Steps to reproduce

1. In Crowd 2.8.4, navigate to Cogwheel Menu > LDAP connection pool
2. Modify the values in each of the the connection pool settings
3. Restart Crowd
4. Go back to the same page

Expected results

The "LDAP connection pool statistics" report at the top will reflect the connection pool settings previous inputted

Actual results

The "LDAP connection pool statistics" report shows the same starting values each time:

***** start *****
idle timeout: 0
maximum pool size: 0
preferred pool size: 0
initial pool size: 1
protocol types: plain ssl
authentication types: none simple 
...

Other notes

In earlier versions of Crowd, such as 2.8.0, the "LDAP connection pool statistics" report is not available from the UI. However, one can still validate that Crowd is still affected by this issue by setting the following JVM startup parameter:

-Dcom.sun.jndi.ldap.connect.pool.debug=all

The same LDAP connection report can be seen at the very beginning of Crowd startup in Tomcat logs, at <crowd_install>/apache-tomcat/logs/catalina.out

Workaround

Setting the parameters directly via JVM parameters still works:

com.sun.jndi.ldap.connect.pool.authentication
com.sun.jndi.ldap.connect.pool.debug
com.sun.jndi.ldap.connect.pool.initsize
com.sun.jndi.ldap.connect.pool.maxsize
com.sun.jndi.ldap.connect.pool.prefsize
com.sun.jndi.ldap.connect.pool.protocol
com.sun.jndi.ldap.connect.pool.timeout

Reference: http://docs.oracle.com/javase/jndi/tutorial/ldap/connect/config.html