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Reduce flakiness of 01455_opentelemetry_distributed

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This commit is contained in:
Michael Kolupaev 2023-09-28 19:34:23 +00:00
parent 383f8c58b6
commit 4b43bf0fd1
1 changed files with 5 additions and 3 deletions
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8
tests/queries/0_stateless/01455_opentelemetry_distributed.sh
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@ -107,7 +107,7 @@ check_log
echo "===sampled==="
query_id=$(${CLICKHOUSE_CLIENT} -q "select lower(hex(reverse(reinterpretAsString(generateUUIDv4()))))")
for i in {1..20}
for i in {1..40}
do
${CLICKHOUSE_CLIENT} \
--opentelemetry_start_trace_probability=0.5 \
@ -126,8 +126,10 @@ wait
${CLICKHOUSE_CLIENT} -q "system flush logs"
${CLICKHOUSE_CLIENT} -q "
-- expect 20 * 0.5 = 10 sampled events on average
select if(2 <= count() and count() <= 18, 'OK', 'Fail')
-- expect 40 * 0.5 = 20 sampled events on average;
-- probability of getting 0, 1, 39, or 40 sampled events: 82/2^40 = 1 in 13.4 B runs;
-- if there are 10k tests run 1k times per day, that's a false positive every 3.7 years
select if(2 <= count() and count() <= 38, 'OK', 'Fail')
from system.opentelemetry_span_log
where operation_name = 'query'
and attribute['clickhouse.query_id'] like '$query_id-%'