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HBase >> mail # user >> Unknown process in listing of "jps" command

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Unknown process in listing of "jps" command
I have configured Hadoop and Hbase successfully ( i think so ) . I tried
creating some tables and it works fine. When i issue jps command to list
java processes , i see following :-

hadoop@Rupesh:~/HadoopBase$ jps
*16276 Main
13594 NameNode
14033 SecondaryNameNode
15643 HQuorumPeer
13812 DataNode
15704 HMaster
16606 Jps
15953 HRegionServer

My question is what are the *Main and HQuorumPeer* process ? Rest i
Please help.

Thanks and Regards,
Vimal Jain