Files
impala/testdata/workloads/functional-query/queries/QueryTest/large_strings.test
Tim Armstrong 548106f5e1 IMPALA-8451,IMPALA-8905: enable admission control for dockerised tests
This gives us some additional coverage for using admission
control in a simple but realistic configuration.

What are the implications of this change for test stability and
flakiness?

On one hand were are adding some more unpredictability
to tests, because they may be queued for an arbitrary amount of
time. On the other, we can prevent queries from contending over
memory. Currently we rely on luck to prevent concurrent queries
from forcing each other out-of-memory.

I think the unpredictability from the queueing is
preferable, because we can generally work around these by
fixing tests that are sensitive to being queued, whereas
contention over memory requires us to use crude workarounds
like forcing tests to execute serially.

Added observability for the configured queue wait time for each pool.
I noticed that I did not have a direct way to observe the effective
value when I set configs. This is IMPALA-8905.

I had to tweak tests in a few ways:
* Tests with large strings needed higher memory limits.
* Hardcoded instances of default-pool had to handle root.default
  as well.
* test_query_mem_limit needed to run without a mem_limit. I
  created a special pool root.no-limits with no memory limits
  to allow that.

Testing:
Ran the dockerised build 5-6 times to flush out flaky tests.

Change-Id: I7517673f9e348780fcf7cd6ce1f12c9c5a55373a
Reviewed-on: http://gerrit.cloudera.org:8080/13942
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
2019-09-27 01:54:39 +00:00

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====
---- QUERY
set mem_limit=4gb;
# IMPALA-1619 group_concat() error
select length(group_concat(l_comment, "!")) from (
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem) a
---- CATCH
Concatenated string length larger than allowed limit of 1 GB character data
=====
---- QUERY
# IMPALA-2620: Allocation by UDF/UDA need to take into account of memory limit.
SET mem_limit=512m;
select length(group_concat(l_comment, "!")) from (
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem union all
select l_comment from tpch_parquet.lineitem) a
---- CATCH
Memory limit exceeded
====
---- QUERY
#IMPALA-3350: Results of string functions can exceed 1GB.
set mem_limit=4gb;
select length(concat_ws(',', s, s, s, s)) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select length(repeat(s, 10)) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- CATCH
repeat() result is larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select length(lpad(s, 1073741830, '!')) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select length(rpad(s, 1073741830, '~')) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
set mem_limit=4gb;
select space(1073741830);
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select length(regexp_replace(s, '.', '++++++++')) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select length(replace(s, ' ', '++++++++')) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- RESULTS
625718301
=====
---- QUERY
set mem_limit=5gb;
select replace(x, '+', '000') from (select (replace(s, ' ', '++++++++')) x from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2) t3;
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select trunc(timestamp_col, space(1073741830)) from functional.alltypes
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select extract(timestamp_col, space(1073741830)) from functional.alltypes
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select length(madlib_encode_vector(concat_ws(',', s, s, s, s))) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
select length(madlib_decode_vector(concat_ws(',', s, s, s, s))) from (
select group_concat(l_comment, "!") s from (
select l_comment from tpch.lineitem union all
select l_comment from tpch.lineitem) t1
) t2
---- CATCH
String length larger than allowed limit of 1 GB character data
=====
---- QUERY
set mem_limit=4gb;
# IMPALA-4874: Generate a large row made up of multiple large strings to test RPC
# transmission. This uses hashing to make this difficult to compress,
# which results in a larger row batch.
select length(group_concat(h, "!")),
length(group_concat(h, "-"))
from (
select cast(fnv_hash(concat(l_comment, 'a')) as string) as h from tpch_parquet.lineitem union all
select cast(fnv_hash(concat(l_comment, 'b')) as string) as h from tpch_parquet.lineitem union all
select cast(fnv_hash(concat(l_comment, 'c')) as string) as h from tpch_parquet.lineitem union all
select cast(fnv_hash(concat(l_comment, 'd')) as string) as h from tpch_parquet.lineitem) a;
---- TYPES
INT,INT
---- RESULTS
489174530,489174530
=====
---- QUERY
set mem_limit=4gb;
select repeat('the quick brown fox', 1024 * 1024 * 100)
---- CATCH
repeat() result is larger than allowed limit of 1 GB character data
=====