IGNITE-23733 Sql. Fix flaky test ItSqlQueriesSystemViewTest.multiStatement #4767
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https://issues.apache.org/jira/browse/IGNITE-23733
The problem is that the test code assumed that the cursor closing and the removal of this query from the registry (
QueryExecutor.runningQueries
) were synchronized but this is not true.So the test must take into account that after closing the cursor we can observe the query among running for some time.