I have install Kamailio 4.1 with MySQL database so all users stored in MySQL (authentication), Later I have installed FreeRadius for accounting only, Just accounting (Invite/Bye). In short MySQL for authentication and FreeRadius for accounting ( CDRTool).

Problems: If i register user using SIP phone and call other SIP extension then freeradius start accounting and insert entry in MySQL/radaccts tables if i end call then it doesn't update END accounting  ( Bye ). I have google it everywhere but didn't get single clue so i hope i get something here from you guys

-- kamailio.cfg  ( default file i just add following radius section)

loadmodule "acc.so"
loadmodule "acc_radius.so"
...
...
# ------- FreeRadius Accounting -------
modparam("acc_radius", "radius_flag", 1)
modparam("acc_radius", "radius_missed_flag", 2)
modparam("acc", "log_flag", 1)
modparam("acc", "log_missed_flag", 1)
modparam("acc_radius", "service_type", 15)
modparam("acc_radius", "radius_config", "/etc/radiusclient-ng/radiusclient.conf")
modparam("acc_radius", "radius_extra", "User-Name=$Au")

-- /etc/freeradius/sql.conf

sql {
    driver                      = "rlm_sql_mysql"
    server                      = "localhost"
    login                       = "radius"
    password                    = "radius"
    radius_db                   = "radius"
    sqltrace                    = no
    sqltracefile                = ${logdir}/sqltrace-%Y%m%d.log
    num_sql_socks               = 25
    connect_failure_retry_delay = 60

    accounting_start_query      = "\
          CALL insert_radacct_record( \
                'radius', \
                '%{Acct-Session-Id}', \
                '%{Acct-Unique-Session-Id}', \
                '%{Billing-Party}', \
                '%{Billing-Party}', \
                '%{SIP-Proxy-IP}', \
                '%{NAS-Port}', \
                FROM_UNIXTIME('%S'), \
                '0', \
                '0', \
                '0', \
                '0', \
                '%{Called-Station-Id}', \
                '%{Calling-Station-Id}', \
                '%{Sip-Response-Code}', \
                '%{Service-Type}', \
                '%{ENUM-TLD}', \
                '%{Framed-IP-Address}', \
                 UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \
                 UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \
                '%{Sip-Response-Code}', \
                '%{Sip-Method}', \
                '%{Sip-Translated-Request-URI}', \
                '%{Sip-To-Tag}', \
                '%{Sip-From-Tag}', \
                '%{Sip-RPId}', \
                '%{Source-IP}', \
                '%{Source-Port}', \
                '%{Canonical-URI}', \
                '', \
                '', \
                '%{Sip-Application-Type}', \
                '%{User-Agent}', \
                '%{From-Header}' \
                )"

    accounting_stop_query       = "\
          CALL update_radacct_record( \
                'radius', \
                FROM_UNIXTIME('%S'), \
                UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \
                '', \
                '%{X-RTP-Stat}', \
                '%{Acct-Session-Id}', \
                '%{Sip-To-Tag}', \
                '%{Sip-From-Tag}' \
                )"

