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https://issues.apache.org/jira/browse/NIFI-15856?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pierre Villard updated NIFI-15856:
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Status: Patch Available (was: Open)
> JsonRecordSetWriter silently ignores Timestamp Format
> -----------------------------------------------------
>
> Key: NIFI-15856
> URL: https://issues.apache.org/jira/browse/NIFI-15856
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Pierre Villard
> Assignee: Pierre Villard
> Priority: Major
>
> When {{JsonTreeReader}} feeds {{JsonRecordSetWriter}} (in my case with a
> {{{}ConvertRecord{}}}), the writer's configured {{{}Timestamp Format{}}},
> {{{}Date Format{}}}, {{{}Time Format{}}}, and {{Suppress Null Values}}
> properties are effectively ignored (the writer emits the reader's raw input
> bytes verbatim). This is an internal optimization: when the reader attaches
> the source JSON to the record, the writer detects a matching MIME type and
> short-circuits to the cached string instead of re-serializing from the typed
> values it already has.
>
> The consequence is that, for example, an input timestamp
> {{2025-03-20T17:33:11.000+0000}} passes through unchanged even when the
> writer is explicitly configured with {{yyyy-MM-dd'T'HH:mm:ss.SSSX}} (which
> would emit {{...Z}} for UTC)
>
> The existing optimisation is there for very specific use cases and it should
> be possible to turn it off if needed.
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