==6946== Thread 1:
==6946== Invalid write of size 4
==6946==    at 0x629E3E7: init (io-stats.c:2476)
==6946==    by 0x405E9B5: __xlator_init (xlator.c:1353)
==6946==    by 0x405EAC5: xlator_init (xlator.c:1381)
==6946==    by 0x408E968: glusterfs_graph_init (graph.c:328)
==6946==    by 0x408EF9D: glusterfs_graph_activate (graph.c:501)
==6946==    by 0x804DB85: glusterfs_process_volfp (glusterfsd.c:1372)
==6946==    by 0x804F34F: mgmt_getspec_cbk (glusterfsd-mgmt.c:672)
==6946==    by 0x40AC20D: rpc_clnt_handle_reply (rpc-clnt.c:736)
==6946==    by 0x40AC45B: rpc_clnt_notify (rpc-clnt.c:849)
==6946==    by 0x40A9207: rpc_transport_notify (rpc-transport.c:902)
==6946==    by 0x403130A: socket_event_poll_in (socket.c:1641)
==6946==    by 0x403182E: socket_event_handler (socket.c:1756)
==6946==  Address 0x598757c is 0 bytes after a block of size 4 alloc'd
==6946==    at 0x4022B49: calloc (vg_replace_malloc.c:397)
==6946==    by 0x40847F4: __gf_default_calloc (mem-pool.h:83)
==6946==    by 0x408471A: __gf_calloc (mem-pool.c:135)
==6946==    by 0x629E316: init (io-stats.c:2466)
==6946==    by 0x405E9B5: __xlator_init (xlator.c:1353)
==6946==    by 0x405EAC5: xlator_init (xlator.c:1381)
==6946==    by 0x408E968: glusterfs_graph_init (graph.c:328)
==6946==    by 0x408EF9D: glusterfs_graph_activate (graph.c:501)
==6946==    by 0x804DB85: glusterfs_process_volfp (glusterfsd.c:1372)
==6946==    by 0x804F34F: mgmt_getspec_cbk (glusterfsd-mgmt.c:672)
==6946==    by 0x40AC20D: rpc_clnt_handle_reply (rpc-clnt.c:736)
==6946==    by 0x40AC45B: rpc_clnt_notify (rpc-clnt.c:849)