-- Radius logs

rad_recv: Accounting-Request packet from host 127.0.0.1 port 36379, id=11, length=152
        Acct-Status-Type = Start
        Service-Type = Sip-Session
        Sip-Response-Code = 200
        Sip-Method = Invite
        Event-Timestamp = "Aug 12 2014 22:45:36 EDT"
        Sip-From-Tag = "59eb1875"
        Sip-To-Tag = "d443e36e"
        Acct-Session-Id = "M2IwZTVkY2Y5YTU2ZjdmOTQ5NWMzYzI1NTU3MWMwYjQ."
        User-Name = "2002@192.168.1.5"
        NAS-Port = 5060
        Acct-Delay-Time = 0
        NAS-IP-Address = 127.0.0.1
Tue Aug 12 22:45:36 2014 : Info: # Executing section preacct from file /etc/freeradius/sites-enabled/default
Tue Aug 12 22:45:36 2014 : Info: +- entering group preacct {...}
Tue Aug 12 22:45:36 2014 : Info: ++[preprocess] returns ok
Tue Aug 12 22:45:36 2014 : Info: [acct_unique] Hashing 'NAS-Port = 5060,Client-IP-Address = 127.0.0.1,NAS-IP-Address = 127.0.0.1,Acct-Session-Id = "M2IwZTVkY2Y5YTU2ZjdmOTQ5NWMzYzI1NTU3MWMwYjQ.",User-Name = "2002@192.168.1.5"'
Tue Aug 12 22:45:36 2014 : Info: [acct_unique] Acct-Unique-Session-ID = "117c7740de62ba6c".
Tue Aug 12 22:45:36 2014 : Info: ++[acct_unique] returns ok
Tue Aug 12 22:45:36 2014 : Info: [suffix] Looking up realm "192.168.1.5" for User-Name = "2002@192.168.1.5"
Tue Aug 12 22:45:36 2014 : Info: [suffix] No such realm "192.168.1.5"
Tue Aug 12 22:45:36 2014 : Info: ++[suffix] returns noop
Tue Aug 12 22:45:36 2014 : Info: ++[files] returns noop
Tue Aug 12 22:45:36 2014 : Info: # Executing section accounting from file /etc/freeradius/radiusd.conf
Tue Aug 12 22:45:36 2014 : Info: +- entering group accounting {...}
Tue Aug 12 22:45:36 2014 : Info: [detail]       expand: /var/log/freeradius/radacct/%{Client-IP-Address}/detail-%Y%m%d -> /var/log/freeradius/radacct/127.0.0.1/detail-20140812
Tue Aug 12 22:45:36 2014 : Info: [detail] /var/log/freeradius/radacct/%{Client-IP-Address}/detail-%Y%m%d expands to /var/log/freeradius/radacct/127.0.0.1/detail-20140812
Tue Aug 12 22:45:36 2014 : Info: [detail]       expand: %t -> Tue Aug 12 22:45:36 2014
Tue Aug 12 22:45:36 2014 : Info: ++[detail] returns ok
Tue Aug 12 22:45:36 2014 : Info: [sql]  expand:           CALL insert_radacct_record(                 'radius',                 '%{Acct-Session-Id}',                 '%{Acct-Unique-Session-Id}',                 '%{Billing-Party}',                 '%{Billing-Party}',                 '%{SIP-Proxy-IP}',                 '%{NAS-Port}',                 FROM_UNIXTIME('%S'),                 '0',                 '0',                 '0',                 '0',                 '%{Called-Station-Id}',                 '%{Calling-Station-Id}',                 '%{Sip-Response-Code}',                 '%{Service-Type}',                 '%{ENUM-TLD}',                 '%{Framed-IP-Address}',                  UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}',                  UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}',                 '%{Sip-Response-Code}',                 '%{Sip-Method}',                 '%{Sip-Translated-Request-URI}',                 '%{Sip-To-Tag}',                 '%{Sip-From-Tag}',                 '%{Sip-RPId}',                 '%{Source-IP}'
Tue Aug 12 22:45:36 2014 : Debug: rlm_sql (sql): Reserving sql socket id: 24
Tue Aug 12 22:45:36 2014 : Debug: rlm_sql (sql): Released sql socket id: 24
Tue Aug 12 22:45:36 2014 : Info: ++[sql] returns ok
Sending Accounting-Response of id 11 to 127.0.0.1 port 36379
Tue Aug 12 22:45:36 2014 : Info: Finished request 0.
Tue Aug 12 22:45:36 2014 : Info: Cleaning up request 0 ID 11 with timestamp +13
Tue Aug 12 22:45:36 2014 : Debug: Going to the next request
Tue Aug 12 22:45:36 2014 : Info: Ready to process requests.




