
          if (successCode != 201) {
            httpResponse.setMessage(null);
            httpResponse.setStatus(new HttpResponseStatus(successCode,"String_Node_Str"));
          }
 else {
            httpResponse.setStatus(new HttpResponseStatus(successCode,"String_Node_Str"));
          }
        }
      }
      event.getFuture().addListener(ChannelFutureListener.CLOSE);
    }
 else     if (msg instanceof CopyObjectResponseType) {
      CopyObjectResponseType copyResponse=(CopyObjectResponseType)msg;
      if (copyResponse.getVersionId() != null)       httpResponse.addHeader("String_Node_Str",copyResponse.getVersionId());
      if (copyResponse.getCopySourceVersionId() != null)       httpResponse.addHeader("String_Node_Str",copyResponse.getCopySourceVersionId());
    }
 else     if (msg instanceof CreateBucketResponseType) {
      httpResponse.setStatus(HttpResponseStatus.OK);
      removeResponseBody(msg,httpResponse);
      event.getFuture().addListener(ChannelFutureListener.CLOSE);
    }
 else     if (msg instanceof ObjectStorageDataResponseType) {
      ObjectStorageDataResponseType response=(ObjectStorageDataResponseType)msg;
      if (response.getEtag() != null) {
        httpResponse.setHeader(HttpHeaders.Names.ETAG,'\"' + response.getEtag() + '\"');
      }
      if (response.getVersionId() != null) {
        httpResponse.setHeader(ObjectStorageProperties.X_AMZ_VERSION_ID,response.getVersionId());
      }
      if (msg instanceof ObjectStorageDataGetResponseType && response.getLastModified() != null) {
        httpResponse.setHeader(HttpHeaders.Names.LAST_MODIFIED,DateFormatter.dateToHeaderFormattedString(response.getLastModified()));
      }
      if (msg instanceof PutObjectResponseType || msg instanceof UploadPartResponseType) {
        removeResponseBody(msg,httpResponse);
      }
    }
 else     if (msg instanceof ObjectStorageResponseType) {
      if (msg instanceof SetBucketAccessControlPolicyResponseType || msg instanceof SetBucketLifecycleResponseType || msg instanceof SetBucketLoggingStatusResponseType|| msg instanceof SetBucketVersioningStatusResponseType|| msg instanceof SetObjectAccessControlPolicyResponseType) {
        if (msg instanceof SetObjectAccessControlPolicyResponseType && ((SetObjectAccessControlPolicyResponseType)msg).getVersionId() != null) {
          httpResponse.setHeader(ObjectStorageProperties.X_AMZ_VERSION_ID,((SetObjectAccessControlPolicyResponseType)msg).getVersionId());
        }
        if (msg instanceof SetBucketTaggingResponseType) {
          httpResponse.setStatus(HttpResponseStatus.NO_CONTENT);
        }
        removeResponseBody(msg,httpResponse);
      }
    }
  }
}

Fixed version (ground truth):
@Override public void outgoingMessage(ChannelHandlerContext ctx,MessageEvent event) throws Exception {
  if (event.getMessage() instanceof MappingHttpResponse) {
    MappingHttpResponse httpResponse=(MappingHttpResponse)event.getMessage();
    BaseMessage msg=(BaseMessage)httpResponse.getMessage();
    if (msg instanceof PostObjectResponseType) {
      PostObjectResponseType postObjectResponse=(PostObjectResponseType)msg;
      String redirectUrl=postObjectResponse.getRedirectUrl();
      if (redirectUrl != null) {
        httpResponse.addHeader(HttpHeaders.Names.LOCATION,redirectUrl);
        httpResponse.setStatus(HttpResponseStatus.SEE_OTHER);
        httpResponse.setMessage(null);
      }
 else {
        Integer successCode=postObjectResponse.getSuccessCode();
        if (successCode != null) {
          if (successCode != 201) {
            httpResponse.setMessage(null);
            httpResponse.setStatus(new HttpResponseStatus(successCode,"String_Node_Str"));
          }
 else {
            httpResponse.setStatus(new HttpResponseStatus(successCode,"String_Node_Str"));
          }
        }
      }
      event.getFuture().addListener(ChannelFutureListener.CLOSE);
    }
 else     if (msg instanceof CopyObjectResponseType) {
      CopyObjectResponseType copyResponse=(CopyObjectResponseType)msg;
      if (copyResponse.getVersionId() != null)       httpResponse.addHeader("String_Node_Str",copyResponse.getVersionId());
      if (copyResponse.getCopySourceVersionId() != null)       httpResponse.addHeader("String_Node_Str",copyResponse.getCopySourceVersionId());
    }
 else     if (msg instanceof CreateBucketResponseType) {
      httpResponse.setStatus(HttpResponseStatus.OK);
      removeResponseBody(msg,httpResponse);
      event.getFuture().addListener(ChannelFutureListener.CLOSE);
    }
 else     if (msg instanceof ObjectStorageDataResponseType) {
      ObjectStorageDataResponseType response=(ObjectStorageDataResponseType)msg;
      if (response.getEtag() != null) {
        httpResponse.setHeader(HttpHeaders.Names.ETAG,'\"' + response.getEtag() + '\"');
      }
      if (response.getVersionId() != null) {
        httpResponse.setHeader(ObjectStorageProperties.X_AMZ_VERSION_ID,response.getVersionId());
      }
      if (msg instanceof ObjectStorageDataGetResponseType && response.getLastModified() != null) {
        httpResponse.setHeader(HttpHeaders.Names.LAST_MODIFIED,DateFormatter.dateToHeaderFormattedString(response.getLastModified()));
      }
      if (msg instanceof PutObjectResponseType || msg instanceof UploadPartResponseType) {
        removeResponseBody(msg,httpResponse);
      }
    }
 else     if (msg instanceof ObjectStorageResponseType) {
      if (msg instanceof SetBucketAccessControlPolicyResponseType || msg instanceof SetBucketLifecycleResponseType || msg instanceof SetBucketLoggingStatusResponseType|| msg instanceof SetBucketVersioningStatusResponseType|| msg instanceof SetObjectAccessControlPolicyResponseType|| msg instanceof SetBucketTaggingResponseType) {
        if (msg instanceof SetObjectAccessControlPolicyResponseType && ((SetObjectAccessControlPolicyResponseType)msg).getVersionId() != null) {
          httpResponse.setHeader(ObjectStorageProperties.X_AMZ_VERSION_ID,((SetObjectAccessControlPolicyResponseType)msg).getVersionId());
        }
        removeResponseBody(msg,httpResponse);
      }
    }
  }
}