Sahil Takiar created IMPALA-8232:
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             Summary: Custom cluster tests should allow setting dfs.client 
settings for impalads
                 Key: IMPALA-8232
                 URL: https://issues.apache.org/jira/browse/IMPALA-8232
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend
            Reporter: Sahil Takiar
            Assignee: Sahil Takiar


Right now, custom cluster tests only allow specifying impalad startup options, 
however, it would be nice if the tests could specify arbitrary HDFS client 
configs as well (e.g. {{dfs.client}} options). This would allow us to increase 
our test integration coverage with different HDFS client setups such as (1) 
disabling short-circuit reads (thus triggering the code path for a remote read) 
(requires setting {{dfs.client.read.shortcircuit}} to false), (2) enabling 
hedged reads (requires setting {{dfs.client.hedged.read.threadpool.size}} to a 
value greater than 0).



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