log·jam 
/ˈlɑ:gˌʤæm/ noun
plural log·jams /ˈlɑ:gˌʤæm/ noun [count] 1 : a situation in which a large number of logs floating down a river become tangled with each other so that further movement is not possible 2 : a situation in which no progress seems possible
▪ He was called in to try to break the logjam in the negotiations.
▪ He was called in to try to break the logjam in the negotiations.
