During the upgrade, the following messages appear in in $MDS_TEMPLATE/log/cpm.elg:
DATE TIME,PID INFO upgrade.common.GenerateUpgradeReportTimerTask [Timer-0]: UpgradeStats: there are 2 reports in $MDS_FWDIR/log
DATE TIME,PID INFO upgrade.common.GenerateUpgradeReportTimerTask [Timer-0]: UpgradeStats: delete /opt/CPsuite-R80.40/fw1/log/upgrade_report-2020.09.12_19.57.24.html DATE TIME,PID INFO upgrade.ngmImport.MultiSiteNewUpgradeSvcImpl [taskExecutor-48]: Waiting for FullSync 1430 seconds
DATE TIME,PID INFO cpm.commands.Server [main]: <<== Memory Report: Total Memory - 1306 MB; Used - 977 MB, Free - 328 MB, Heap - 977 MB, Non Heap - 207 MB, Percent Used - 74 %==>>
DATE TIME,PID6 INFO cpm.commands.Server [main]: <<== Threads Report: number of threads - 198 ==>> DATE TIME,PID INFO upgrade.ngmImport.MultiSiteNewUpgradeSvcImpl [taskExecutor-48]: Waiting for FullSync 1440 seconds DATE TIME,PID INFO upgrade.ngmImport.MultiSiteNewUpgradeSvcImpl [taskExecutor-48]: Waiting for FullSync 1450 seconds
DATE TIME,PID INFO upgrade.common.GenerateUpgradeReportTimerTask [Timer-0]: UpgradeStats: generating report: /opt/CPsuite-R80.40/fw1/log/upgrade_report-2020.09.12_19.58.24.html
DATE TIME,PID INFO upgrade.common.GenerateUpgradeReportTimerTask [Timer-0]: UpgradeStats: Upgrade Report is now available at /opt/CPsuite-R80.40/fw1/log/upgrade_report-2020.09.12_19.58.24.html
Jumbo Hotfix was installed on the primary MDS server after it was successfully upgraded.
Cause
Full sync does not complete after the first reboot (operating system upgraded) due to different hotfixes installed on the primary Multi-Domain Management server.