weiwenda created LIVY-545:
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Summary: Eldest Statement will be discarded even if user never get
its result
Key: LIVY-545
URL: https://issues.apache.org/jira/browse/LIVY-545
Project: Livy
Issue Type: Bug
Components: REPL
Affects Versions: 0.5.0
Reporter: weiwenda
1. when repl.session's statement num has reach threshold which is configured by
livy.rsc.retained-statements, default as 100. The submit of 101th statement
will lead to the discard of the eldest statement (should be No.1).
2. The discard means this statement is not attainable anymore. And if user
forget to get the result of this discarded statement before or didn't request
the result in time, he must resubmit same statement again hoping server won't
discard again.
3. In above workflow, cluster do some unnecessary effort. If the discarded
statement need hours of time to execute, this serve mode will waste a lot of
money.
4. maybe resolve this problem by allow persist statement or discard statement
that have be read in priority.
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