ClickHouse/tests/queries/0_stateless/01085_max_distributed_connections.sh
2022-11-21 15:18:02 +01:00

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#!/usr/bin/env bash
# Tags: distributed, no-random-settings
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
# shellcheck source=../shell_config.sh
. "$CURDIR"/../shell_config.sh
i=0 retries=300
# Sometimes five seconds are not enough due to system overload.
# But if it can run in less than five seconds at least sometimes - it is enough for the test.
while [[ $i -lt $retries ]]; do
opts=(
--max_distributed_connections 20
--max_threads 1
--query "SELECT sum(sleepEachRow(1)) FROM remote('127.{2..21}', system.one)"
--format Null
)
# 10 less then 20 seconds (20 streams), but long enough to cover possible load peaks
# "$@" left to pass manual options (like --experimental_use_processors 0) during manual testing
timeout 10s ${CLICKHOUSE_CLIENT} "${opts[@]}" "$@" && break
((++i))
done