// Followed steps from http://www.cyberciti.biz/faq/redhat-centos-disable-ipv6-networking/ to disable ipv6, also confirmed the same [ushastry@ushastry ~]$ ifconfig eth0 Link encap:Ethernet HWaddr 08:00:27:C6:DD:D5 inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2155 errors:0 dropped:0 overruns:0 frame:0 TX packets:992 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2341427 (2.2 MiB) TX bytes:88846 (86.7 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:4 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:200 (200.0 b) TX bytes:200 (200.0 b) virbr0 Link encap:Ethernet HWaddr 52:54:00:00:8D:1D inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) [root@ushastry 5.6.23]# valgrind --track-origins=yes --track-fds=yes -v --show-reachable=yes --leak-check=full --num-callers=50 --db-attach=yes --tool=memcheck /home/ushastry/Downloads/5.6.23/bin/mysqld --no-defaults --basedir=/home/ushastry/Downloads/5.6.23 --datadir=/home/ushastry/Downloads/5.6.23/data --core-file --socket=/tmp/mysql_ushastry.sock --port=15000 --log-error=/home/ushastry/Downloads/5.6.23/data/log.err --user=root ==3072== Memcheck, a memory error detector ==3072== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. ==3072== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info ==3072== Command: /home/ushastry/Downloads/5.6.23/bin/mysqld --no-defaults --basedir=/home/ushastry/Downloads/5.6.23 --datadir=/home/ushastry/Downloads/5.6.23/data --core-file --socket=/tmp/mysql_ushastry.sock --port=15000 --log-error=/home/ushastry/Downloads/5.6.23/data/log.err --user=root ==3072== --3072-- Valgrind options: --3072-- --track-origins=yes --3072-- --track-fds=yes --3072-- -v --3072-- --show-reachable=yes --3072-- --leak-check=full --3072-- --num-callers=50 --3072-- --db-attach=yes --3072-- --tool=memcheck --3072-- Contents of /proc/version: --3072-- Linux version 2.6.32-504.8.1.el6.x86_64 (mockbuild@c6b9.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC) ) #1 SMP Wed Jan 28 21:11:36 UTC 2015 --3072-- Arch and hwcaps: AMD64, amd64-sse3 --3072-- Page sizes: currently 4096, max supported 4096 --3072-- Valgrind library directory: /usr/lib64/valgrind --3072-- Reading syms from /home/ushastry/Downloads/5.6.23/bin/mysqld --3072-- warning: DiCfSI 0x0 .. 0x0 outside mapped rw segments (NONE) --3072-- warning: DiCfSI 0x1 .. 0x3 outside mapped rw segments (NONE) --3072-- warning: DiCfSI 0x4 .. 0xf outside mapped rw segments (NONE) --3072-- warning: DiCfSI 0x10 .. 0x89 outside mapped rw segments (NONE) --3072-- Reading syms from /usr/lib64/valgrind/memcheck-amd64-linux --3072-- object doesn't have a dynamic symbol table --3072-- Reading syms from /lib64/ld-2.12.so --3072-- Scheduler: using generic scheduler lock implementation. --3072-- Reading suppressions file: /usr/lib64/valgrind/default.supp ==3072== embedded gdbserver: reading from /tmp/vgdb-pipe-from-vgdb-to-3072-by-ushastry-on-ushastry ==3072== embedded gdbserver: writing to /tmp/vgdb-pipe-to-vgdb-from-3072-by-ushastry-on-ushastry ==3072== embedded gdbserver: shared mem /tmp/vgdb-pipe-shared-mem-vgdb-3072-by-ushastry-on-ushastry ==3072== ==3072== TO CONTROL THIS PROCESS USING vgdb (which you probably ==3072== don't want to do, unless you know exactly what you're doing, ==3072== or are doing some strange experiment): ==3072== /usr/lib64/valgrind/../../bin/vgdb --pid=3072 ...command... ==3072== ==3072== TO DEBUG THIS PROCESS USING GDB: start GDB like this ==3072== /path/to/gdb /home/ushastry/Downloads/5.6.23/bin/mysqld ==3072== and then give GDB the following command ==3072== target remote | /usr/lib64/valgrind/../../bin/vgdb --pid=3072 ==3072== --pid is optional if only one valgrind process is running ==3072== --3072-- REDIR: 0x34206176d0 (strlen) redirected to 0x38049551 (vgPlain_amd64_linux_REDIR_FOR_strlen) --3072-- Reading syms from /usr/lib64/valgrind/vgpreload_core-amd64-linux.so --3072-- Reading syms from /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so --3072-- REDIR: 0x34206174e0 (index) redirected to 0x4a07c30 (index) --3072-- REDIR: 0x3420617560 (strcmp) redirected to 0x4a08570 (strcmp) --3072-- Reading syms from /lib64/libpthread-2.12.so --3072-- Reading syms from /lib64/libaio.so.1.0.1 --3072-- object doesn't have a symbol table --3072-- Reading syms from /lib64/librt-2.12.so --3072-- Reading syms from /lib64/libcrypt-2.12.so --3072-- Reading syms from /lib64/libdl-2.12.so --3072-- Reading syms from /usr/lib64/libstdc++.so.6.0.13 --3072-- object doesn't have a symbol table --3072-- Reading syms from /lib64/libm-2.12.so --3072-- Reading syms from /lib64/libgcc_s-4.4.7-20120601.so.1 --3072-- object doesn't have a symbol table --3072-- Reading syms from /lib64/libc-2.12.so --3072-- Reading syms from /lib64/libfreebl3.so --3072-- object doesn't have a symbol table --3072-- REDIR: 0x3420a84cd0 (strcasecmp) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a86f90 (strncasecmp) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a81160 (__GI_strlen) redirected to 0x4a07fb0 (__GI_strlen) --3072-- REDIR: 0x3420a82c40 (__GI_strrchr) redirected to 0x4a07ab0 (__GI_strrchr) --3072-- REDIR: 0x3420a7f6e0 (strcmp) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a7f720 (__GI_strcmp) redirected to 0x4a08520 (__GI_strcmp) --3072-- REDIR: 0x3420a839a0 (memset) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a8df70 (__memset_x86_64) redirected to 0x4a09a50 (memset) --3072-- REDIR: 0x3420a81240 (strnlen) redirected to 0x4a07f30 (strnlen) --3072-- REDIR: 0x3420a83800 (memmove) redirected to 0x4a09af0 (memmove) --3072-- REDIR: 0x3420a81120 (strlen) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a7a280 (calloc) redirected to 0x4a05717 (calloc) --3072-- REDIR: 0x3420a7a640 (malloc) redirected to 0x4a069ac (malloc) --3072-- REDIR: 0x3420a7b520 (free) redirected to 0x4a063a9 (free) --3072-- REDIR: 0x3420a81390 (__GI_strncmp) redirected to 0x4a08470 (__GI_strncmp) --3072-- REDIR: 0x3420a80b70 (strcpy) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a80ba0 (__GI_strcpy) redirected to 0x4a080a0 (__GI_strcpy) --3072-- REDIR: 0x3420a89670 (memcpy) redirected to 0x4a08b60 (memcpy) --3072-- REDIR: 0x3420a82c10 (rindex) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a7f630 (index) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a7f660 (__GI_strchr) redirected to 0x4a07b70 (__GI_strchr) --3072-- REDIR: 0x3420a84b50 (stpcpy) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a84b80 (__GI_stpcpy) redirected to 0x4a097e0 (__GI_stpcpy) --3072-- REDIR: 0x3420a7ba10 (realloc) redirected to 0x4a06b57 (realloc) --3072-- REDIR: 0x342b2bd0a0 (operator new(unsigned long)) redirected to 0x4a0757a (operator new(unsigned long)) --3072-- REDIR: 0x342b2bb2f0 (operator delete(void*)) redirected to 0x4a05f8f (operator delete(void*)) --3072-- REDIR: 0x3420a8aaf0 (strchrnul) redirected to 0x4a09fb0 (strchrnul) --3072-- REDIR: 0x3420a84500 (mempcpy) redirected to 0x4a0a020 (mempcpy) --3072-- REDIR: 0xffffffffff600000 (???) redirected to 0x38049533 (vgPlain_amd64_linux_REDIR_FOR_vgettimeofday) --3072-- REDIR: 0x3420a7b4b0 (posix_memalign) redirected to 0x4a055fb (posix_memalign) --3072-- REDIR: 0x3420a82be0 (strncpy) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0x3420a8dde0 (__GI_strncpy) redirected to 0x4a082c0 (__GI_strncpy) --3072-- REDIR: 0x3420a81350 (strncmp) redirected to 0x480155c (_vgnU_ifunc_wrapper) --3072-- REDIR: 0xffffffffff600400 (???) redirected to 0x3804953d (vgPlain_amd64_linux_REDIR_FOR_vtime) --3072-- REDIR: 0x3420a8aaa0 (__GI___rawmemchr) redirected to 0x4a0a000 (__GI___rawmemchr) 2015-02-09 15:33:15 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). --3072-- REDIR: 0x342b2bd140 (operator new(unsigned long, std::nothrow_t const&)) redirected to 0x4a0684a (operator new(unsigned long, std::nothrow_t const&)) --3072-- REDIR: 0x3420a83350 (memchr) redirected to 0x4a08610 (memchr) --3072-- REDIR: 0x342b2bd200 (operator new[](unsigned long, std::nothrow_t const&)) redirected to 0x4a06637 (operator new[](unsigned long, std::nothrow_t const&)) --3072-- REDIR: 0x342b2bb330 (operator delete[](void*)) redirected to 0x4a05adf (operator delete[](void*)) --3072-- REDIR: 0x3420a84d10 (__strcasecmp_sse2) redirected to 0x4a0aae0 (strcasecmp) ==3072== Warning: invalid file descriptor -1 in syscall close() <------------------------ ==3072== at 0x342120E7BD: ??? (in /lib64/libpthread-2.12.so) ==3072== by 0x583330: network_init() (mysql_socket.h:1090) ==3072== by 0x586421: mysqld_main(int, char**) (mysqld.cc:5521) ==3072== by 0x3420A1ED5C: (below main) (in /lib64/libc-2.12.so)