From 17ce71ce3dfb22bb54a5911968f058a596e547c8 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Wed, 21 Jul 2021 03:38:55 +0300
Subject: [PATCH] Fix flaky test 01509_check_many_parallel_quorum_inserts

---
 .../01509_check_many_parallel_quorum_inserts_long.sh  | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tests/queries/0_stateless/01509_check_many_parallel_quorum_inserts_long.sh b/tests/queries/0_stateless/01509_check_many_parallel_quorum_inserts_long.sh
index b71654e7e6cc..187357b94e23 100755
--- a/tests/queries/0_stateless/01509_check_many_parallel_quorum_inserts_long.sh
+++ b/tests/queries/0_stateless/01509_check_many_parallel_quorum_inserts_long.sh
@@ -16,13 +16,20 @@ for i in $(seq 1 $NUM_REPLICAS); do
 done
 
 function thread {
-    $CLICKHOUSE_CLIENT --insert_quorum 5 --insert_quorum_parallel 1 --query "INSERT INTO r$1 SELECT $2"
+    while true
+    do
+        $CLICKHOUSE_CLIENT --insert_quorum 5 --insert_quorum_parallel 1 --query "INSERT INTO r$1 SELECT $2" && break
+        sleep 0.1
+    done
 }
 
 for i in $(seq 1 $NUM_REPLICAS); do
     for j in {0..9}; do
         a=$((($i - 1) * 10 + $j))
-        thread $i $a &
+
+        # Note: making 100 connections simultaneously is a mini-DoS when server is build with sanitizers and CI environment is overloaded.
+        # That's why we repeat "socket timeout" errors.
+        thread $i $a 2>&1 | grep -v -P 'SOCKET_TIMEOUT|NETWORK_ERROR|^$' &
     done
 done