Abdullah Aqeeli created NIFI-9477:
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Summary: data loss doing Incremental load based on a timestamp
from SQL server using QueryDatabaseTableRecord
Key: NIFI-9477
URL: https://issues.apache.org/jira/browse/NIFI-9477
Project: Apache NiFi
Issue Type: Bug
Components: Core UI
Affects Versions: 1.13.2
Environment: ubuntu 20
2-node cluster using an embedded zk
Reporter: Abdullah Aqeeli
hello all,
We are using Nifi to do an incremental load from SQL Server using
QueryDatabaseTableRecord where max-value column is updated_at column with a
[Datetime2
|https://docs.microsoft.com/en-us/sql/t-sql/data-types/datetime2-transact-sql]data
type. The source tables get updated in milliseconds. We noticed that we are
losing few events doing with each QueryDatabaseTableRecord run. As a
work-around we created a custom processor that subtracts few seconds from the
max-value in the state fetching overlapping events and then we handle any
duplicates later on in the pipeline and it seems to solve the issue. However,
this is not optimal. We'd like to know what's causing the skips. Our assumption
so far is that timestamp datatype accuracy is causing the skips in the
incremental load however we're not sure.
Thanks!
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