Zhijun Fu created ARROW-5402:
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Summary: [Plasma] Pin objects in plasma store
Key: ARROW-5402
URL: https://issues.apache.org/jira/browse/ARROW-5402
Project: Apache Arrow
Issue Type: Improvement
Reporter: Zhijun Fu
Assignee: Zhijun Fu
[https://github.com/apache/arrow/issues/4368]
Sometimes we want to "pin" an object in plasma store - we don't want this
object to be deleted even though there's nobody that's currently referencing
it. In this case, we can specify a flag when creating the object so that it
won't be deleted by LRU cache when its refcnt drops to 0, and can only be
deleted by an explicit {{Delete()}} call.
Currently, we found that an actor FO problem. The actor creation task depends
on a plasma object put by user. After the the actor running for a long time,
the object will be deleted by plasma LRU. Then, an Actor FO happens, the
creation task cannot find the object put by user, so the FO is hanging forever.
Would this make sense to you?
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