Callback functions and member data cache are removed from MdtCalibrationDbSvc using ReadCondHandle. For example derived data in "RtKey" was originally recorded by MdtCalibDbCoolStrTool reading raw data from "/MDT/RTBLOB". And the data was provided via detector store, removing previous IoV data. But in AthenaMT, derived data must be provided by an Alg via the condition store. So a new Alg with WriteCondhandle (MdtCalibDbAlg) is added to the condition sequence.
To schedule the derived data in the AthenaMT scheduler (--threads=1), the parent Svc and DbSvc are changed in to Tool and DbTool. And the private tools and condition handles are declared as properties either using auto-declaring initializer or declareProperty(). This should fix the read error found in a trigger test [!21313 (merged)] after merging the first MR [!21512 (merged)]. Since the same trigger test (test_mu_menu.sh) was not running in master (master,x86_64,centos7,gcc8,opt,2019-04-05T2141,Athena), I used another trigger test (test_mu_run_data.sh).
The trigger test, q221 and q431 output ESD was ok [diff-root-run09-q431.txtdiff-root-run09-mu_run_data.txtdiff-root-run09-q221.txt]. The tier0 test was also ok [RunTier0Tests.log]. Thanks a lot for feedback from @wleight @rosati @diehl @oda .