BTrace probe's output is not being redirected for the first connection.

[ksiczek]

I have a rather simple btrace script and I connect to JBoss 7 JVM 8 on Fedora 34. I would like to redirect the output to a file using -o switch but it does not seem to work for the first time I connect to JVM (probes are printed to the standard output) and I have to do Ctrl+C and connect again - then it works. Is this something you guys know about? Is the -o reliable and is there any difference than standard redirect >?

The other thing I noticed is that if I use -o and exit the btrace then connect again without -o it still redirects to the file. I might not comprehend how btrace works in terms of restarting/reconnecting but having the -o working for the very first time is important to me.

[jbachorik]

Hi @ksiczek, thanks for reporting this.
I will try looking into this in the near future.

[jbachorik]

Just to let you know this is not forgotten - it's just that I have not that much free time left nowadays so it might take a while till I get to this :(