Ilya Shishkov created IGNITE-24751:
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Summary: Add warning when query pool was exhausted
Key: IGNITE-24751
URL: https://issues.apache.org/jira/browse/IGNITE-24751
Project: Ignite
Issue Type: Sub-task
Reporter: Ilya Shishkov
Attachments: QueryPoolExhaustingTest.patch
When {{QueryBlockingTaskExecutor}} of Calcite engine is used, query pool size
must be larger than any UDF nesting, otherwise query hanging will occur, eg.:
# Query executor size is 2
# Execute SQL containing first UDF
# First UDF inside calls another one UDF
# Second UDF calls any SQL query and hangs
Reproducer: [^QueryPoolExhaustingTest.patch]
It seems, that we need:
# Add detailed warning about deadlock and print information, how kill
problematic query
# Add documentation about proper query thread pool size configuring
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