Open Telemetry SPAN service attributes show up as Value not stored

[pvr]

Hello, 

I have a situation where Dev is setting some metadata via SPAN attributes ,  which show up on the distributed traces as "Value not stored".   The tool tip on hovering over this shows the following message :

"The attribute value is not configured to be stored. You can configure it in the traceview for future traces"

The How do I set this TraceView configuration ?   Can anybody help  ? 

thanks

Venkat

[Taylor-Sanchez · Accepted solution]

Hi @pvr ,

Are you specifying the span attributes in the allowlist as documented here by any chance? Only span attributes that are specified in the allowlist are will be stored. The following documentation outlines this process:
https://www.dynatrace.com/support/help/extend-dynatrace/extend-tracing/span-settings#span-attributes

[pvr]

thank you @Taylor-Sanchez