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We recently had to switch to LDAPS from LDAP. Using LDAP we would see less than 10 connections to the LDAP server. We applied the settings from KB article...
We are still seeing connections shoot up to over 5000 connections to the ldap server and users can no longer login to the applications.
On the Connector tab we have tried the following combinations.
None seem to help. As soon as we switch back to ldap everything works fine...
The reported problem might be related to this bug that got fixed on Crowd 2.8.2: https://jira.atlassian.com/browse/CWD-4070
I'd recommend you to set up a staging environment in which you could upgrade Crowd to 2.8.2 and verify whether the problem is replicable there.
I hope it helps!
Did you check the LDAP connection pool settings?
You might also want to set your own values in setenv.sh:
-Dcom.sun.jndi.ldap.connect.pool.protocol='plain ssl' -Dcom.sun.jndi.ldap.connect.pool.authentication='none simple DIGEST-MD5' -Dcom.sun.jndi.ldap.connect.pool.maxsize = <your_value> -Dcom.sun.jndi.ldap.connect.pool.prefsize = <your_value> -Dcom.sun.jndi.ldap.connect.timeout = <your_value>