Splunk® Data Stream Processor

Function Reference

On April 3, 2023, Splunk Data Stream Processor reached its end of sale, and will reach its end of life on February 28, 2025. If you are an existing DSP customer, please reach out to your account team for more information.

All DSP releases prior to DSP 1.4.0 use Gravity, a Kubernetes orchestrator, which has been announced end-of-life. We have replaced Gravity with an alternative component in DSP 1.4.0. Therefore, we will no longer provide support for versions of DSP prior to DSP 1.4.0 after July 1, 2023. We advise all of our customers to upgrade to DSP 1.4.0 in order to continue to receive full product support from Splunk.

Merge Events

This topic describes how to use the function in the .

This function has been deprecated. Use the new Apply Line Break function instead.


Parses data received from a universal forwarder into a stream of complete events for a Splunk Index. The universal forwarder does not parse incoming data, so you must use this function if you are using a universal forwarder. You must use merge_events in conjunction with key_by.

Function Input/Output Schema

Function Input
GroupedStream<record<K>, record<V>>
This function accepts records with schema V, grouped on schema K.
Function Output
This function outputs a collection of records with a schema R.


The required fields are in bold font.


Required arguments

Syntax: expression<string>
Description: An expression to get the desired field to be broken into single events.
Example in Canvas View: cast(body, "string")
Syntax: <regular-expression>
Description: The Java regular expression used to break events.
Example in Canvas View: /(\n)[0-9]{2}-[0-9]{2}-[0-9]{4}/

Optional arguments

Syntax: string
Description: The name of the output field in the new event.
Default: body
Example in Canvas View: body
Syntax: long
Description: Specifies the maximum event size, in bytes, of an event. Size cannot exceed 1MB.
Default: 1000000 (1MB)
Example in Canvas View: 1000000

SPL2 examples

The following example assumes that you are in the SPL View. When working in the SPL View, you can write the function by providing the arguments in the exact order shown below.

Break a single event in body using a newline delimiter, and output multiple events in newfield.

...| merge_events content=cast(body, "string"), delimiter=/\n/, output=newfield, max_event_size=1000000 |...
Last modified on 08 February, 2022
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This documentation applies to the following versions of Splunk® Data Stream Processor: 1.2.0, 1.2.1-patch02, 1.2.1, 1.2.2-patch02, 1.2.4, 1.2.5, 1.3.0, 1.3.1, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.4.4

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