JoltTransformRecord 2025.10.9.21¶
Bundle¶
org.apache.nifi | nifi-jolt-nar
Description¶
Applies a JOLT specification to each record in the FlowFile payload. A new FlowFile is created with transformed content and is routed to the ‘success’ relationship. If the transform fails, the original FlowFile is routed to the ‘failure’ relationship.
Tags¶
cardinality, chainr, defaultr, jolt, record, removr, shiftr, sort, transform
Input Requirement¶
REQUIRED
Supports Sensitive Dynamic Properties¶
false
Properties¶
| Property | Description |
|---|---|
| Custom Module Directory | Comma-separated list of paths to files and/or directories which contain modules containing custom transformations (that are not included on NiFi’s classpath). |
| Custom Transformation Class Name | Fully Qualified Class Name for Custom Transformation |
| Jolt Specification | Jolt Specification for transformation of JSON data. The value for this property may be the text of a Jolt specification or the path to a file containing a Jolt specification. ‘Jolt Specification’ must be set, or the value is ignored if the Jolt Sort Transformation is selected. |
| Jolt Transform | Specifies the Jolt Transformation that should be used with the provided specification. |
| Transform Cache Size | Compiling a Jolt Transform can be fairly expensive. Ideally, this will be done only once. However, if the Expression Language is used in the transform, we may need a new Transform for each FlowFile. This value controls how many of those Transforms we cache in memory in order to avoid having to compile the Transform each time. |
| jolt-record-record-reader | Specifies the Controller Service to use for parsing incoming data and determining the data’s schema. |
| jolt-record-record-writer | Specifies the Controller Service to use for writing out the records |
Relationships¶
| Name | Description |
|---|---|
| failure | If a FlowFile fails processing for any reason (for example, the FlowFile records cannot be parsed), it will be routed to this relationship |
| original | The original FlowFile that was transformed. If the FlowFile fails processing, nothing will be sent to this relationship |
| success | The FlowFile with transformed content will be routed to this relationship |
Writes attributes¶
| Name | Description |
|---|---|
| record.count | The number of records in an outgoing FlowFile |
| mime.type | The MIME Type that the configured Record Writer indicates is appropriate |