zhannngchen commented on code in PR #43509:
URL: https://github.com/apache/doris/pull/43509#discussion_r1834163153


##########
cloud/src/meta-service/meta_service.cpp:
##########
@@ -1923,11 +1925,37 @@ void 
MetaServiceImpl::get_delete_bitmap(google::protobuf::RpcController* control
         std::unique_ptr<RangeGetIterator> it;
         int64_t last_ver = -1;
         int64_t last_seg_id = -1;
+        int64_t round = 0;
         do {
-            err = txn->get(start_key, end_key, &it);
+#ifdef UNIT_TEST
+            err = txn->get(start_key, end_key, &it, true, 2);
+#else
+            err = txn->get(start_key, end_key, &it, true);
+#endif
+            TEST_SYNC_POINT_CALLBACK("get_delete_bitmap_err", &round, &err);
+            while (err == TxnErrorCode::TXN_TOO_OLD &&
+                   retry < config::max_get_delete_bitmap_retry_times) {
+                LOG(INFO) << "retry get delete bitmap, code=" << 
MetaServiceCode_Name(code)
+                          << ", retry=" << retry << ", internal round=" << 
round;
+                txn = nullptr;
+                err = txn_kv_->create_txn(&txn);
+                if (err != TxnErrorCode::TXN_OK) {
+                    code = cast_as<ErrCategory::CREATE>(err);
+                    ss << "failed to init txn, retry=" << retry << ", internal 
round=" << round;
+                    msg = ss.str();
+                    return;
+                }
+#ifdef UNIT_TEST
+                err = txn->get(start_key, end_key, &it, true, 2);

Review Comment:
   make sure all delete bitmap keys are committed before rowset keys, so that 
the snapshot read won't miss data.



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