=====1 #0 0xffffe410 in ?? () #1 0x42839718 in ?? () #2 0x00000002 in ?? () #3 0x00000000 in ?? () #4 0x4004e05e in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0 #5 0x4004ae45 in _L_mutex_lock_205 () from /lib/tls/libpthread.so.0 #6 0x0000000c in ?? () #7 0x0000000d in ?? () #8 0x08ca4c90 in ?? () #9 0x00000000 in ?? () #10 0x4283abb0 in ?? () #11 0x42839748 in ?? () #12 0x08406d6b in safe_mutex_lock (mp=0x8c437b4, file=0x4286bbb0 "°»\206BL*Å\b°»\206B\001", line=1115920184) at thr_mutex.c:116 #13 0x08406d6b in safe_mutex_lock (mp=0x8c4379c, file=0x84ab440 "sql_acl.cc", line=3065) at thr_mutex.c:116 #14 0x0823afb9 in mysql_grant (thd=0x8ca4c90, db=0x8c94228 "test", list=@0x8ca50b8, rights=262144, revoke_grant=false) at sql_acl.cc:3065 #15 0x081abfd5 in mysql_execute_command (thd=0x8ca4c90) at sql_parse.cc:3798 #16 0x081b0873 in mysql_parse (thd=0x8ca4c90, inBuf=0x8c941c8 "grant execute on test.* to 'test'@'localhost'", length=45) at sql_parse.cc:5393 #17 0x081a5fd6 in dispatch_command (command=COM_QUERY, thd=0x8ca4c90, packet=0x8c6ebc9 "grant execute on test.* to 'test'@'localhost'", packet_length=46) at sql_parse.cc:1660 #18 0x081a57be in do_command (thd=0x8ca4c90) at sql_parse.cc:1460 #19 0x081a48c4 in handle_one_connection (arg=0x8ca4c90) at sql_parse.cc:1113 #20 0x40049aa7 in start_thread () from /lib/tls/libpthread.so.0 #21 0x4017ac2e in clone () from /lib/tls/libc.so.6 ======2 #0 0xffffe410 in ?? () #1 0x4286a228 in ?? () #2 0x00000001 in ?? () #3 0x00000000 in ?? () #4 0x4004ba56 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0 #5 0x084070b4 in safe_cond_wait (cond=0x8c9d914, mp=0x8ca446c, file=0x84e9c33 "thr_lock.c", line=413) at thr_mutex.c:202 #6 0x08404c83 in wait_for_lock (wait=0x8ca44ac, data=0x8c514f4, in_wait_list=0 '\0') at thr_lock.c:411 #7 0x0840550c in thr_lock (data=0x8c514f4, owner=0x4290deb8, lock_type=TL_READ) at thr_lock.c:677 #8 0x08405cf4 in thr_multi_lock (data=0x42922a88, count=3, owner=0x4290deb8) at thr_lock.c:919 #9 0x08189731 in mysql_lock_tables (thd=0x4290d060, tables=0x42922a48, count=3, flags=0) at lock.cc:147 #10 0x081d5239 in lock_tables (thd=0x4290d060, tables=0x4286a5d0, count=3) at sql_base.cc:2304 #11 0x081d4d24 in simple_open_n_lock_tables (thd=0x4290d060, tables=0x4286a5d0) at sql_base.cc:2146 #12 0x082316bc in acl_init (org_thd=0x8c7d5b0, dont_read_acl_tables=false) at sql_acl.cc:177 #13 0x08232a02 in acl_reload (thd=0x8c7d5b0) at sql_acl.cc:523 #14 0x081b2bbb in reload_acl_and_cache (thd=0x8c7d5b0, options=1, tables=0x0, write_to_binlog=0x4286abb7) at sql_parse.cc:6406 #15 0x081ac134 in mysql_execute_command (thd=0x8c7d5b0) at sql_parse.cc:3835 #16 0x081b0873 in mysql_parse (thd=0x8c7d5b0, inBuf=0x8c75578 "flush privileges", length=16) at sql_parse.cc:5393 #17 0x081a5fd6 in dispatch_command (command=COM_QUERY, thd=0x8c7d5b0, packet=0x8c801a1 "flush privileges", packet_length=17) at sql_parse.cc:1660 #18 0x081a57be in do_command (thd=0x8c7d5b0) at sql_parse.cc:1460 #19 0x081a48c4 in handle_one_connection (arg=0x8c7d5b0) at sql_parse.cc:1113 #20 0x40049aa7 