Jim Apple created IMPALA-6020:
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Summary: 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 2.9.0, Impala 2.8.0, Impala 2.10.0
Reporter: Jim Apple
Assignee: John Russell
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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