rad_recv: Accounting-Request packet from host 127.0.0.1 port 35683, id=149, length=152
        Acct-Status-Type = Stop
        Service-Type = Sip-Session
        Sip-Response-Code = 200
        Sip-Method = Bye
        Event-Timestamp = "Aug 12 2014 22:46:20 EDT"
        Sip-From-Tag = "59eb1875"
        Sip-To-Tag = "d443e36e"
        Acct-Session-Id = "M2IwZTVkY2Y5YTU2ZjdmOTQ5NWMzYzI1NTU3MWMwYjQ."
        User-Name = "2002@192.168.1.5"
        NAS-Port = 5060
        Acct-Delay-Time = 0
        NAS-IP-Address = 127.0.0.1
Tue Aug 12 22:46:20 2014 : Info: # Executing section preacct from file /etc/freeradius/sites-enabled/default
Tue Aug 12 22:46:20 2014 : Info: +- entering group preacct {...}
Tue Aug 12 22:46:20 2014 : Info: ++[preprocess] returns ok
Tue Aug 12 22:46:20 2014 : Info: [acct_unique] Hashing 'NAS-Port = 5060,Client-IP-Address = 127.0.0.1,NAS-IP-Address = 127.0.0.1,Acct-Session-Id = "M2IwZTVkY2Y5YTU2ZjdmOTQ5NWMzYzI1NTU3MWMwYjQ.",User-Name = "2002@192.168.1.5"'
Tue Aug 12 22:46:20 2014 : Info: [acct_unique] Acct-Unique-Session-ID = "117c7740de62ba6c".
Tue Aug 12 22:46:20 2014 : Info: ++[acct_unique] returns ok
Tue Aug 12 22:46:20 2014 : Info: [suffix] Looking up realm "192.168.1.5" for User-Name = "2002@192.168.1.5"
Tue Aug 12 22:46:20 2014 : Info: [suffix] No such realm "192.168.1.5"
Tue Aug 12 22:46:20 2014 : Info: ++[suffix] returns noop
Tue Aug 12 22:46:20 2014 : Info: ++[files] returns noop
Tue Aug 12 22:46:20 2014 : Info: # Executing section accounting from file /etc/freeradius/radiusd.conf
Tue Aug 12 22:46:20 2014 : Info: +- entering group accounting {...}
Tue Aug 12 22:46:20 2014 : Info: [detail]       expand: /var/log/freeradius/radacct/%{Client-IP-Address}/detail-%Y%m%d -> /var/log/freeradius/radacct/127.0.0.1/detail-20140812
Tue Aug 12 22:46:20 2014 : Info: [detail] /var/log/freeradius/radacct/%{Client-IP-Address}/detail-%Y%m%d expands to /var/log/freeradius/radacct/127.0.0.1/detail-20140812
Tue Aug 12 22:46:20 2014 : Info: [detail]       expand: %t -> Tue Aug 12 22:46:20 2014
Tue Aug 12 22:46:20 2014 : Info: ++[detail] returns ok
Tue Aug 12 22:46:20 2014 : Info: [sql]  expand:           CALL update_radacct_record(                 'radius',                 FROM_UNIXTIME('%S'),                 UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}',                 '',                 '%{X-RTP-Stat}',          '%{Acct-Session-Id}',                 '%{Sip-To-Tag}',                 '%{Sip-From-Tag}'                 ) ->     CALL update_radacct_record(                 'radius',                 FROM_UNIXTIME('2014-08-12 22:46:20'),                 UNIX_TIMESTAMP('2014-08-12 22:46:20') - 'Aug 12 2014 22:46:20 EDT',                 '',                 '',               'M2IwZTVkY2Y5YTU2ZjdmOTQ5NWMzYzI1NTU3MWMwYjQ.',                 'd443e36e',                 '59eb1875'                 )
Tue Aug 12 22:46:20 2014 : Debug: rlm_sql (sql): Reserving sql socket id: 23
Tue Aug 12 22:46:20 2014 : Info: [sql]  expand: stop packet with zero session length. [user '%{User-Name}', nas '%{NAS-IP-Address}'] -> stop packet with zero session length. [user '2002@192.168.1.5', nas '127.0.0.1']
Tue Aug 12 22:46:20 2014 : Info: [sql] stop packet with zero session length. [user '2002@192.168.1.5', nas '127.0.0.1']
Tue Aug 12 22:46:20 2014 : Debug: rlm_sql (sql): Released sql socket id: 23
Tue Aug 12 22:46:20 2014 : Info: ++[sql] returns noop
Sending Accounting-Response of id 149 to 127.0.0.1 port 35683
Tue Aug 12 22:46:20 2014 : Info: Finished request 1.
Tue Aug 12 22:46:20 2014 : Info: Cleaning up request 1 ID 149 with timestamp +57
Tue Aug 12 22:46:20 2014 : Debug: Going to the next request
Tue Aug 12 22:46:20 2014 : Info: Ready to process requests.

