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https://issues.apache.org/jira/browse/HIVE-15773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16996958#comment-16996958
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bianqi commented on HIVE-15773:
-------------------------------
When we use a single CPU to run the spark-sql program, there will be no
exceptions, but if we use multiple CPU to run, it will report an error.
> HCatRecordObjectInspectorFactory is not thread safe
> ---------------------------------------------------
>
> Key: HIVE-15773
> URL: https://issues.apache.org/jira/browse/HIVE-15773
> Project: Hive
> Issue Type: Bug
> Reporter: David Phillips
> Priority: Major
> Attachments: HIVE-15773.2.patch, HIVE-15773.3.patch, HIVE-15773.patch
>
>
> {{HashMap}} used without synchronization for the caches, which makes the code
> unsafe for use in a multi-threaded environment such as Presto (or Spark?).
> The simple fix is to switch them to {{ConcurrentHashMap}}.
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