db_stress prints key in Hex (#7533)

Summary:
db_stress prints key in both id and hex. https://github.com/facebook/rocksdb/issues/7531

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7533

Test Plan: local test

Reviewed By: akankshamahajan15

Differential Revision: D24252725

Pulled By: jay-zhuang

fbshipit-source-id: f0c1409a0568874df36949d5da139316d978fa98

db_stress_tool/db_stress_common.cc

@@ -160,8 +160,10 @@ void PrintKeyValue(int cf, uint64_t key, const char* value, size_t sz) {
     snprintf(buf, 4, "%X", value[i]);
     tmp.append(buf);
   }
-  fprintf(stdout, "[CF %d] %" PRIi64 " == > (%" ROCKSDB_PRIszt ") %s\n", cf,
-          key, sz, tmp.c_str());
+  auto key_str = Key(key);
+  Slice key_slice = key_str;
+  fprintf(stdout, "[CF %d] %s (%" PRIi64 ") == > (%" ROCKSDB_PRIszt ") %s\n",
+          cf, key_slice.ToString(true).c_str(), key, sz, tmp.c_str());
 }
 
 // Note that if hot_key_alpha != 0, it generates the key based on Zipfian

db_stress_tool/db_stress_test_base.cc

@@ -329,9 +329,11 @@ void StressTest::VerificationAbort(SharedState* shared, std::string msg,
 
 void StressTest::VerificationAbort(SharedState* shared, std::string msg, int cf,
                                    int64_t key) const {
+  auto key_str = Key(key);
+  Slice key_slice = key_str;
   fprintf(stderr,
-          "Verification failed for column family %d key %" PRIi64 ": %s\n", cf,
-          key, msg.c_str());
+          "Verification failed for column family %d key %s (%" PRIi64 "): %s\n",
+          cf, key_slice.ToString(true).c_str(), key, msg.c_str());
   shared->SetVerificationFailure();
 }