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07-14-2018
05:08 PM
@Shu
Your idea make sense. But can I achieve the same with QueryDatabase processor as I dont waana to change the design now. There are multiple flows running.
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07-14-2018
09:43 AM
I have used Querydatabase provessor of NiFi to extract data from Oracle in incremental fashion. I have 2 nodes cluster of NiFi with a good configuration. But as QueryDatabase is designed to run only on the primary node, my one node is over-utilized and another one is under-utilized. How can I make my cluster fully utilized. I have multiple tables in Oracle and the load is getting incrase on only one of the node.
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07-08-2018
07:42 PM
Thanks Shu for the response. Here I need to provide my own schema. I created the schema in Schema registry and trying to apply the same. My intention is to convert the datatype(from binary to Long)..
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07-08-2018
05:43 AM
I am using ExecuteSQL to extract data from Oracle. While retrieving the records, data type of NUMBER is getting converted to BYTES. So to keep the Number to long/double I am using "ConvertRecord" processor. In "Convert Record" processor, I choose AvroReader using embedded schema and for AvroRecordSerWriter used external schema to change the bytes datatypes to long/int. But once the processor executes, I saw that the schema is getting lost as I am not able to convert to orc in order to create Hive table. Is this is any kind of bug?
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07-08-2018
05:31 AM
Thanks Matt.. your explanation does make sense.
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06-26-2018
02:00 PM
This can be very easily achivable using NiFi. Check queryDatabase processor or ExecuteSQL
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06-26-2018
01:58 PM
While running the querydatabase processor in NiFi some records are getting lost. I am try to pull the data from Oracle DB and the maximum-column-value is a created Date of the date datatype. There is no timestamp attached to that(23-JUN-18) . While triggering the job every 5 mins to achieve near-real time ingestion some records are getting lost. I am not sure whether this is happening due to time stamp not present in the table OR whether this can be a synchronization issue like while querying the DB if new records got inserted.
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02-21-2018
09:09 AM
This generally occur if one select either wrong OS or OS version while creating cluster in "Launch wizard"
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