Hello,

We are testing openldap-2.3.38 with db-4.5.20. Our tests are oriented to measure capacity and stability of LDAP daemon.

3 clients machines perform search queries against the ldap server. We have used two types of clients: library NET::LDAP in perl, and C LDAP library directly. The problem is reproduced whit both types of clients

We are observed that the ldap server crash after 24-48 hours after working with high load (1000-2000 searches/second). In log file there is the following message:

connection_read(24): no connection! connection_read(18): no connection! connection_read(20): no connection! connection_read(19): no connection! connection_read(23): no connection! connection_read(18): no connection! connection_read(16): no connection! connection_read(22): no connection! connection_read(19): no connection!

Using TCPDump we have observed that clients do not finish the search witch an unbind operation. Simply TCP connection is closed by a FIN packet. We suppose that this is the cause than produces the message in the LDAP log.

The main issue is than after 24-48 hours the LDAP daemon dies. We have also tested openldap-2.3.30.

Our configures are:

Berkeley DB config.status 4.5.20 configured by ../dist/configure, generated by GNU Autoconf 2.60, with options "'--prefix=/opt/lib/db-4.5.20' '--enable-compat185' '--enable-cxx'"

configured by ./configure, generated by GNU Autoconf 2.59, with options "'--prefix=/opt/openldap-2.3.38' '--exec-prefix=/opt/openldap-2.3.38' '--disable-syslog' '--disable-ipv6' '--enable-slapd' '--enable-crypt' '--enable-bdb' '--enable-syncprov' '--with-threads' '--with-tls' 'CPPFLAGS=-I/opt/lib/db/include -I/opt/lib/openssl/include' 'LDFLAGS=-L/opt/lib/db/lib -L/opt/lib/openssl/lib

The machine is a linux Redhat Enterprise 4.5.