Hi, I have configured ISPConfig 3 DNS only(primary and secondary mirror setup) with CentOS 7.3 From last six month it is working perfectly.But now it showing datalog_status_u_server: 6 in ISPconfig webpanel. So i enable debug mode on my secondary serever by following below mentioned thread, https://www.howtoforge.com/community/threads/please-read-before-posting.58408/ Attached is the htf_report.txt file. Below is the output of server.sh script 21.04.2017-20:26 - DEBUG - Found 2089 changes, starting update process. Its just showing this message from last one hour,nothing is happening. Kindly help me to resolve this issue because of this issue my new DNS records are not getting updated in my secondary server.