From 420180c6d7a5ad00870f099d2e2c79ad367fe9ee Mon Sep 17 00:00:00 2001
From: Yousuk Seung <ysseung@google.com>
Date: Wed, 22 Feb 2023 10:41:07 -0800
Subject: [PATCH] deflake server_load_reporting_end2end_test (#32434)

This test is flaky only with iomgr, this fix will likely fix this.

<!--

If you know who should review your pull request, please assign it to
that
person, otherwise the pull request would get assigned randomly.

If your pull request is for a specific language, please add the
appropriate
lang label.

-->
---
 test/cpp/end2end/server_load_reporting_end2end_test.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/cpp/end2end/server_load_reporting_end2end_test.cc b/test/cpp/end2end/server_load_reporting_end2end_test.cc
index 3ee3af7b4e7..cd8d3477c73 100644
--- a/test/cpp/end2end/server_load_reporting_end2end_test.cc
+++ b/test/cpp/end2end/server_load_reporting_end2end_test.cc
@@ -30,6 +30,7 @@
 #include <grpcpp/ext/server_load_reporting.h>
 #include <grpcpp/server_builder.h>
 
+#include "src/core/ext/filters/client_channel/backup_poller.h"
 #include "src/core/lib/gprpp/crash.h"
 #include "src/proto/grpc/lb/v1/load_reporter.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
@@ -200,5 +201,8 @@ TEST_F(ServerLoadReportingEnd2endTest, BasicReport) {
 int main(int argc, char** argv) {
   grpc::testing::TestEnvironment env(&argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
+  // Make the backup poller poll very frequently in order to pick up
+  // updates from all the subchannels's FDs.
+  GPR_GLOBAL_CONFIG_SET(grpc_client_channel_backup_poll_interval_ms, 1);
   return RUN_ALL_TESTS();
 }