Alexandr Kuramshin created IGNITE-7095:
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Summary: JdbcConnection hard linked in IgniteH2Indexing preventing
old connections from closing
Key: IGNITE-7095
URL: https://issues.apache.org/jira/browse/IGNITE-7095
Project: Ignite
Issue Type: Bug
Components: sql
Affects Versions: 2.3
Reporter: Alexandr Kuramshin
Fix For: 2.4, 2.5
Every time a new thread performs {{SqlFieldsQuery}} the new
{{org.h2.jdbc.JdbcConnection}} will be created and added to the
{{org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing#conns}}.
Such hard link prevents from the {{org.h2.util.CloseWatcher}} to be enqueued
and old connections will remain in heap even after the thread exits.
After some number of SQL queries the {{java.lang.OutOfMemoryError}} will occur.
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