Github user JPercivall commented on a diff in the pull request: https://github.com/apache/nifi/pull/178#discussion_r50213360 --- Diff: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ExecuteSQL.java --- @@ -164,17 +166,31 @@ public void process(final OutputStream out) throws IOException { }); // set attribute how many rows were selected - outgoing = session.putAttribute(outgoing, RESULT_ROW_COUNT, nrOfRows.get().toString()); + fileToProcess = session.putAttribute(fileToProcess, RESULT_ROW_COUNT, nrOfRows.get().toString()); - logger.info("{} contains {} Avro records; transferring to 'success'", new Object[] {outgoing, nrOfRows.get()}); - session.getProvenanceReporter().modifyContent(outgoing, "Retrieved " + nrOfRows.get() + " rows", stopWatch.getElapsed(TimeUnit.MILLISECONDS)); - session.transfer(outgoing, REL_SUCCESS); + logger.info("{} contains {} Avro records; transferring to 'success'", + new Object[] {fileToProcess, nrOfRows.get()}); + session.getProvenanceReporter().modifyContent(fileToProcess, "Retrieved " + nrOfRows.get() + " rows", + stopWatch.getElapsed(TimeUnit.MILLISECONDS)); + session.transfer(fileToProcess, REL_SUCCESS); } catch (final ProcessException | SQLException e) { - if (incoming == null) { - logger.error("Unable to execute SQL select query {} due to {}. No incoming flow file to route to failure", new Object[] {selectQuery, e}); + if (fileToProcess == null) { + // This can happen if any exceptions occur while setting up the connection, statement, etc. + logger.error("Unable to execute SQL select query {} due to {}. No incoming flow file to route to failure", + new Object[] {selectQuery, e}); + context.yield(); } else { - logger.error("Unable to execute SQL select query {} for {} due to {}; routing to failure", new Object[] {selectQuery, incoming, e}); - session.transfer(incoming, REL_FAILURE); + if(context.hasIncomingConnection()) { + logger.error("Unable to execute SQL select query {} for {} due to {}; routing to failure", + new Object[] {selectQuery, fileToProcess, e}); + session.transfer(fileToProcess, REL_FAILURE); --- End diff -- I think this snuck in there.
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