[jira] [Updated] (NIFI-1409) ExecuteSQL gives transfer error when SQLException occurs with no input flowfile

["Matt Burgess (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-1409?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matt Burgess updated NIFI-1409:
-------------------------------
    Summary: ExecuteSQL gives transfer error when SQLException occurs with no input flowfile  (was: ExecuteSQL gives transfer error when result set has no columns)

> ExecuteSQL gives transfer error when SQLException occurs with no input flowfile
> -------------------------------------------------------------------------------
>
>                 Key: NIFI-1409
>                 URL: https://issues.apache.org/jira/browse/NIFI-1409
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Matt Burgess
>
> When the result set from ExecuteSQL has no columns, a bulletin is issued saying a flowfile was not transferred:
> 13:35:12 ESTERROR05845c66-73a4-49ff-a973-ad986fb651bf
> ExecuteSQL[id=05845c66-73a4-49ff-a973-ad986fb651bf] Unable to execute SQL select query SELECT * FROM test due to org.apache.nifi.processor.exception.ProcessException: org.postgresql.util.PSQLException: The column index is out of range: 1, number of columns: 0.. No incoming flow file to route to failure: org.apache.nifi.processor.exception.ProcessException: org.postgresql.util.PSQLException: The column index is out of range: 1, number of columns: 0.
> 13:35:12 ESTERROR05845c66-73a4-49ff-a973-ad986fb651bf
> ExecuteSQL[id=05845c66-73a4-49ff-a973-ad986fb651bf] ExecuteSQL[id=05845c66-73a4-49ff-a973-ad986fb651bf] failed to process due to org.apache.nifi.processor.exception.FlowFileHandlingException: StandardFlowFileRecord[uuid=c9077d5c-d873-4bf2-a8c0-4cc92a6f3309,claim=,offset=0,name=258316166470532,size=0] transfer relationship not specified; rolling back session: org.apache.nifi.processor.exception.FlowFileHandlingException: StandardFlowFileRecord[uuid=c9077d5c-d873-4bf2-a8c0-4cc92a6f3309,claim=,offset=0,name=258316166470532,size=0] transfer relationship not specified
> The problem seems to be in JdbcCommon.createSchema():
> https://github.com/apache/nifi/blob/nifi-0.4.1/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/JdbcCommon.java#L130
> This line asks for the table name for the first column, and when there are no columns, a SQLException is thrown, which becomes a ProcessException in the ExecuteSQL processor. In addition, the exception handling tries to route the flowfile to failure, but for the newly created flowfile (to contain the result set), the reference has since been lost, and thus the flowfile is never transferred.
> At present, if it desired that an empty result set causes a route to failure, then a workaround is to add a GenerateFlowFile processor (with a 0-byte size) in front of the ExecuteSQL processor. This bypasses the logic error because the incoming flowfile is reused and eventually transferred to failure because of the exception thrown by JdbcCommon.



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