Memory "leak" when setting a query timeout
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Key: DERBY-5375
URL: https://issues.apache.org/jira/browse/DERBY-5375
Project: Derby
Issue Type: Bug
Components: JDBC
Affects Versions: 10.8.1.2
Reporter: Thomas Brandl
When setting a query timeout, a new CancelQueryTask is created and scheduled.
This CancelQueryTask is still held in the java.util.Timer class's task queue
even when the query is already finished until the query timeout is reached.
For example, if i set a query timeout of 2h using
statement.setQueryTimeout(7200) this means that the CancelQueryTask will remain
for 2 hours even if the query is finished within 1 second. In scenarios with
high load, this can lead to Out of Memory Situations.
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