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Nifi: ExecuteSQL returns multiple rows of data, but only one entry is written to MongoDB database

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testingsqlflow.jpgI have a query that I execute using ExecuteSQL processor that returns 900 rows of data. It Output is in AVRO format which I convert to JSON (one JSON document per row of data) using ConvertAVROtoJSON processor. The output is then sent to a PutMongo processor. But, only the first row from this processor is written to MongoDB. The others are not written and I get get no errors. Any suggestion on how to make sure all rows are written into MongoDB?

I have attached a diagram of the Nifi flow.

Thanks!

VJ

1 ACCEPTED SOLUTION

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Yes, the query returns over 1300 rows. The ConverttoJSON writes both to MongoDB and to a file (using PutFile). The file gets all the rows - one json document per line. But, MongoDB gets only one record which is the first one.

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Super Collaborator

Try replacing your ConvertAvrotoJSON with a SplitAvro processor. So try a flow like this:

ExecuteSQL > SplitAvro > ConvertAvrotoJSON > PutMongo

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That worked great! Thank you very much! My collection now has over 1300 records as expected.

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Super Collaborator

Sweet. Glad I could help.