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From "Ken Geis (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-7221) JDBCOutputFormat swallows errors on last batch
Date Tue, 18 Jul 2017 17:11:00 GMT
Ken Geis created FLINK-7221:

             Summary: JDBCOutputFormat swallows errors on last batch
                 Key: FLINK-7221
                 URL: https://issues.apache.org/jira/browse/FLINK-7221
             Project: Flink
          Issue Type: Bug
          Components: Batch Connectors and Input/Output Formats
    Affects Versions: 1.3.1
         Environment: Java 1.8.0_131, PostgreSQL driver 42.1.3
            Reporter: Ken Geis

I have a data set with ~17000 rows that I was trying to write to a PostgreSQL table that I
did not (yet) have permission on. No data was loaded, and Flink did not report any problem
outputting the data set. The only indication I found of my problem was in the PostgreSQL log.

With the default parallelism (8) and the default batch interval (5000), my batches were ~2000
rows each, so they were never executed in {{JDBCOutputFormat.writeRecord(..)}}. {{JDBCOutputFormat.close()}}
does a final call on {{upload.executeBatch()}}, but if there is a problem, it is logged at
INFO level and not rethrown. 

If I decrease the batch interval to 100 or 1000, then an error is properly reported.

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