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https://github.com/ClickHouse/ClickHouse.git
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52 lines
2.2 KiB
Bash
Executable File
52 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -e
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CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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. $CURDIR/../shell_config.sh
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$CLICKHOUSE_CLIENT -q "DROP TABLE IF EXISTS cannot_kill_query"
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$CLICKHOUSE_CLIENT -q "CREATE TABLE cannot_kill_query (x UInt64) ENGINE = MergeTree ORDER BY x" &> /dev/null
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$CLICKHOUSE_CLIENT -q "INSERT INTO cannot_kill_query SELECT * FROM numbers(10000000)" &> /dev/null
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# This SELECT query will run for a long time. It's used as bloker for ALTER query. It will be killed with SYNC kill.
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query_for_pending="SELECT count() FROM cannot_kill_query WHERE NOT ignore(sleep(1)) SETTINGS max_threads = 1, max_block_size = 1"
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$CLICKHOUSE_CLIENT -q "$query_for_pending" &>/dev/null &
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sleep 1 # queries should be in strict order
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# This ALTER query will wait until $query_for_pending finished. Also it will block $query_to_kill.
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$CLICKHOUSE_CLIENT -q "ALTER TABLE cannot_kill_query MODIFY COLUMN x UInt64" &>/dev/null &
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sleep 1
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# This SELECT query will also run for a long time. Also it's blocked by ALTER query. It will be killed with ASYNC kill.
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# This is main idea which we check -- blocked queries can be killed with ASYNC kill.
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query_to_kill="SELECT sum(1) FROM cannot_kill_query WHERE NOT ignore(sleep(1)) SETTINGS max_threads = 1"
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$CLICKHOUSE_CLIENT -q "$query_to_kill" &>/dev/null &
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sleep 1 # just to be sure that kill of $query_to_kill will be executed after $query_to_kill.
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# Kill $query_to_kill with ASYNC kill. We will check that information about KILL is not lost.
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$CLICKHOUSE_CLIENT -q "KILL QUERY WHERE query='$query_to_kill' ASYNC" &>/dev/null
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sleep 1
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# Kill $query_for_pending SYNC. This query is not blocker, so it should be killed fast.
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timeout 20 $CLICKHOUSE_CLIENT -q "KILL QUERY WHERE query='$query_for_pending' SYNC" &>/dev/null
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# Both queries have to be killed, doesn't matter with SYNC or ASYNC kill
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for run in {1..15}
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do
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sleep 1
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no_first_query=`$CLICKHOUSE_CLIENT -q "SELECT count() FROM system.processes where query='$query_for_pending'"`
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no_second_query=`$CLICKHOUSE_CLIENT -q "SELECT count() FROM system.processes where query='$query_to_kill'"`
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if [ $no_first_query == "0" ] && [ $no_second_query == "0" ]; then
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echo "killed"
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break
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fi
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done
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$CLICKHOUSE_CLIENT -q "DROP TABLE IF EXISTS cannot_kill_query" &>/dev/null
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