diff --git a/source/common/src/tdatablock.c b/source/common/src/tdatablock.c
index 7a67522231..98e58c8bd7 100644
--- a/source/common/src/tdatablock.c
+++ b/source/common/src/tdatablock.c
@@ -2610,7 +2610,10 @@ int32_t dumpBlockData(SSDataBlock* pDataBlock, const char* flag, char** pDataBuf
           if (code < 0) {
             uError("func %s failed to convert to ucs charset since %s", __func__, tstrerror(code));
             goto _exit;
+          } else { // reset the length value
+            code = TSDB_CODE_SUCCESS;
           }
+
           len += snprintf(dumpBuf + len, size - len, " %15s |", pBuf);
           if (len >= size - 1) goto _exit;
         } break;