You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@impala.apache.org by "Kurt Deschler (Jira)" <ji...@apache.org> on 2021/02/12 17:03:00 UTC

[jira] [Created] (IMPALA-10504) Add tracing for remote block reads

Kurt Deschler created IMPALA-10504:
--------------------------------------

             Summary: 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


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}
 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)