Hello, all the masters here!   am facing the problem of acquiring installation lock when installing cloudera manager for the first time, i did some googling but nothing works for me 😞   i have four computers, etc/hosts like:   127.0.0.1 localhost.localdomain localhost 172.16.34.143 cluster2.test.com cluster2 172.16.34.140 cluster3.test.com cluster3 172.16.34.139 cluster4.test.com cluster4 172.16.34.141 cluster5.test.com cluster5   and etc/sysconfig/network is set accordingly, i managed to have a host installation done which is the cluster2 of ip 172.16.34.143.   and the rest three hosts are all stuck in Acquiring installation lock procedure, for like hours!   the detail output is like:     /tmp/scm_prepare_node.bulkkxpo using SSH_CLIENT to get the SCM hostname: 172.16.34.143 33121 22 opening logging file desciptor   Starting installation script...   Acquiring installation lock...   BEGIN flock 4   Can anyone help me with this problem? Help would be highly appreciated! Thanks in advance! ... View more