ell, the problem that kept cropping up last year seems to have been finally fixed.
Not to get too technical, but starting the Payara Microprofile server causes it to create a Root Configuration Directory in the /tmp filespace.
Apparently, this same filespace tends to get cleaned up somehow (?) periodically in Jelastic, causing some of the html files to suddenly go missing.
Adding the command line parameter "--rootDir ../payaramicro-rt" forcing it to use a certain directory fixed the problem.
See for more information here.
High Regards,By Karn.