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https://issues.apache.org/jira/browse/IMPALA-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833215#comment-16833215
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ASF subversion and git services commented on IMPALA-4865:
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Commit 23d7a6dce6ce4287edf20e3f63b225822cb88598 in impala's branch
refs/heads/master from Tim Armstrong
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=23d7a6d ]
IMPALA-8492: reenable large string tests in docker
IMPALA-4865 is fixed so these now pass. I noticed
that the IMPALA-4874 test occasionally hit
"Memory Limit Exceeded" when looped, so I reduced
the data size there slightly.
Testing:
Looped the tests locally against a dockerised minicluster
for a while.
Change-Id: I030f4eff2d3fb771fc92b760efb13170e68285dc
Reviewed-on: http://gerrit.cloudera.org:8080/13233
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Limit size of literal values from constant folding
> --------------------------------------------------
>
> Key: IMPALA-4865
> URL: https://issues.apache.org/jira/browse/IMPALA-4865
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 2.8.0
> Reporter: Henry Robinson
> Assignee: Fang-Yu Rao
> Priority: Major
> Labels: newbie
>
> Consider (from {{test_insert.py}}) the following query:
> {{create table foo as select repeat('AZ', 128 * 1024 * 1024) as s}}
> {{repeat()}} gets constant-folded into a 256MB expression payload, which is
> then transmitted to every fragment instance that evaluates the expression.
> This can lead to timeouts.
> The workaround is {{ENABLE_EXPR_REWRITES=0}}.
> It's not obvious what the answer is - should the FE be aware of the
> serialized size of an expression when deciding whether to constant fold it?
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