Working with Oracle you already know that one day you will have to upload a tfa diagcollect log to Oracle Support.
As I always update TFA as soon as a new version comes out it was just a matter of running it. Right now the latest version is 18.4.2 and can be download here.
I did and wow … nothing happened. It hanged forever doing I do not know what.
Logs from the diagcollect were not helpful and neither strace.
I uploaded the files manually following MOS note: 2291539.1 and then filed another SR to support about the TFA issue.
A couple of days later and the analyst came with a workaround: set trimfiles=OFF
If you want to know more about TFA take a look at my OTN Brazil article here.