Nimrod Avni created NIFI-6130:
---------------------------------
Summary: Add More information about exceptions from record
readers/writers
Key: NIFI-6130
URL: https://issues.apache.org/jira/browse/NIFI-6130
Project: Apache NiFi
Issue Type: Improvement
Affects Versions: 1.9.0
Reporter: Nimrod Avni
Attachments: image-2019-03-18-21-46-22-468.png,
image-2019-03-18-21-47-16-888.png
When using record readers and writers i ran into a problem where i tried to
give it a CSV with the same header twice, i.e something like
------------------------------------------
header1,header2,header1
a,b,c
------------------------------------------
when the reader tried to parse the flowfile as records it threw this error:
"Failed to read Header line from CSV"
Which is not very indicative, when i went ahead and debugged the source code i
could see the real error is:
java.lang.IllegalArgumentException: The header contains a duplicate name:
"header1" in [header1, header2, header1]
(Pictures are provided)
This is a case i ran into recently, i have tried to read an avro file which has
a '#' (hashtag) character in one of the headers, which is illegal in the avro
schema defenition.
but the error i got there was : "failed to parse incoming data",
and again, when i debugged the code i found the read error
what the main point is to give a more indicative error message for record
readers / writers, which not only gives the error itself but its cause
i could probably look up many more reasons readers / writers could fail and
they will not give a good error message, but i believe these 2 are fine as an
example
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