Similar to https://issues.apache.org/jira/browse/ACCUMULO-3532, 1.7.1 has added a TokenSource.JOB to the enum, which causes it to lose backward compatibility.
Commit that introduces the new value: https://github.com/apache/accumulo/commit/2c983317179634d6ddc10726defff303be4ae708#diff-abffdacb11d32dd39ae31b9795eecf4f90a6ee815d0af09d1faadd66f9cd091eR70 The TokenSource enum in accumulo/core/src/main/java/org/apache/accumulo/core/client/mapreduce/lib/impl/ConfiguratorBase.java before and after is: FILE, INLINE; FILE, INLINE, JOB; Best, Junwen
