Yes Linkedin , twitter already moved to scala 1 year back(Not all the module. Only there messaging modules) because of the direct support from Martin Odersky (The one who create scala).We did lot of projects with scala (1 year back) but we faced lot of issues with some great concurrency and those are listed in scala JIRA dashboard. They suggest us to use Akka but still Akka is not that mature enough to handle Locking mechanisms. So that's what I said for a large projects still its a better to use Java but if you a building a smaller module yes scala is the best. Try to use clojure and you will see the difference.
Parallel programming in scala is beautiful. The reason I guess they recommended you akka is it gives easier programming without complexities for developers who are not exposed to concurrent programming. We are running a rest based service backend with akka majority of modules ported to scala. Not a single multithreading issue did I encountered. Basically scala compiles to the bytecode and run in the same old jvm. So anything can be done in java, can be achieved in scala. You can even mix java and scala as a last resort too. So I seriously doubt the issues you faced was something to do with the language itself.
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, Final year project eka valuable ekk karapan, Languages thaniyama igena ganin. (Uba poddak nerd wena eke waradak naa 
mama ekalkiri ekata aluth meka godak watina site ekak, adminta bohoma sthuthi. mata danaganna ona deyak thiyenawa.
