The purpose of this article is to provide the details on the approach used to add 3rd node in the live environment and workarounds used to deal with unknown bugs. Node 1 cd /data01/home/oracle/stage/clusterware/clusterware/cluvfy ./runcluvfy.sh stage -pre crsinst -n el1,el2,el3 Node 1 set display , start exceed Node 1 sudo su - oracle cd $ORA_CRS_HOME/oui/bin ./addNode.sh ( OUI will start) as oracle user enter new node information monitor oui run rootaddnode.sh Node 3 run root.sh Be careful here…CRS may not come up. Happened in 64 bit root.sh failed with the following error: Startup will be queued to init within 90 seconds. Adding daemons to inittab Expecting the CRS daemons to be up within 600 seconds. Failure at final check of Oracle CRS stack. 10 crsd.log: 2007-09-06 04:20:42.701: [ CSSCLNT][3086964416]clsssInitNative: connect failed, rc 9 2007-09-06 04:20:42.702: [ CRSRTI][3086964416]0CSS is not ready. Received status 3 from CSS. Waiting for good status .. 2007-09-06 04:20:43.737: [ COMMCRS][120400816]clsc_connect: (0x8622de0) no listener at (ADDRESS=(PROTO =ipc)(KEY=OCSSD_LL_el2_crs)) 2007-09-06 04:20:43.737: [ CSSCLNT][3086964416]clsssInitNative: connect failed, rc 9 2007-09-06 04:20:43.738: [ CRSRTI][3086964416]0CSS is not ready. Received status 3 from CSS. Waiting for good status .. 2007-09-06 04:20:44.774: [ COMMCRS][120400816]clsc_connect: (0x8622de0) no listener at (ADDRESS=(PROTOCOL=ipc)(KEY=OCSSD_LL_el2_crs)) 2007-09-06 04:20:44.774: [ CSSCLNT][3086964416]clsssInitNative: connect failed, rc 9 2007-09-06 04:20:44.775: [ CRSRTI][3086964416]0CSS is not ready. Received status 3 from CSS. Waiting for good status.. Workarounds: a. ps -ef | grep -i d.bin and kill the process b. /etc/init.d/init.crs stop c. rm -rf /tmp/.oracle d. rm -rf /var/tmp/.oracle e. rm -rf /etc/oracle f. 3rd node chown root:oinstall log cdata g. run root.sh It worked without any issues. Node 3 run ./vipca Node 1 oracle user: cat $ORA_CRS_HOME/opmn/conf/ons.config and check for remote port cd $ORA_CRS_HOME/bin ./racgons add_config node3:remote port Oracle Home installation oracle user Node 1 cd $ORACLE_HOME/oui/bin ./addNode.sh In case you receive the following message then run oui in silent mode. oui:10009 --> There are no new nodes to add OUI will show the new node ./addNode.sh -silent "CLUSTER_NEW_NODES={el3}" -logLevel trace -debug |