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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 updated IMPALA-10504:
-----------------------------------
Description:
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}
was:
http://gerrit.cloudera.org:8080/17062
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}
> 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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