Cortex Data Lake - missing field in logs breaks parsing

[TitanAE2020]

I am currently using the Splunk TA for Palo Alto data.  And I'm ingesting data from Cortex Data Lake to a new Azure Syslog server.

But there is a large problem with the data we're ingesting.  The data being sent is literally missing a single field.  Below is a reference of what we should be ingesting:

Configuration Syslog Field Order (paloaltonetworks.com)

If you look at the example from this link, you will see this log:

Oct 13 20:56:15 gke-standard-cluster-2-pool-1-6ea9f13a-fnid 394 <142>1 2020-10-13T20:56:15.519Z stream-logfwd20-156653024-10121421-eq28-harness-16kn logforwarder - panwlogs - 1,​2020-10-13T20:56:03.000000Z,​007051000113358,​CONFIG,​config,​,​2020-10-13T20:56:00.000000Z,​xxx.xx.x.xx,​,​rename,​admin,​,​submitted,​/config/shared/log-settings/globalprotect/match-list/entry[@name='rs-globalprotect'],​150,​-9223372036854775808,​0,​0,​0,​0,​,​PA-VM,​,​,​,​2020-10-13T20:56:00.284000Z

But what I'm receiving is:

Oct 13 20:56:15 gke-standard-cluster-2-pool-1-6ea9f13a-fnid 394 <142>1 2020-10-13T20:56:15.519Z stream-logfwd20-156653024-10121421-eq28-harness-16kn logforwarder - panwlogs - ​2020-10-13T20:56:03.000000Z,​007051000113358,​CONFIG,​config,​,​2020-10-13T20:56:00.000000Z,​xxx.xx.x.xx,​,​rename,​admin,​,​submitted,​/config/shared/log-settings/globalprotect/match-list/entry[@name='rs-globalprotect'],​150,​-9223372036854775808,​0,​0,​0,​0,​,​PA-VM,​,​,​,​2020-10-13T20:56:00.284000Z

In the log I'm receiving, I'm missing a comma (,) before the 2020 in this line:

harness-16kn logforwarder - panwlogs - ​2020-10-13T20:56:03.000000Z

 

I should be receiving data that looks like this:

 

harness-16kn logforwarder - panwlogs - 1,​2020-10-13T20:56:03.000000Z

 

I'm at a loss where this data is generated.  If this is data generated by a syslog server, the unix server hosting syslog, or if it's on the Palo Alto Cortex Data Lake side of things. The logs are passed through our firewall and towards the syslog server.

 

I believe this field is either 'log_source_id' or 'log_type.value'.  But outside of that, I'm at a loss as to where this value is generated.  Any help is appreciated.

 

- TitanAE