Today my zabbix server is crashed. I attached log file.

52033:20131220:052146.772 ====== Fatal information: ======
52033:20131220:052146.772 Program counter: 0x45f695
52033:20131220:052146.772 === Registers: ===
52033:20131220:052146.772 r8 = e8 = 232 = 232
52033:20131220:052146.773 r9 = 3ee0 = 16096 = 16096
52033:20131220:052146.773 r10 = 57202030203a7365 = 6278053271625692005 = 6278053271625692005
52033:20131220:052146.773 r11 = 206 = 518 = 518
52033:20131220:052146.773 r12 = 7ffdfbbc8000 = 140728826888192 = 140728826888192
52033:20131220:052146.773 r13 = 7ffdfc176780 = 140728832845696 = 140728832845696
52033:20131220:052146.773 r14 = 7ffdfc171c60 = 140728832826464 = 140728832826464
52033:20131220:052146.773 r15 = 7ffdfc1e0500 = 140728833279232 = 140728833279232
52033:20131220:052146.773 rdi = 7ffdfbbc8000 = 140728826888192 = 140728826888192
52033:20131220:052146.773 rsi = 7ffdfc361a40 = 140728834857536 = 140728834857536
52033:20131220:052146.773 rbp = 4b10 = 19216 = 19216
52033:20131220:052146.773 rbx = 7ffdfc35cf20 = 140728834838304 = 140728834838304
52033:20131220:052146.773 rdx = 0 = 0 = 0
52033:20131220:052146.773 rax = 7ffdfc171c70 = 140728832826480 = 140728832826480
52033:20131220:052146.773 rcx = 0 = 0 = 0
52033:20131220:052146.773 rsp = 7fff63030aa0 = 140734854531744 = 140734854531744
52033:20131220:052146.773 rip = 45f695 = 4585109 = 4585109
52033:20131220:052146.773 efl = 10202 = 66050 = 66050
52033:20131220:052146.773 csgsfs = 33 = 51 = 51
52033:20131220:052146.773 err = 0 = 0 = 0
52033:20131220:052146.773 trapno = d = 13 = 13
52033:20131220:052146.773 oldmask = 0 = 0 = 0
52033:20131220:052146.773 cr2 = 0 = 0 = 0
52033:20131220:052146.773 === Backtrace: ===
52033:20131220:052146.892 13: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history](print_fatal_info+0x280) [0x464e80]
52033:20131220:052146.892 12: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history]() [0x4655ac]
52033:20131220:052146.892 11: /lib64/libc.so.6() [0x3bd1232960]
52033:20131220:052146.892 10: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history]() [0x45f695]
52033:20131220:052146.892 9: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history](__zbx_mem_malloc+0x54) [0x45fc04]
52033:20131220:052146.893 8: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history]() [0x45d55b]
52033:20131220:052146.893 7: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history]() [0x45d5c9]
52033:20131220:052146.893 6: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history](zbx_vc_add_value+0x1b8) [0x45ed18]
52033:20131220:052146.893 5: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history](DCsync_history+0x1a16) [0x4509f6]
52033:20131220:052146.893 4: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history](main_dbsyncer_loop+0x1d0) [0x4192c0]
52033:20131220:052146.893 3: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history](MAIN_ZABBIX_ENTRY+0xac7) [0x418287]
52033:20131220:052146.893 2: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history](daemon_start+0x1cd) [0x46428d]
52033:20131220:052146.893 1: /lib64/libc.so.6(__libc_start_main+0xfd) [0x3bd121ecdd]
52033:20131220:052146.893 0: zabbix_server: history syncer #1 [synced 0 items in 0.000002 sec, syncing history]() [0x412b09]
52033:20131220:052146.893 === Memory map: ===
52033:20131220:052146.893 00400000-00502000 r-xp 00000000 fd:00 1985272 /usr/sbin/zabbix_server_mysql
52033:20131220:052146.893 00702000-00756000 rw-p 00102000 fd:00 1985272 /usr/sbin/zabbix_server_mysql
52033:20131220:052146.893 00756000-0075d000 rw-p 00000000 00:00 0
