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From "Alexandr Kuramshin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-7095) JdbcConnection hard linked in IgniteH2Indexing preventing old connections from closing
Date Sat, 02 Dec 2017 14:37:00 GMT
Alexandr Kuramshin created IGNITE-7095:
------------------------------------------

             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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