Persistent search connection not released

Hi,
We are using DS6.1 and have set up two persistent search job using LDAP JDK4.1 to monitor some directory entry changes. During testing, we've found that client connections are not released on DS server when network problems caused the socket connection break. From the server, netstat shows tcp socket is still ESTABLISHED, since Psearch connections are not timed out by nsslapd-idletimeout, the only way to close those psearch connections are restarting server.
Is there any way we can close down these persistent search connections either by configuring DS parameters, or add implementation on programming level?
Anyone has experience using persistent search in production? Is it reliable?
Thanks,
Julia

Yes, our psearch connections are indeed closed when an entry change triggers the DS server to write to those connections.
Now we just have to make sure there will be entry change to trigger connection clean up before our DS reaches nsslapd-maxpsearch.
Thank you.

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Is the spelling correct? Is ithe app available in your country?

Any concern on persistent search through a load balancer?

We have access manager 7 installed which make use of persistent search. My understanding is that persistent search required to maintain a connection so that the server can refresh/update the client whenever entry in the result set changed. If we configure the system to connect to ldap through load balancer, will that cause any problem? What will happen if the load balancer refresh connection after a period of time? Or , if the original ldap server failed and the load balancer try load balance the client to another ldap server, will the persistent search still works?
Also, if the ldap server that the persistent search initially established connection with crashed, will the client get error message and in that case, is it the client's responsibility to re-run/retry the persistent search with other failover ldap server?
Thanks,

Your best bet, even when using a hardware load balancer, is to front your DS instances with a pair of load-balanced Directory Proxy Servers. This way, you have physical redundancy at the load balancer level, and intelligent LDAP-aware load balancing at the proxy server level. DPS 6 is very nice in that you can split binds, searches, and updates amongst several backend DS instances, and the connection state is maintained by the proxy, not the DS instance (i.e. if an instance fails, you really shouldn't be forced to rebind, the proxy fails-over to another DS for searching).
We have our Directory Servers on a pair of Solaris 10 systems, each with a zone for a replicated Master DS, and another zone each for a DPS instance. The DPS instances are configured to round-robin binds/searches/updates/etc. among the DS master zones. This works out very well for us.

Too many simultaneous persistent searches

The Access Manager (2005Q1) in our deployment talks to load-balanced Directory Server instances and as recommended by Sun we have set the value of the property com.sun.am.event.connection.idle.timeout to a value lower than load-balancer timeout.
However on enabling this property, we see the following error messages in the debug log file amEventService:
WARNING: EventService.processResponse() - Received a NULL Response. Attempting to re-start persistent searches
EventService.processResponse() - received DS message => [LDAPMessage] 85687 SearchResult {resultCode=51, errorMessage=too many simultaneous persistent searches}
netscape.ldap.LDAPException: Error result (51); too many simultaneous persistent searches; LDAP server is busy
Any idea - why this occurs?
Do we need to modify the value associated with the attribute nsslapd-maxpsearch ?
How many Persistent searches does Access Manager fire on the Directory Server ? Can this be controlled ?
TIA,
Chetan

I am having an issue where the Access Manager does not seem to fire any persistent searches at all to the DS.
We have disabled properties which try to disable certain types of persistent searches and hence in reality there should be lots of persistent searches being fired to the DS.
Also, there does seem to be some communication between the DS and the Access Manager instance. ....as the AM instance we work on talks only to a particular DS instance. But they do not seem to find any persistent searches being fired from our side at all....the only time they did see some persistent searches was when I did a persistent search from the command line.
What could be the issue??
thanks
anand

Persistent search connection not released

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