Re: tests/regression/tools/clear/test_ust fails occacionally

The more detail around the error as below.


[warning] [Context] Cannot open_trace of format lttng-live at path 
net://localhost/host/qemux86-64/ggpndHBBanTXM3EY.
[warning] [Context] cannot open trace 
"net://localhost/host/qemux86-64/ggpndHBBanTXM3EY" for reading.
[error] opening trace "net://localhost/host/qemux86-64/ggpndHBBanTXM3EY" 
for reading.

[error] none of the specified trace paths could be opened.

# Wait for viewer to exit
not ok 486 - Babeltrace succeeds
FAIL: tools/clear/test_ust 486 - Babeltrace succeeds
#   Failed test 'Babeltrace succeeds'
#   in ./tools/clear/test_ust:test_ust_streaming_live_viewer() at line 324.


Thanks,
Mingli

On 7/14/25 17:37, Yu, Mingli via lttng-dev wrote:
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> 
> Hi,
> 
> The lttng-tools test fails as below, is there anyone meet the same issue
> and how to fix this?  Thanks!
> 
> 
> FAIL: tools/clear/test_ust 486 - Babeltrace succeeds
> [snip]
> FAIL: tools/clear/test_ust 706 - Babeltrace succeeds
> [snip]
> FAIL: tools/clear/test_ust
> [snip]
> # Wait for viewer to exit
> not ok 486 - Babeltrace succeeds
> FAIL: tools/clear/test_ust 486 - Babeltrace succeeds
> #   Failed test 'Babeltrace succeeds'
> #   in ./tools/clear/test_ust:test_ust_streaming_live_viewer() at line 324.
> [snip]
> # Wait for viewer to exit
> not ok 706 - Babeltrace succeeds
> FAIL: tools/clear/test_ust 706 - Babeltrace succeeds
> #   Failed test 'Babeltrace succeeds'
> #   in ./tools/clear/test_ust:test_ust_streaming_live_viewer() at line 324.
> 
> 
> Thanks,
> Mingli