don't panic if worker exits normally
don't panic if worker exits normally

shuoyangd/nematus,rsennrich/nematus,EdinburghNLP/nematus,Proyag/nematus,rsennrich/nematus,Proyag/nematus,cshanbo/nematus,cshanbo/nematus,Proyag/nematus,Proyag/nematus,cshanbo/nematus,rsennrich/nematus,rsennrich/nematus,Proyag/nematus,EdinburghNLP/nematus,EdinburghNLP/nematus,shuoyangd/nematus,cshanbo/nematus,rsennrich/nematus,EdinburghNLP/nematus,EdinburghNLP/nematus,cshanbo/nematus,shuoyangd/nematus,shuoyangd/nematus,shuoyangd/nematus,shuoyangd/nematus,rsennrich/nematus,Proyag/nematus,EdinburghNLP/nematus,cshanbo/nematus