Comments (3)
This causes the metric FailedQuery
to surge.
from clickhouse.
It might be possible to improve this, but it's expected in order to not waste resources.
from clickhouse.
We also observed the same problem recently. After the upgrade of one of the clusters from 22.3 to 23.8 the number of QUERY_WAS_CANCELLED for non-initial queries jumped high (the same query always).
The real reason was not the LIMIT, but the INNER JOIN where the right side returned the empty set. (after that the left subquery was cancelled, which is good, but it was not obvious - required deeper look to debug / understand).
Initiator-side message was also not transparent enough
StorageDistributed (...): (10.166.2.140:9000) Cancelling query because enough data has been read
from clickhouse.
Related Issues (20)
- Test `03198_dynamic_read_subcolumns` is flaky
- Subquery and main query can read from different set of data parts of a single MergeTree table with ongoing inserts
- Single thread is always used to prepare data set for executable tableUdf HOT 2
- Ignoring user privileges for ON CLUSTER commands HOT 8
- url function is unstoppable (and it is not good:)
- Test `00180_no_seek_avoiding_when_reading_from_cache` is flaky HOT 15
- Subqueries of `[GLOBAL] IN` are not executed in parallel HOT 1
- When executing the ATTACH partition file operation in ClickHouse, the server's memory usage decreases significantly. HOT 1
- LDAP method `verification_cooldown` not effective
- Lightweight delete disable the trivial count optimization forever (don't work even after table optimize & reattach) HOT 3
- Test `03144_parallel_alter_add_drop_column_zookeeper_on_steroids` is flaky
- javaHash sharding algorithm implementation HOT 2
- Reading a Delta Table that has a partition value with a whitespace fails
- SHOW CREATE TABLE Output With Quotes Instead of Backticks
- Object storages with s3_create_new_file_on_insert = 1 doesn't work properly after server restart
- Add support for processing ddsketch data type as input HOT 7
- about javaHash HOT 1
- Full Join Using has strange behaviour
- Crash Bug - Segmentation fault - Address: NULL pointer. Access: read. Address not mapped to object. HOT 1
- AzureBlobStorage fails with named collections
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from clickhouse.