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https://issues.apache.org/jira/browse/HIVE-15943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15870510#comment-15870510
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Siddharth Seth commented on HIVE-15943:
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Would be very useful. Especially if it is at the query level.
Could aggregate this at the daemon level as well.
> LLAP: Consider adding counter to indicate number of times LLAP IO reader got
> disabled
> -------------------------------------------------------------------------------------
>
> Key: HIVE-15943
> URL: https://issues.apache.org/jira/browse/HIVE-15943
> Project: Hive
> Issue Type: Bug
> Components: llap
> Reporter: Rajesh Balamohan
> Priority: Minor
>
> https://github.com/apache/hive/blob/master/llap-server/src/java/org/apache/hadoop/hive/llap/io/api/impl/LlapRecordReader.java#L174
> Sometimes, due to schema evolution checks, LLAP IO reader could be skipped
> and reader falls back to inputformat's recordreader. Currently this
> information is embedded in logs. It would be helpful to surface this in
> counters which can be used for query analysis.
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