Getting Data In

Why are events ingested using the journald modular input truncated at 4088 bytes?

chris_barrett
SplunkTrust
SplunkTrust

I'm pulling in events from the journal of a number of Linux hosts using the journald modular input.

I'm seeing truncated events every so often and, when I look at the length of _raw, I see that it's always 4088 bytes.

The man page for journalctl (https://www.freedesktop.org/software/systemd/man/journalctl.html) says that when events are outputted using JSON format, that "Fields larger than 4096 bytes are encoded as null values. (This may be turned off by passing --all, but be aware that this may allocate overly long JSON objects.)"

I'm presuming that that's what happening with the truncated events that I'm seeing.   Is anyone aware of a way around this?  I can't see any configuration setting associated with the journald modular input that would let me enable the '--all' flag.

FWIW, I'm running Splunk Enterprise 9.0.2

Labels (1)
Tags (2)
0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

ATTENTION: We’re Moving! (AGAIN!)

The Splunk Community Slack is undergoing a system migration to keep our workspace secure and ...

Deep Dive: Optimizing Telemetry Pipelines in Splunk Observability Cloud

In this session, we will peel back the layers of Splunk Observability Cloud’s cost-optimization features. ...

Announcing Modern Navigation: A New Era of Splunk User Experience

We are excited to introduce the Modern Navigation feature in the Splunk Platform, available to both cloud and ...