@Jade Liu you need to add the server to firewall policy. You can allow all traffic to that server in firewall policy or go through each Port and add them.
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please accept the best answer and I recommend you take your steps and create an article instead of question on this site, it will be helpful for everyone and you will earn reputation! @Shigeru Takehara
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@Sourygna Luangsay and it still says sc.version 1.4.1? can you go into admin page on ambari and doublecheck that you completed the upgrade?
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@Jade Liu can you run tracert to spark01 server, if its an option also disable firewall and try again. It's hard to tell but you may be denying that server.
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