Github user wangmiao1981 commented on the issue:
https://github.com/apache/spark/pull/15421
I trace back to `createDataFrame.default`
...
jrdd <- getJRDD(lapply(rdd, function(x) x), "row")
srdd <- callJMethod(jrdd, "rdd")
sdf <- callJStatic("org.apache.spark.sql.api.r.SQLUtils", "createDF",
srdd, schema$jobj, sparkSession)
dataFrame(sdf)
The `srdd` object should be the one used in `createDF`, which caused `def
readString(in: DataInputStream): String ` negative index issue.
I checked `data` in `createDataFrame.default`, which is correct on R side.
I get lost in the serialization part.
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