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https://issues.apache.org/jira/browse/IMPALA-6020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16491008#comment-16491008
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Alex Rodoni commented on IMPALA-6020:
-------------------------------------
[~dtsirogiannis] [~balazsj_impala_220b] Could you take a look at the
description and see if the statement should be removed or changed?
Thanks!
> REFRESH statement cannot detect HDFS block movement
> ---------------------------------------------------
>
> Key: IMPALA-6020
> URL: https://issues.apache.org/jira/browse/IMPALA-6020
> Project: IMPALA
> Issue Type: Bug
> Components: Docs
> Affects Versions: Impala 2.8.0, Impala 2.9.0, Impala 2.10.0
> Reporter: Jim Apple
> Assignee: Alex Rodoni
> Priority: Major
>
> In the release notes, it says
> http://impala.apache.org/docs/build/html/topics/impala_new_features.html
> {quote}The REFRESH statement now updates information about HDFS block
> locations. Therefore, you can perform a fast and efficient REFRESH after
> doing an HDFS rebalancing operation instead of the more expensive INVALIDATE
> METADATA statement.
> {quote}
> However there is no change in HDFS or Impala side to support this. There may
> be some misunderstanding. After hdfs load balancing, user still needs to run
> INVALIDATE METADATA <table> to get latest block metadata.
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