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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (FLINK-1085) Unnecessary failing of GroupReduceCombineDriver
Date Mon, 13 Jul 2015 15:50:05 GMT

     [ https://issues.apache.org/jira/browse/FLINK-1085?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stephan Ewen closed FLINK-1085.
-------------------------------

> Unnecessary failing of GroupReduceCombineDriver
> -----------------------------------------------
>
>                 Key: FLINK-1085
>                 URL: https://issues.apache.org/jira/browse/FLINK-1085
>             Project: Flink
>          Issue Type: Bug
>          Components: Local Runtime
>    Affects Versions: 0.6.1-incubating, 0.7.0-incubating
>            Reporter: Fabian Hueske
>              Labels: starter
>             Fix For: 0.10
>
>
> With a recent update (commit cbbcf7820885a8a9734ffeba637b0182a6637939) the GroupReduceCombineDriver
was changed to not use an asynchronous partial sorter. Instead, the driver fills a sort buffer
with records, sorts it, combines them, clears the buffer, and continues to fill it again.
> The GroupReduceCombineDriver fails if a record cannot be serialized into an empty sort
buffer, i.e., if the record is too large for the buffer.
> Alternatively, we should emit a WARN message for the first record that is too large and
just forward all records which do not fit into the empty sort buffer (maybe continue to count
how many records were simply forwarded and give a second WARN message with this statistic).



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