Andywli commented on issue #1499:
URL:
https://github.com/apache/incubator-linkis/issues/1499#issuecomment-1042773706
这个是因为Spark jars的json4s和lib/linkis-engineplugins/spark/dist/version/lib
包里面的json4s版本不一致，官方发布release时会在后面注明Spark的支持版本，如果不一致会存在该问题。
解决办法将Spark jars里面的json4s的包替换掉lib/linkis-engineplugins/spark/dist/version/lib
包里面的json4s版本。另外netty包也可能存在冲突，可按Json4s的方法进行处理.然后重启ecp服务即可：sh
sbin/linkis-damon.sh restart cg-engineplugin
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