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https://issues.apache.org/jira/browse/IMPALA-10504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kurt Deschler reassigned IMPALA-10504:
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Assignee: Kurt Deschler
> Add tracing for remote block reads
> ----------------------------------
>
> Key: IMPALA-10504
> URL: https://issues.apache.org/jira/browse/IMPALA-10504
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Kurt Deschler
> Assignee: Kurt Deschler
> Priority: Major
>
> While chasing performance issues, there were a large number of remote block
> read messages in the logs. Need tracing to track down the source of these.
> {noformat}
> Errors: Read 3.07 GB of data across network that was expected to be local.
> Block locality metadata for table 'tpcds_600_parquet.store_sales' may be
> stale.
> This only affects query performance and not result correctness.
> One of the common causes for this warning is HDFS rebalancer moving some of
> the file's blocks.
> If the issue persists, consider running "INVALIDATE METADATA
> `tpcds_600_parquet`.`store_sales`"{noformat}
>
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