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weijk2533 avatar weijk2533 commented on June 26, 2024

hello, I meet this problem today. After one day test, I finally find that when using Ubuntu, you can not follow the STEP 1, just start form step 2.
Hope this will solve your problem too

In general, Just do not do the following three
X sudo apt-get install -y software-properties-common
X sudo apt-add-repository -y ppa:lttng/ppa
X sudo apt-get update

do not !

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Trass3r avatar Trass3r commented on June 26, 2024

That's cause the PPA will give you lttng 2.13+.
If you add --debug to the analyze commands you get to the actual error, pid got removed from lttng_statedump_file_descriptor, though it's unclear in which version: https://lwn.net/Articles/816142/, https://lttng.org/docs/v2.13/#doc-whats-new

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kienanstewart avatar kienanstewart commented on June 26, 2024

Adding the following command to the manual tracing steps before running lttng start can work-around this issue:

lttng add-context --kernel --type=pid

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