There may be several reasons behind this. First, check the firewall. If it is fine then, there may be a problem with the log file. You may delete the previous log file. Or check the log file properly. It should show the error message.
You have upgraded your HDP. But your other tools remain the same. The thing is we should check which one is compatible with which one be upgrading. Do one thing shut down your zookeeper and create a new one and try to connect again.
You can use tcpdump command to troubleshoot. I mean run the tcpdump command to that node and capture the network packet. And see what it is showing.
To start ZooKeeper you have to execute ZooKeeperServerMain class.
You can use ...READ MORE
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org.apache.hadoop.mapred is the Old API
org.apache.hadoop.mapreduce is the ...READ MORE
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This error occurs if the hbase server ...READ MORE
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