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8b08d56473
It is possible that the next after INSERT query will be executed only
when INSERT finished, it is unlikely, but it happened few times on CI
[1]:
2022.08.05 19:32:13.964046 [ 1565 ] {insert-qjnxxoaebk} <Debug> executeQuery: (from [::1]:57512) (comment: 02352_rwlock.sh) INSERT INTO test_7ybr6x_ordinary.data_02352 SELECT sleepEachRow(1) FROM numbers(20) GROUP BY number (stage: Complete)
...
2022.08.05 19:32:14.945738 [ 1594 ] {245b7446-58da-452b-9669-55dad643bc34} <Debug> executeQuery: (from [::1]:57516) (comment: 02352_rwlock.sh) select count() from system.processes where query_id = 'insert-qjnxxoaebk' (stage: Complete)
...
2022.08.05 19:32:33.997257 [ 1565 ] {insert-qjnxxoaebk} <Debug> TCPHandler: Processed in 20.056755494 sec.
...
2022.08.05 19:32:34.614789 [ 908 ] {3be7ade3-6461-4906-8767-7cc11f83a0b8} <Debug> executeQuery: (from [::1]:57522) (comment: 02352_rwlock.sh) select count() from system.processes where query_id = 'drop-zoyhjyewja' (stage: Complete)
...
2022.08.05 19:32:34.674039 [ 1175 ] {drop-zoyhjyewja} <Debug> executeQuery: (from [::1]:57528) (comment: 02352_rwlock.sh) DROP TABLE test_7ybr6x_ordinary.data_02352 SYNC (stage: Complete)
...
[1]: https://s3.amazonaws.com/clickhouse-test-reports/39826/8e545958495937c6c6e61951601a6470119d0813/stateless_tests__debug__[1/3].html
And to avoid flakiness in this case, add a retry loop and no-parallel
tag.
Refs: #38864
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
88 lines
3.1 KiB
Bash
Executable File
88 lines
3.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Tags: no-parallel
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# Tag no-parallel -- to avoid running it in parallel, this will avoid possible issues due to high pressure
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# Test that ensures that WRITE lock failure notifies READ.
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# In other words to ensure that after WRITE lock failure (DROP),
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# READ lock (SELECT) available instantly.
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CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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# shellcheck source=../shell_config.sh
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. "$CUR_DIR"/../shell_config.sh
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function wait_query_by_id_started()
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{
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local query_id=$1 && shift
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# wait for query to be started
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while [ "$($CLICKHOUSE_CLIENT "$@" -q "select count() from system.processes where query_id = '$query_id'")" -ne 1 ]; do
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if [ "$(
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$CLICKHOUSE_CLIENT -nm -q "
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system flush logs;
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select count() from system.query_log
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where
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event_date >= yesterday() and
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current_database = '$CLICKHOUSE_DATABASE' and
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type = 'QueryFinish' and
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query_id = '$query_id'
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"
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)" -eq 1 ]; then
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return 1
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else
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sleep 0.1
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fi
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done
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return 0
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}
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# to avoid removal via separate thread
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$CLICKHOUSE_CLIENT -q "CREATE DATABASE ${CLICKHOUSE_DATABASE}_ordinary Engine=Ordinary" --allow_deprecated_database_ordinary=1
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# It is possible that the subsequent after INSERT query will be processed
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# only after INSERT finished, it is unlikely, but it happens few times in
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# debug build on CI, so if this will happen, then DROP query will be
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# finished instantly, and to avoid flakiness we will retry in this case
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while :; do
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$CLICKHOUSE_CLIENT -nm -q "
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DROP TABLE IF EXISTS ${CLICKHOUSE_DATABASE}_ordinary.data_02352;
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CREATE TABLE ${CLICKHOUSE_DATABASE}_ordinary.data_02352 (key Int) Engine=Null();
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"
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insert_query_id="insert-$(random_str 10)"
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# 20 seconds sleep
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$CLICKHOUSE_CLIENT --query_id "$insert_query_id" -q "INSERT INTO ${CLICKHOUSE_DATABASE}_ordinary.data_02352 SELECT sleepEachRow(1) FROM numbers(20) GROUP BY number" &
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if ! wait_query_by_id_started "$insert_query_id"; then
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wait
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continue
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fi
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drop_query_id="drop-$(random_str 10)"
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# 10 second wait
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$CLICKHOUSE_CLIENT --query_id "$drop_query_id" -q "DROP TABLE ${CLICKHOUSE_DATABASE}_ordinary.data_02352 SYNC" --lock_acquire_timeout 10 > >(
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grep -m1 -o 'WRITE locking attempt on ".*" has timed out'
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) 2>&1 &
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if ! wait_query_by_id_started "$drop_query_id"; then
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wait
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continue
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fi
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# Check INSERT query again, and retry if it does not exist.
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if ! wait_query_by_id_started "$insert_query_id"; then
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wait
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continue
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fi
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# NOTE: we need to run SELECT after DROP and
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# if the bug is there, then the query will wait 20 seconds (INSERT), instead of 10 (DROP) and will fail
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#
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# 11 seconds wait (DROP + 1 second lag)
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$CLICKHOUSE_CLIENT -q "SELECT * FROM ${CLICKHOUSE_DATABASE}_ordinary.data_02352" --lock_acquire_timeout 11
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# wait DROP and INSERT
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wait
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break
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done | uniq
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$CLICKHOUSE_CLIENT -q "DROP DATABASE ${CLICKHOUSE_DATABASE}_ordinary"
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