We’re currently using RoR v1.18.4 and ELK 6.8.2. We’ve noticed an issue where over time, the number of connections RoR is making to our LDAP server increases over time, eventually maxing out the number of LDAP connections allowed for the user. The only way to clear the connections seems to be to restart Elasticsearch. The number of connections does not increase linearly, but rather seems to increase in steps. It looks like this is happening when we edit the RoR config in Kibana and save - each save seems to generate a new set of LDAP connections, on top of the existing ones. The total connections exceeds the configured LDAP connection pool settings - see settings below.
We’ve also briefly tested this with v1.19.0 and it seems like the same behaviour exists.
Have you every seen any issue like this? Any ideas how to resolve or at least to investigate further?
- name: ldap1
search_user_base_DN: “OU=XXX Users,DC=XXX,DC=ie”