in start_thread () from /lib/tls/libpthread.so.0 #21 0x4017ac2e in clone () from /lib/tls/libc.so.6 ====3 #0 0xffffe410 in ?? () #1 0x42808178 in ?? () #2 0x00000001 in ?? () #3 0x00000000 in ?? () #4 0x4004ba56 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0 #5 0x084070b4 in safe_cond_wait (cond=0x8c7eacc, mp=0x8ca446c, file=0x84e9c33 "thr_lock.c", line=413) at thr_mutex.c:202 #6 0x08404c83 in wait_for_lock (wait=0x8ca44bc, data=0x8cb1cac, in_wait_list=0 '\0') at thr_lock.c:411 #7 0x0840550c in thr_lock (data=0x8cb1cac, owner=0x8c9b220, lock_type=TL_WRITE) at thr_lock.c:677 #8 0x08405cf4 in thr_multi_lock (data=0x8c793f0, count=5, owner=0x8c9b220) at thr_lock.c:919 #9 0x08189731 in mysql_lock_tables (thd=0x8c9a3c8, tables=0x8c438f8, count=5, flags=0) at lock.cc:147 #10 0x081d5239 in lock_tables (thd=0x8c9a3c8, tables=0x428083e0, count=5) at sql_base.cc:2304 #11 0x081d4d24 in simple_open_n_lock_tables (thd=0x8c9a3c8, tables=0x428083e0) at sql_base.cc:2146 #12 0x0823ec5e in open_grant_tables (thd=0x8c9a3c8, tables=0x428083e0) at sql_acl.cc:4321 #13 0x0823fe4a in mysql_create_user (thd=0x8c9a3c8, list=@0x8c9a7f0) at sql_acl.cc:4886 #14 0x081ab67c in mysql_execute_command (thd=0x8c9a3c8) at sql_parse.cc:3655 #15 0x081b0873 in mysql_parse (thd=0x8c9a3c8, inBuf=0x8c43840 "create user 'test'@'localhost'", length=30) at sql_parse.cc:5393 #16 0x081a5fd6 in dispatch_command (command=COM_QUERY, thd=0x8c9a3c8, packet=0x8c64f79 "create user 'test'@'localhost'", packet_length=31) at sql_parse.cc:1660 #17 0x081a57be in do_command (thd=0x8c9a3c8) at sql_parse.cc:1460 #18 0x081a48c4 in handle_one_connection (arg=0x8c9a3c8) at sql_parse.cc:1113 #19 0x40049aa7 in start_thread () from /lib/tls/libpthread.so.0 #20 0x4017ac2e in clone () from /lib/tls/libc.so.6 Below is backtrace for my attempt to get info about processes with mysqladmin proc -uroot. mysqladmin also hangs when I tried to get this info. ======4 #0 0xffffe410 in ?? () #1 0x4289c0e8 in ?? () #2 0x00000002 in ?? () #3 0x00000000 in ?? () #4 0x4004e05e in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0 #5 0x4004ae45 in _L_mutex_lock_205 () from /lib/tls/libpthread.so.0 #6 0x0000000c in ?? () #7 0x0000000d in ?? () #8 0x08cae468 in ?? () #9 0x00000000 in ?? () #10 0x4289cbb0 in ?? () #11 0x4289c118 in ?? () #12 0x08406d6b in safe_mutex_lock (mp=0x8c437b4, file=0x4286bbb0 "°»\206BL*Å\b°»\206B\001", line=1116324232) at thr_mutex.c:116 #13 0x08406d6b in safe_mutex_lock (mp=0x8c4379c, file=0x84ab440 "sql_acl.cc", line=690) at thr_mutex.c:116 #14 0x08232eb1 in acl_getroot (thd=0x8cae468, mqh=0x4289c1f0, passwd=0x8cb8466 "", passwd_len=0) at sql_acl.cc:690 #15 0x081a2b93 in check_user (thd=0x8cae468, command=COM_CONNECT, passwd=0x8cb8466 "", passwd_len=0, db=0x0, check_count=true) at sql_parse.cc:322 #16 0x081a44b0 in check_connection (thd=0x8cae468) at sql_parse.cc:985 #17 0x081a473f in handle_one_connection (arg=0x8cae468) at sql_parse.cc:1074 #18 0x40049aa7 in start_thread () from /lib/tls/libpthread.so.0 #19 0x4017ac2e in clone () from /lib/tls/libc.so.6