When creating a Trace Recording in the Control Center it is mandatory to add at least one filter. This can be either a filter for the client identifier or a topic filter.
These filters are interpreted as regular expressions
What this means is that filters added here will not be interpreted as literal strings and should they include special characters can have different results than might have been expected.
Special characters in this sense include:
. , + , * , ? , ^ , $ , ( , ) , [ , ] , { , } , | , \
For example, if you want to include into a Trace Recording all possible Client Id-s, use Regular Expression .*, where:
. matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible