On 2/3/2017 12:17 πμ, Quanah Gibson-Mount wrote: Thank you Quanah, I just added (to syncrepl config): keepalive=20:100:2 Any suggestions on the selected values? What are the default ones? (I haven't found them in docs.) I will monitor the situation and I'll let you know of the outcome. Has such an issue been reported by others in recent versions? Why didn't I have this problem with all versions until 2.4.39 (on CentOS 5)? Some notes follow: Interestingly, in the documentation: http://www.openldap.org/doc/admin24/replication.html http://www.openldap.org/doc/admin24/slapdconfig.html#Configuration%20File... ...I don't see any reference to the keepalive parameter. However, "man slapd.conf" states: The keepalive parameter sets the values of idle, probes, and interval used to check whether a socket is alive; idle is the number of seconds a connection needs to remain idle before TCP starts sending keepalive probes; probes is the maximum number of keepalive probes TCP should send before dropping the connection; interval is interval in seconds between individual keepalive probes. Only some systems support the customization of these values; the keepalive parameter is ignored otherwise, and system-wide settings are used. Since "only some systems support the customization of these values; the keepalive parameter is ignored otherwise", how can I make sure that this parameter has been configured successfully and is enabled on my system (CentOS 7)? I enabled "loglevel config stats sync"but I don't see any mention of configured syncrepl parameters during OpenLDAP start. Please advise. Thanks, Nick