Java APM agent sends no timeline spans

[albert1625 (Albert)]

@felixbarny

Is that the first SQL statement ( select persondb0_.id as id1_0_, persondb0_.age as age2_0_, persondb0_.first_name as first_na3_0_, persondb0_.last_name as last_nam4_0_ from person persondb0_ )?

Yes, that's first transaction which appears in spans.

@felixbarny

Do you expect the other two SQL statements

2018-07-24 10:27:09,966 DEBUG [org.hibernate.SQL] (hystrix-MainApiController-1) select persondb0_.id as id1_0_, persondb0_.age as age2_0_, persondb0_.first_name as first_na3_0_, persondb0_.last_name as last_nam4_0_ from person persondb0_ where persondb0_.id=?
2018-07-24 10:27:09,976 DEBUG [org.hibernate.SQL] (hystrix-MainApiController-1) select persondb0_.id as id1_0_, persondb0_.age as age2_0_, persondb0_.first_name as first_na3_0_, persondb0_.last_name as last_nam4_0_ from person persondb0_ where persondb0_.id=?

to be part of the other span?

That's exactly what I expected.

What I discovered is that the reason of missing spans is Hystrix (fault tolerance library) and looks like it works asynchronously. I switched it on for some functions and spans was missing exactly for these functions. As soon as I disabled it everything started working as expected.