Hi Peihui, 这是一个已知bug[1]，已经在1.10.1和1.11.0中修复了，可以尝试下这两个版本。
[1] https://issues.apache.org/jira/browse/FLINK-16220 Peihui He <peihu...@gmail.com> 于2020年7月15日周三 上午9:54写道： > Hello， > > 在使用flink sql 1.10.0 时候，当source table 中含有复杂schema，比如 > create table xxx ( > a string, > b row( > c row(d string) > ) > ) > > 当c 中有值的时候，sql 如下 insert into select * from xxx会出现下面错误 > > Caused by: java.lang.ClassCastException: > > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.NullNode > cannot be cast to > > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.ObjectNode > at > > org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$assembleRowConverter$dd344700$1(JsonRowSerializationSchema.java:337) > at > > org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$wrapIntoNullableConverter$1fa09b5b$1(JsonRowSerializationSchema.java:189) > at > > org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$assembleRowConverter$dd344700$1(JsonRowSerializationSchema.java:345) > at > > org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$wrapIntoNullableConverter$1fa09b5b$1(JsonRowSerializationSchema.java:189) > at > > org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$assembleRowConverter$dd344700$1(JsonRowSerializationSchema.java:345) > at > > org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$wrapIntoNullableConverter$1fa09b5b$1(JsonRowSerializationSchema.java:189) > at > > org.apache.flink.formats.json.JsonRowSerializationSchema.serialize(JsonRowSerializationSchema.java:138) > ... 38 more > > > Best wishes. > -- Best, Benchao Li
