diff --git a/services/blob/src/Reactors/server/PutReactor.h b/services/blob/src/Reactors/server/PutReactor.h
index fe0f40d46..fa749e70c 100644
--- a/services/blob/src/Reactors/server/PutReactor.h
+++ b/services/blob/src/Reactors/server/PutReactor.h
@@ -1,103 +1,109 @@
 #pragma once
 
 #include "ServerBidiReactorBase.h"
 
 #include <blob.grpc.pb.h>
 #include <blob.pb.h>
 
 #include <memory>
 #include <string>
 
 namespace comm {
 namespace network {
 namespace reactor {
 
 class PutReactor
     : public ServerBidiReactorBase<blob::PutRequest, blob::PutResponse> {
   std::string holder;
   std::string blobHash;
   std::string currentChunk;
   std::unique_ptr<database::S3Path> s3Path;
   std::shared_ptr<database::BlobItem> blobItem;
   std::unique_ptr<MultiPartUploader> uploader;
   bool dataExists = false;
 
 public:
   std::unique_ptr<ServerBidiReactorStatus> handleRequest(
       blob::PutRequest request,
       blob::PutResponse *response) override {
     if (this->holder.empty()) {
       if (request.holder().empty()) {
         throw std::runtime_error("holder has not been provided");
       }
       this->holder = request.holder();
       return nullptr;
     }
     if (this->blobHash.empty()) {
       if (request.blobhash().empty()) {
         throw std::runtime_error("blob hash has not been provided");
       }
       this->blobHash = request.blobhash();
       this->blobItem =
           database::DatabaseManager::getInstance().findBlobItem(this->blobHash);
       if (this->blobItem != nullptr) {
         this->s3Path =
             std::make_unique<database::S3Path>(this->blobItem->getS3Path());
         response->set_dataexists(true);
         this->dataExists = true;
         return std::make_unique<ServerBidiReactorStatus>(
             grpc::Status::OK, true);
       }
       this->s3Path = std::make_unique<database::S3Path>(
           tools::generateS3Path(BLOB_BUCKET_NAME, this->blobHash));
       this->blobItem =
           std::make_shared<database::BlobItem>(this->blobHash, *s3Path);
       response->set_dataexists(false);
       return nullptr;
     }
     if (request.datachunk().empty()) {
       return std::make_unique<ServerBidiReactorStatus>(grpc::Status(
           grpc::StatusCode::INVALID_ARGUMENT, "data chunk expected"));
     }
     if (this->uploader == nullptr) {
       this->uploader = std::make_unique<MultiPartUploader>(
           getS3Client(), BLOB_BUCKET_NAME, s3Path->getObjectName());
     }
     this->currentChunk += request.datachunk();
     if (this->currentChunk.size() > AWS_MULTIPART_UPLOAD_MINIMUM_CHUNK_SIZE) {
       this->uploader->addPart(this->currentChunk);
       this->currentChunk.clear();
     }
     return nullptr;
   }
 
   void terminateCallback() override {
+    if (this->holder.empty()) {
+      throw std::runtime_error("holder has not been provided");
+    }
+    if (this->blobHash.empty()) {
+      throw std::runtime_error("blob hash has not been provided");
+    }
     if (!this->status.status.ok()) {
       return;
     }
     const database::ReverseIndexItem reverseIndexItem(
         this->holder, this->blobHash);
     if (this->uploader == nullptr) {
       if (!this->dataExists) {
         throw std::runtime_error("uploader not initialized as expected");
       }
       database::DatabaseManager::getInstance().putReverseIndexItem(
           reverseIndexItem);
       return;
     }
     if (!this->readingAborted) {
       return;
     }
     if (!currentChunk.empty()) {
       this->uploader->addPart(this->currentChunk);
     }
     this->uploader->finishUpload();
     database::DatabaseManager::getInstance().putBlobItem(*this->blobItem);
     database::DatabaseManager::getInstance().putReverseIndexItem(
         reverseIndexItem);
   }
 };
 
 } // namespace reactor
 } // namespace network
 } // namespace comm