-- SQL tables ( Time is wired 1969 )

mysql> select * from radacct196912;
+-----------+----------------------------------------------+------------------+----------+-------+--------------+-----------+-------------+---------------------+---------------------+-----------------+---------------+-------------------+------------------+-----------------+------------------+-----------------+------------------+--------------------+-------------+---------+-----------------+----------------+---------------+-----------+-----------------+----------+------------+-------------------------+---------------+--------------------+-----------+---------+---------------+----------+------------+--------------+-----------+-----------+---------------+------+-------+------------+-----------+-----------+---------------+------------+-----------+---------+
| RadAcctId | AcctSessionId                                | AcctUniqueId     | UserName | Realm | NASIPAddress | NASPortId | NASPortType | AcctStartTime       | AcctStopTime        | AcctSessionTime | AcctAuthentic | ConnectInfo_start | ConnectInfo_stop | AcctInputOctets | AcctOutputOctets | CalledStationId | CallingStationId | AcctTerminateCause | ServiceType | ENUMtld | FramedIPAddress | AcctStartDelay | AcctStopDelay | SipMethod | SipResponseCode | SipToTag | SipFromTag | SipTranslatedRequestURI | SipUserAgents | SipApplicationType | SipCodecs | SipRPID | SipRPIDHeader | SourceIP | SourcePort | CanonicalURI | DelayTime | Timestamp | DestinationId | Rate | Price | Normalized | BillingId | MediaInfo | RTPStatistics | FromHeader | UserAgent | Contact |
+-----------+----------------------------------------------+------------------+----------+-------+--------------+-----------+-------------+---------------------+---------------------+-----------------+---------------+-------------------+------------------+-----------------+------------------+-----------------+------------------+--------------------+-------------+---------+-----------------+----------------+---------------+-----------+-----------------+----------+------------+-------------------------+---------------+--------------------+-----------+---------+---------------+----------+------------+--------------+-----------+-----------+---------------+------+-------+------------+-----------+-----------+---------------+------------+-----------+---------+
|         1 | Y2ExZjhkMTU4ODRmN2MwMGM1N2Q1Y2E5YTA5ZjAzNjg  | e46f9d0439141495 |          |       |              | 5060      |             | 1969-12-31 19:00:00 | 1969-12-31 19:00:00 |               0 | NULL          | NULL              |                  |               0 |                0 |                 |                  | 200                | Sip-Session |         |                 |     1407883391 |             0 | Invite    |             200 | 70cc9216 | e2cb1f0c   |                         |               |                    |           |         |               |          |            |              |           |         0 |               |      |  NULL | 0          |           | NULL      |               |            |           |         |
|         2 | MzYyY2JhM2Q3MzEyN2U1ODJkMDA1NGNiMTMzYmE0OTc  | aa9b8bcb6effa2c7 |          |       |              | 5060      |             | 1969-12-31 19:00:00 | 1969-12-31 19:00:00 |               0 | NULL          | NULL              |                  |               0 |                0 |                 |                  | 200                | Sip-Session |         |                 |              0 |             0 | Invite    |             200 | c6ea6056 | 407f047e   |                         |               |                    |           |         |               |          |            |              |           |         0 |               |      |  NULL | 0          |           | NULL      |               |            |           |         |
|         3 | M2IwZTVkY2Y5YTU2ZjdmOTQ5NWMzYzI1NTU3MWMwYjQ. | 117c7740de62ba6c |          |       |              | 5060      |             | 1969-12-31 19:33:34 | 1969-12-31 19:33:34 |               0 | NULL          | NULL              |                  |               0 |                0 |                 |                  | 200                | Sip-Session |         |                 |     1407897936 |    1407897980 | Invite    |             200 | d443e36e | 59eb1875   |                         |               |                    |           |         |               |          |            |              |           |         0 |               |      |  NULL | 0          |           | NULL      |               |            |           |         |
+-----------+----------------------------------------------+------------------+----------+-------+--------------+-----------+-------------+---------------------+---------------------+-----------------+---------------+-------------------+------------------+-----------------+------------------+-----------------+------------------+--------------------+-------------+---------+-----------------+----------------+---------------+-----------+-----------------+----------+------------+-------------------------+---------------+--------------------+-----------+---------+---------------+----------+------------+--------------+-----------+-----------+---------------+------+-------+------------+-----------+-----------+---------------+------------+-----------+---------+
3 rows in set (0.00 sec)