Know this is old but I am seeing the same issue. Just curious as to whether HADOOP_USER_CLASSPATH_FIRST solved the problem? Assume so due to the thumbsup on the comment but you mentioned mapreduce.job.user.classpath.first, is that setting picked up by TEZ jobs as well and not only MR? We're running version 0.7.0 of tez and afaik no similar flag exist there (in 0.9.0 there's tez.user.classpath.first). In our case we do not get this AbstractMethodError on every run so it seems that wrong class version is only picked sporadically. ... View more