OID Connections Not Getting Closed or Connections Being Dropped by a Firewall or Load Balancer (Doc ID 293391.1)

Last updated on MARCH 07, 2023

Applies to:

Oracle Internet Directory - Version 9.0.4 and later
Information in this document applies to any platform.

Symptoms

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Oracle Internet Directory (OID) server refuses connections, in versions 9.0.4 and higher.

oidldapd01s.log shows a lot of errors like:

* ServerListener:2 * ERROR : ServerListener : Max numbers of connections reached. Num Conns = 900, Max Conns = 900, Closing the connection.

Or for version 11g and above logs show:

... ServerListener : Exceeding maximum number of connections allowed. Num Conns = 1024, Max Conns = 1024, Closing the connection.

Or:

... ServerDispatcher : sgslufread: Hard error on read, OS error = 110
...
... Main:: WARNING : ServerController : Processing shutdown notification
...

Or:

[2021-05-10T11:44:00.569967-04:00] [OID] [NOTIFICATION:16] [] [OIDLDAPD] [host: <hostname>] [pid: <pid>] [tid: <tid>] SSLthread: WARNING * gslsflnNegotiateSSL * Unusually high number of SSL connections queued; you may need to increase orclpluginworkers. Queued SSL connections = <number>

netstat -a | grep port <OID server port> | wc -l shows a steadily increasing number of connections (note that if the OID server and the clients are on the same system then the count will be double the number of client connections).

At the time of the problem ldapbinds may not do not respond.

For version 10.1.2.0.2 and above OID debug level 67108864, "Connection Statistics Dump" will show which application is opening connections in the OID logs.