Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/sql/SparkSession$ at org.apache.spark.examples.GroupByTest.main(GroupByTest.scala)
Caused b
现在我无法启动apache2,当我在终端上输入'sudo service apache2 start‘命令时,它会给出这个错误。apache2.service - The Apache HTTP Server
Loaded: loaded (/lib/systemd/system/apache2.service; enabledAug 24 23:37:56 user-E5-575G apachectl[14755]: The Apache<