No symbols in Node.JS application about parca HOT 15 OPEN

Providing more details on my previous comment:

Application versions

Nodejs: 20.11.1
Parca agent: v0.28
Parca server: v0.21

We are running nodejs in a container based on node-20:alpine, and using dumb-init. I followed the troubleshooting docs and the process is correctly creating the perfmap.

After enabling --perf-basic-prof-only-functions and --interpreted-frames-native-stack I have JIT symbols but no Node runtime symbols

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Could this be related to #2810?

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Maybe. Any progress with it?

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With version 0.19.0 I don't get these errors, but still there are no symbols.

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Anything I can provide to help debugging this?

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@orgads Sorry for not getting back to you sooner. Could you check this document for troubleshooting: https://www.polarsignals.com/docs/nodejs#troubleshooting

We recently discovered some issues regarding some nodejs bugs.

Let us know if it doesn't help.

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I'm really not sure what I did different, but it works now. Thanks!

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For what it's worth we've done many improvements in this area recently, so maybe it was just fixed with that.

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I use the same versions 😅

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Ah ok, that's odd then. But glad it works now!

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Ok, I found out what my problem was. My application is running in Docker, so it writes the perfmap file in /tmp inside the container. I need to map it to the host for perf/parca to work correctly.

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This should not be a problem, we should be reading the tmp of any process in a different mount namespace... @kakkoyun for your attention

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Actually I did my current tests with plain perf, so maybe parca did work without it.

Is there a flag for perf that enables reading it from the container?

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I'm currently having the same issue with Parca running in K8s, no error logs though. NodeJS is generating the perfmap file in the /tmp directory of the container, Parca agent is running in the host, the whole thing deployed with the Parca Helm chart. Parca only shows addresses and no symbols though.

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We need to double-check the symbolization https://discord.com/channels/877547706334199818/877547706334199821/1217440802322776094

I'm re-opening the issue to keep track of things.

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