diff --git a/src/sort/sort.cpp b/src/sort/sort.cpp
index e1422aa..6f3ed18 100644
--- a/src/sort/sort.cpp
+++ b/src/sort/sort.cpp
@@ -272,9 +272,9 @@ static size_t doFirstPipeReadFile(FirstPipeArg &p, DataBuffer &halfBlock, FILE *
     readState = fread(readData.dataBuf, 1, readData.readBufSize, fpr);
     if (readState == 0) { return 0; }
 
-    //if (p.readOrder == 278) {
-    //    spdlog::info("last remain, blocklen: {}, last load: {}", halfBlock.curLen, halfBlock.readPos);
-    //}
+    if (p.readOrder == 483) {
+        spdlog::info("last remain, blocklen: {}, last load: {}", halfBlock.curLen, halfBlock.readPos);
+    }
 
     readData.startAddrArr.clear();
 
@@ -291,7 +291,7 @@ static size_t doFirstPipeReadFile(FirstPipeArg &p, DataBuffer &halfBlock, FILE *
         readData.startAddrArr.push_back(readData.blockBuf);
     }
     /* 解析读入buf中的文件数据，计算包含的每个block的长度信息和起始地址 */
-    while (curReadPos + BLOCK_HEADER_LENGTH < readState) { /* 确保能解析block长度 */
+    while (curReadPos + BLOCK_HEADER_LENGTH <= readState) { /* 确保能解析block长度 */
         blockLen = unpackInt16(&readData.dataBuf[curReadPos + 16]) + 1;
         if (blockLen > maxBlockLen) { maxBlockLen = blockLen; }
         if (curReadPos + blockLen <= readState) { /* 完整的block数据在buf里 */
@@ -307,11 +307,11 @@ static size_t doFirstPipeReadFile(FirstPipeArg &p, DataBuffer &halfBlock, FILE *
     if (halfBlock.readPos > 0) {
         memcpy(halfBlock.data, &readData.dataBuf[curReadPos], halfBlock.readPos);  // 将不完整的block拷贝到halfBlock
     }
-    //if (p.readOrder == 277) {
-    //    spdlog::info("tail - last remain, blocklen: {}, last load: {}", halfBlock.curLen, halfBlock.readPos);
-    //}
-    //spdlog::info("block num-1: {}", readData.startAddrArr.size());
-    //spdlog::info("max block len: {}", maxBlockLen);
+    if (p.readOrder == 482) {
+         spdlog::info("tail - last remain, blocklen: {}, last load: {}", halfBlock.curLen, halfBlock.readPos);
+    }
+    // spdlog::info("block num-1: {}", readData.startAddrArr.size());
+    spdlog::info("read order: {}, max block len: {}", p.readOrder, maxBlockLen);
     
     return readState;
 }