High load during backup operation using db2ldif command in Red Hat Directory Server.

Issue

• High load during backup operation using db2ldif command in Red Hat Directory Server (RHDS).
• Issue is observed after certificates were upgraded in the Red Hat Directory Server.

[04/Dec/2014:08:29:28 +0100] attrcrypt - attrcrypt_unwrap_key: failed to unwrap key for cipher AES
[04/Dec/2014:08:29:28 +0100] attrcrypt - attrcrypt_cipher_init: symmetric key failed to unwrap with the private key; Cert might have been renewed since the key is wrapped.  To recover the encrypted contents, keep the wrapped symmetric key value.
[04/Dec/2014:08:29:28 +0100] attrcrypt - attrcrypt_unwrap_key: failed to unwrap key for cipher 3DES
[04/Dec/2014:08:29:28 +0100] attrcrypt - attrcrypt_cipher_init: symmetric key failed to unwrap with the private key; Cert might have been renewed since the key is wrapped.  To recover the encrypted contents, keep the wrapped symmetric key value.
[04/Dec/2014:08:29:28 +0100] attrcrypt - All prepared ciphers are not available. Please disable attribute encryption.