Client obtains the error 51 when sending amount of BINDS to an Active Directory.
Error 51: Busy
00002024: LdapErr: DSID-0C060598, comment: No other operations may be performed on the connection while a bind is outstanding., data 0, v1db1
In fact, this is a limitation of the Active Directory. But, if we have few connections configured in the pool of BINDS (by default is set to 2) of the servergroup, it’s possible that the directory don’t have enough time to process them, generating the error.
Within the GUI: Output->ServerGroup->Connection Pooling
Increase the value of the ‘Bind Pool Connections’ parameter, for example to 10.