52033:20131220:052146.893 00955000-0095c000 rw-p 00155000 fd:00 1985272 /usr/sbin/zabbix_server_mysql
52033:20131220:052146.893 023d8000-023f9000 rw-p 00000000 00:00 0
52033:20131220:052146.893 023f9000-02849000 rw-p 00000000 00:00 0
52033:20131220:052146.893 307ca00000-307cb36000 r-xp 00000000 fd:00 1985731 /usr/lib64/mysql/libmysqlclient.so.16.0.0
52033:20131220:052146.893 307cb36000-307cd35000 ---p 00136000 fd:00 1985731 /usr/lib64/mysql/libmysqlclient.so.16.0.0
52033:20131220:052146.893 307cd35000-307cd83000 rw-p 00135000 fd:00 1985731 /usr/lib64/mysql/libmysqlclient.so.16.0.0
52033:20131220:052146.893 307ce00000-307ce09000 r-xp 00000000 fd:00 1985744 /usr/lib64/libltdl.so.7.2.1
52033:20131220:052146.893 307ce09000-307d008000 ---p 00009000 fd:00 1985744 /usr/lib64/libltdl.so.7.2.1
52033:20131220:052146.893 307d008000-307d009000 rw-p 00008000 fd:00 1985744 /usr/lib64/libltdl.so.7.2.1
52033:20131220:052146.893 307d200000-307d20e000 r-xp 00000000 fd:00 655580 /lib64/liblber-2.4.so.2.5.6
52033:20131220:052146.893 307d20e000-307d40d000 ---p 0000e000 fd:00 655580 /lib64/liblber-2.4.so.2.5.6
52033:20131220:052146.893 307d40d000-307d40e000 r--p 0000d000 fd:00 655580 /lib64/liblber-2.4.so.2.5.6
52033:20131220:052146.893 307d40e000-307d40f000 rw-p 0000e000 fd:00 655580 /lib64/liblber-2.4.so.2.5.6
52033:20131220:052146.893 307d600000-307d632000 r-xp 00000000 fd:00 655416 /lib64/libidn.so.11.6.1
52033:20131220:052146.893 307d632000-307d831000 ---p 00032000 fd:00 655416 /lib64/libidn.so.11.6.1
52033:20131220:052146.893 307d831000-307d832000 rw-p 00031000 fd:00 655416 /lib64/libidn.so.11.6.1
52033:20131220:052146.893 307da00000-307da51000 r-xp 00000000 fd:00 1985736 /usr/lib64/libcurl.so.4.1.1
52033:20131220:052146.893 307da51000-307dc51000 ---p 00051000 fd:00 1985736 /usr/lib64/libcurl.so.4.1.1
52033:20131220:052146.893 307dc51000-307dc54000 rw-p 00051000 fd:00 1985736 /usr/lib64/libcurl.so.4.1.1
52033:20131220:052146.893 307de00000-307de49000 r-xp 00000000 fd:00 655843 /lib64/libldap-2.4.so.2.5.6
52033:20131220:052146.893 307de49000-307e049000 ---p 00049000 fd:00 655843 /lib64/libldap-2.4.so.2.5.6
52033:20131220:052146.893 307e049000-307e04b000 r--p 00049000 fd:00 655843 /lib64/libldap-2.4.so.2.5.6
52033:20131220:052146.893 307e04b000-307e04d000 rw-p 0004b000 fd:00 655843 /lib64/libldap-2.4.so.2.5.6
52033:20131220:052146.893 307e200000-307e225000 r-xp 00000000 fd:00 1985635 /usr/lib64/libnssutil3.so
52033:20131220:052146.893 307e225000-307e424000 ---p 00025000 fd:00 1985635 /usr/lib64/libnssutil3.so
52033:20131220:052146.893 307e424000-307e42a000 r--p 00024000 fd:00 1985635 /usr/lib64/libnssutil3.so
52033:20131220:052146.893 307e42a000-307e42b000 rw-p 0002a000 fd:00 1985635 /usr/lib64/libnssutil3.so
52033:20131220:052146.893 307e600000-307e603000 r-xp 00000000 fd:00 655406 /lib64/libplds4.so
52033:20131220:052146.894 307e603000-307e802000 ---p 00003000 fd:00 655406 /lib64/libplds4.so
52033:20131220:052146.894 307e802000-307e803000 r--p 00002000 fd:00 655406 /lib64/libplds4.so
52033:20131220:052146.894 307e803000-307e804000 rw-p 00003000 fd:00 655406 /lib64/libplds4.so
52033:20131220:052146.894 307ea00000-307ea28000 r-xp 00000000 fd:00 1985735 /usr/lib64/libsmime3.so
52033:20131220:052146.894 307ea28000-307ec28000 ---p 00028000 fd:00 1985735 /usr/lib64/libsmime3.so
52033:20131220:052146.894 307ec28000-307ec2b000 r--p 00028000 fd:00 1985735 /usr/lib64/libsmime3.so
52033:20131220:052146.894 307ec2b000-307ec2c000 rw-p 0002b000 fd:00 1985735 /usr/lib64/libsmime3.so
52033:20131220:052146.894 307ee00000-307ef35000 r-xp 00000000 fd:00 1985733 /usr/lib64/libnss3.so