sparklyr doesn't work with sparkxgb

[ciasom]

After loading sparkxgb (0.1.0), sparklyr (v1.0.1) can't connect to spark (via livy). It failed in the following piece of code in function spark_connect:

if (length(scon$extensions) > 0) { for (initializer in scon$extensions$initializers) { if (is.function(initializer)) initializer(scon) } }

where Browse[4]> scon$extensions [1] "sparkxgb" Browse[4]> class(scon$extensions) [1] "character"

So scon$extensions$initializers throws exception of "$ operator is invalid for atomic vectors".

[tschutte]

The same issue occurs when loading the "sparklyr.nested" package prior to connecting to spark.