Agent Unknown Error

Hey team, any tips for finding the root cause of errors like this? Using ai-sdk v5, with agent streamVNext

message.txt

9 Replies

Ah after digging it was TPM rate limit error Would traces have shown this? I can't seem to get traces in my Postgres layer

_roamin_•3w ago

Hey @Chad Holmes ! It looks like we're not bubbling the error up properly. I'm not sure traces would have helped. Are you using the new AI tracing?

Chad HolmesOP•3w ago

I don't think so - I was only able to find it after configuring custom logging at the ai-sdk layer. I am on the latest version of mastra though, happy to try out new tracing if that could work!

_roamin_•3w ago

Got it! The new AI tracing is going to be our new observability solution (the current OTEL one will be deprecated at some point). You can find docs at https://mastra.ai/en/docs/observability/ai-tracing/overview One thing, you mentioned that you're using postgres, the adapater for postgres is going to be released today, so you might not be able to test it out until that is released. (unless you want to test it out with libsql)

AI Tracing | Observability | Mastra Docs

Set up AI tracing for Mastra applications

Chad HolmesOP•3w ago

Serendipitious timing! Thanks so much @Romain will be v excited to try it out today

Mastra Triager•3w ago

📝 Created GitHub issue: https://github.com/mastra-ai/mastra/issues/8349

GitHub

[DISCORD:1422621600590594088] Agent Unknown Error · Issue #8349 ·...

This issue was created from Discord post: https://discord.com/channels/1309558646228779139/1422621600590594088 Hey team, any tips for finding the root cause of errors like this? Using ai-sdk v5, wi...

LekoArts•3w ago

Can you try updating all mastra packages to their latest version?

Chad HolmesOP•3w ago

Hi team, I updated! And we were able to solve the error. However I am now trying to enable tracing and seeing the following error

ERROR [2025-10-02 14:29:47.166 -0600] (Mastra): [AI Tracing] Export error [exporter=tracing-default-exporter]
    err: {
      "type": "MastraError",
      "message": "AI tracing is not supported by this storage adapter (PostgresStore)",
      "stack":
          Error: AI tracing is not supported by this storage adapter (PostgresStore)
              at PostgresStore.get aiTracingStrategy [as aiTracingStrategy] (file:///Us

ERROR [2025-10-02 14:29:47.166 -0600] (Mastra): [AI Tracing] Export error [exporter=tracing-default-exporter]
    err: {
      "type": "MastraError",
      "message": "AI tracing is not supported by this storage adapter (PostgresStore)",
      "stack":
          Error: AI tracing is not supported by this storage adapter (PostgresStore)
              at PostgresStore.get aiTracingStrategy [as aiTracingStrategy] (file:///Us

Was postgres adaption for tracing not enabled by the most recent update? Wait now, I figured out how to get the upgrade to work, but I'm not seeing any traces get written

AI tracing exporter initialized {
  strategy: 'batch-with-updates',
  source: 'auto',
  storageAdapter: '',
  maxBatchSize: 1000,
  maxBatchWaitMs: 5000
}

AI tracing exporter initialized {
  strategy: 'batch-with-updates',
  source: 'auto',
  storageAdapter: '',
  maxBatchSize: 1000,
  maxBatchWaitMs: 5000
}

Seeing this without the storage adapter despite having success with messages and threads getting posted to postgres Okay all solved, didn't realize these are writing to a new table mastra_ai_spans

_roamin_•3w ago

Awesome, glad you figured it out! Let me know if you're running into other issues 😉

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Agent Unknown Error

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