请教group windows的order by问题

Start with the supplied SQL query and the reported StreamExecSort.scala exception, then trace the planner path through StreamExecSort.scala and TableEnvironmentImpl.java. Reproduce the grouped one-second window with the example Kafka input and determine whether ORDER BY ROWTIME is supported in this query shape. Done means the supported syntax or limitation is established and clearly communicated.

需要根据1秒的window中的ROWTIME进行排序，但是报如下错误：
Exception in thread "main" org.apache.flink.table.api.TableException: Sort on a non-time-attribute field is not supported.
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecSort.translateToPlanInternal(StreamExecSort.scala:118)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecSort.translateToPlanInternal(StreamExecSort.scala:59)
at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:58)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecSort.translateToPlan(StreamExecSort.scala:59)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecSink.translateToTransformation(StreamExecSink.scala:184)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecSink.translateToPlanInternal(StreamExecSink.scala:91)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecSink.translateToPlanInternal(StreamExecSink.scala:48)
at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:58)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecSink.translateToPlan(StreamExecSink.scala:48)
at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:60)
at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:59)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.AbstractTraversable.map(Traversable.scala:104)
at org.apache.flink.table.planner.delegation.StreamPlanner.translateToPlan(StreamPlanner.scala:59)
at org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:153)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.translate(TableEnvironmentImpl.java:682)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.insertIntoInternal(TableEnvironmentImpl.java:355)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.insertInto(TableEnvironmentImpl.java:334)
at com.dtstack.flink.sql.exec.FlinkSQLExec.sqlUpdate(FlinkSQLExec.java:94)
at com.dtstack.flink.sql.exec.ExecuteProcessHelper.sqlTranslation(ExecuteProcessHelper.java:235)
at com.dtstack.flink.sql.exec.ExecuteProcessHelper.getStreamExecution(ExecuteProcessHelper.java:169)
at com.dtstack.flink.sql.Main.main(Main.java:41)
at com.dtstack.flink.sql.launcher.LauncherMain.main(LauncherMain.java:140)

我的脚本如下：
CREATE TABLE MyTable(
name varchar,
after varchar,
jstime bigint,
WATERMARK FOR jstime AS withOffset(jstime,1000)
)WITH(
type ='kafka10',
bootstrapServers ='pro1:9092',
kafka.auto.offset.reset ='latest',
topic ='test1',
parallelism ='1',
sourcedatatype ='json'
);
CREATE TABLE result_user_info(
name varchar,
after varchar,
jstime bigint,
ROWTIME datetime
)WITH(
type ='console',
parallelism ='1'
);
insert into result_user_info(name,after,jstime,ROWTIME) (select name ,
after ,
jstime,ROWTIME from MyTable
group by name,after,jstime,TUMBLE(ROWTIME, INTERVAL '1' SECOND),ROWTIME order by ROWTIME)

kafka消息：
{"name":"testname","jstime":3119988231,"after":"{"khh":"我是khh0003"}"}
想请教是否是语法写错了，还是有别的排序方法，多谢