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https://issues.apache.org/jira/browse/HIVE-20274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16562703#comment-16562703
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Prasanth Jayachandran commented on HIVE-20274:
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yeah. agreed. asMap() is just the underlying reference to CHM used by cache. It
will be weak consistency only with iterables (under certain conditions
described in javadoc) other than that it can be drop in replacement.
> HiveServer2 ObjectInspectorFactory leaks for Struct and List object inspectors
> ------------------------------------------------------------------------------
>
> Key: HIVE-20274
> URL: https://issues.apache.org/jira/browse/HIVE-20274
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Affects Versions: 3.0.0, 4.0.0
> Reporter: Gopal V
> Assignee: Prasanth Jayachandran
> Priority: Major
> Attachments: HIVE-20274.1.patch
>
>
> Fix in HIVE-19860 needs to be applied to
> {code}
> static ConcurrentHashMap<ObjectInspector, StandardListObjectInspector>
> cachedStandardListObjectInspector = new
> ConcurrentHashMap<ObjectInspector, StandardListObjectInspector>();
> ...
> static ConcurrentHashMap<ArrayList<List<?>>, StandardStructObjectInspector>
> cachedStandardStructObjectInspector =
> new ConcurrentHashMap<ArrayList<List<?>>,
> StandardStructObjectInspector>();
> ...
> static ConcurrentHashMap<ArrayList<Object>, ColumnarStructObjectInspector>
> cachedColumnarStructObjectInspector =
> new ConcurrentHashMap<ArrayList<Object>,
> ColumnarStructObjectInspector>();
> {code}
> And possibly for
> {code}
> static ConcurrentHashMap<Type, ObjectInspector> objectInspectorCache = new
> ConcurrentHashMap<Type, ObjectInspector>();
> ...
> {code}
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