[lttng-dev] UST Create Channel Failed, Why?

Dilong Zheng Dilong.Zheng at mitel.com
Mon Jul 6 14:11:23 EDT 2015

Hi all,

While trying to enable UST events, I get the following error message:

Error: Event mitel:sem_wait_entry: UST create channel failed (channel channel0, session mcdUST3)

When I type: lttng list -u I am able to see a list of all my UST tracepoints.

Could someone please provide some insight as to why this error is appearing and steps I could take to fix this error. Thanks.

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