fix a bug in prefetch

a49ee22e · qiaolongfei · a77dfeee · a49ee22e
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paddle/fluid/operators/detail/grpc_server.cc paddle/fluid/operators/detail/grpc_server.cc +1 -1

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--- a/paddle/fluid/operators/detail/grpc_server.cc
+++ b/paddle/fluid/operators/detail/grpc_server.cc
@@ -169,7 +169,7 @@ class RequestPrefetch final : public RequestBase {
    auto scope = request_->GetMutableLocalScope();
    auto invar = scope->FindVar(in_var_name);
-    framework::Variable* outvar = scope->FindVar(out_var_name);
+    framework::Variable* outvar = scope->Var(out_var_name);
    request_handler_->Handle(in_var_name, scope, invar, &outvar, out_var_name);