add retry in pull sparse (#33812)

* add retry in pull sparse

* retry

paddle/fluid/framework/fleet/fleet_wrapper.cc

@@ -551,18 +551,38 @@ void FleetWrapper::PullSparseVarsSync(
   for (auto& t : *fea_values) {
     pull_result_ptr.push_back(t.data());
   }
+
+  int32_t cnt = 0;
+  while (true) {
+    pull_sparse_status.clear();
     auto status = pslib_ptr_->_worker_ptr->pull_sparse(
         pull_result_ptr.data(), table_id, fea_keys->data(), fea_keys->size());
     pull_sparse_status.push_back(std::move(status));
+    bool flag = true;
     for (auto& t : pull_sparse_status) {
       t.wait();
-    auto status = t.get();
+      int32_t status = -1;
+      try {
+        status = t.get();
+      } catch (const std::future_error& e) {
+        VLOG(0) << "Caught a future_error with code" << e.code()
+                << ", Message:" << e.what();
+      }
       if (status != 0) {
-      LOG(ERROR) << "fleet pull sparse failed, status[" << status << "]";
+        VLOG(0) << "fleet pull sparse failed, status[" << status << "]";
         sleep(sleep_seconds_before_fail_exit_);
+        flag = false;
+        cnt++;
+      }
+      if (cnt > 3) {
+        VLOG(0) << "fleet pull sparse failed, retry 3 times";
         exit(-1);
       }
     }
+    if (flag) {
+      break;
+    }
+  }
 #endif
 }