[jira] [Created] (GEODE-3996) CacheWriter methods that call EntryEvent.getOldValue may see it return null even when a non-null old value exists

[Darrel Schneider (JIRA)]

Darrel Schneider created GEODE-3996:
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             Summary: CacheWriter methods that call EntryEvent.getOldValue may 
see it return null even when a non-null old value exists
                 Key: GEODE-3996
                 URL: https://issues.apache.org/jira/browse/GEODE-3996
             Project: Geode
          Issue Type: Bug
          Components: regions
            Reporter: Darrel Schneider


If a region configures eviction with overflow to disk then it is possible that 
a CacheWriter method that calls EntryEvent.getOldValue may see it return null. 
This happens when the old value for that entry was evicted to disk.
In the case of a CacheWriter, geode should in this case ask for the old value 
that is on disk and return it.




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