Vanco Buca created ARROW-2696:
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Summary: [JAVA] enhance AllocationListener with an
onFailedAllocation() call
Key: ARROW-2696
URL: https://issues.apache.org/jira/browse/ARROW-2696
Project: Apache Arrow
Issue Type: Improvement
Components: Java - Memory
Reporter: Vanco Buca
If an allocation fails, there might be an action taken by user code that will
free up some memory before the allocation can be retried again. This action
could include flushing some temporary buffers, getting rid of some temporarily
cached data, or even spilling state to disk.
Today's code is forced to catch out-of-memory exceptions, and then retry the
operation at a high level. A more elegant way to do this is to have a callback
whenever allocation failed. The callback would inform the allocator whether or
not to retry the allocation.
Since the allocator already has an AllocationListener, it makes sense to
enhance the existing listener with a new method.
{{The proposed signature is:}}
{{ boolean onAllocationFailed(long allocationSize);}}
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