13166:20120526:020254.051 In DCconfig_get_item_by_key test_host db.odbc.select[test]
*** glibc detected *** /usr/local/sbin/zabbix_server: double free or corruption (out): 0x00007fffbbab9040 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7c9e7)[0x7f249fb3f9e7]
/lib64/libc.so.6(cfree+0x73)[0x7f249fb43823]
/usr/local/sbin/zabbix_server(zbx_strdup2+0x20)[0x44d840]
/usr/local/sbin/zabbix_server[0x43ccda]
/usr/local/sbin/zabbix_server(DCconfig_get_item_by_key+0x141)[0x442851]
/usr/local/sbin/zabbix_server(process_mass_data+0xbc)[0x47410c]
/usr/local/sbin/zabbix_server(process_hist_data+0x4fb)[0x4749cb]
/usr/local/sbin/zabbix_server[0x423605]
/usr/local/sbin/zabbix_server(main_trapper_loop+0xe3)[0x423903]
/usr/local/sbin/zabbix_server(MAIN_ZABBIX_ENTRY+0x6b3)[0x413fe3]
/usr/local/sbin/zabbix_server(daemon_start+0x221)[0x449001]
/lib64/libc.so.6(__libc_start_main+0xfd)[0x7f249fae509d]
/usr/local/sbin/zabbix_server[0x40f9a9]
======= Memory map: ========
00400000-004f6000 r-xp 00000000 08:07 1186349                            /usr/local/sbin/zabbix_server
006f5000-006f6000 r--p 000f5000 08:07 1186349                            /usr/local/sbin/zabbix_server
006f6000-006fa000 rw-p 000f6000 08:07 1186349                            /usr/local/sbin/zabbix_server
006fa000-00700000 rw-p 00000000 00:00 0
015ed000-0160e000 rw-p 00000000 00:00 0                                  [heap]
0160e000-0163d000 rw-p 00000000 00:00 0                                  [heap]
0163d000-016e4000 rw-p 00000000 00:00 0                                  [heap]
7f247c000000-7f247c021000 rw-p 00000000 00:00 0
7f247c021000-7f2480000000 ---p 00000000 00:00 0
7f24832b4000-7f24832c9000 r-xp 00000000 08:02 1751                       /lib64/libgcc_s.so.1
7f24832c9000-7f24834c8000 ---p 00015000 08:02 1751                       /lib64/libgcc_s.so.1
7f24834c8000-7f24834c9000 r--p 00014000 08:02 1751                       /lib64/libgcc_s.so.1
7f24834c9000-7f24834ca000 rw-p 00015000 08:02 1751                       /lib64/libgcc_s.so.1
7f24834ca000-7f24834d4000 rw-s 00000000 00:04 21299205                   /SYSV53020130 (deleted)
7f24834d4000-7f24861d4000 rw-s 00000000 00:04 21266436                   /SYSV73020130 (deleted)
7f24861d4000-7f24960d4000 rw-s 00000000 00:04 21233667                   /SYSV67020130 (deleted)

static void    DCget_function(DC_FUNCTION *dst_function, const ZBX_DC_FUNCTION *src_function)
@@ -3281,6 +3285,8 @@
        const ZBX_DC_ITEM       *dc_item;
        const ZBX_DC_HOST       *dc_host;

+       zabbix_log(LOG_LEVEL_WARNING, "In DCconfig_get_item_by_key %s %s", host, key);
+
        LOCK_CACHE;

        if (NULL == (dc_host = DCfind_host(proxy_hostid, host)))
@@ -3296,6 +3302,8 @@
unlock:
        UNLOCK_CACHE;

+       zabbix_log(LOG_LEVEL_WARNING, "Out DCconfig_get_item_by_key");
+
        return res;
}

*************************** 5. row ***************************
               itemid: 1039650
                 type: 11
       snmp_community:
             snmp_oid:
               hostid: 74589
                 name: Test
                 key_: db.odbc.select[test]
                delay: 30
              history: 90
               trends: 365
            lastvalue: 1
            lastclock: 1337976570
            prevvalue: 1
               status: 0
           value_type: 3
        trapper_hosts: localhost
                units:
           multiplier: 0
                delta: 0
         prevorgvalue: NULL
  snmpv3_securityname:
snmpv3_securitylevel: 0
snmpv3_authpassphrase:
snmpv3_privpassphrase:
              formula: 0
                error:
          lastlogsize: 0
           logtimefmt:
           templateid: 647487
           valuemapid: 18
           delay_flex:
               params: DSN=TEST
user=11
password=11
sql=SELECT 1 from dual
          ipmi_sensor:
            data_type: 0
             authtype: 0
             username:
             password:
            publickey:
           privatekey:
                mtime: 0
               lastns: 802645635
                flags: 0
               filter:
          interfaceid: 223767
                 port:
          description:
       inventory_link: 0
             lifetime: 0
5 rows in set (0.29 sec)

Ревизия 27066. При наличии чего либо в params от прокси (или от чего либо еще) в траппер.