Boot synchronization issue

1.    /usr/sap/<SID>/DV*/work/Log.bootstrap.0.log file shown the old port number after bootstrap sync.
caused by: com.sap.sql.log.OpenSQLException: Exception of type com.ibm.db2.jcc.am.DisconnectNonTransientConnectionException caught: [jcc][t4][2
043][11550][4.22.29] Exception java.net.ConnectException: Error opening socket to server cavdbxd2/10.221.27.15 on port 61,682 with message: err
no: 111 (Connection refused), error: Connection refused (local port 36060 to address 0.0.0.0, remote port 61682 to address 10.221.27.15 (cavdbx
d2.caveriongroup.com)). ERRORCODE=-4499, SQLSTATE=08001.)/db6/jdbc/jdbcdriver.lst
2.      Unable to login Configtool due to port issues

Solutions:

1.      Login to configtool using default parameter, change the system settings – VM parameter - > Port number from existing to new 5918 – Save it
2.      rsync -avrPtl  source to target or target to source
3.      bootstrap sync again with FORCE and after successful sync, change to DETECT
4.      start the DB2, ASCS, SCS and CI
5.      check the log file /usr/sap/<SID>/DV/work/dev_server0.log (good symptoms)
6.      check the jcmon pf=instance_profile