Problem running memcached on AMD64 and CentOS 3.6

Brad Fitzpatrick brad at danga.com
Mon Dec 26 23:10:43 UTC 2005


Exact same thing:

epoll_ctl_old(0x4, 0x1, 0x3, 0x7fffff8970a0) = -1 ENOSYS (Function not implemented)

My guess is your libevent is using the old 64-bit epoll ABI and CentOS
phased that out?  You probably have to rebuild libevent to use the newer
epoll system calls, but I know nothing about that.

- Brad


On Mon, 26 Dec 2005, Jonathan Chong wrote:

> If it helps, this is the strace after the changes:
>
> execve("/usr/bin/memcached", ["memcached", "-u", "nobody", "-m",
> "128", "-l", "127.0.0.1", "-p", "11211"], [/* 24 vars */]) = 0
> uname({sys="Linux", node="vps.arsenal-mania.com", ...}) = 0
> brk(0)                                  = 0x508000
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
> 0) = 0x2aaaaaac0000
> open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or directory)
> open("/etc/ld.so.cache", O_RDONLY)      = 3
> fstat(3, {st_mode=S_IFREG|0644, st_size=89977, ...}) = 0
> mmap(NULL, 89977, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2aaaaaac1000
> close(3)                                = 0
> open("/usr/lib64/libevent.so.0", O_RDONLY) = 3
> read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300)\0\0"..., 640) = 640
> fstat(3, {st_mode=S_IFREG|0755, st_size=31872, ...}) = 0
> mmap(NULL, 1079224, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x2aaaaabc1000
> mprotect(0x2aaaaabc9000, 1046456, PROT_NONE) = 0
> mmap(0x2aaaaacc8000, 4096, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED, 3, 0x7000) = 0x2aaaaacc8000
> close(3)                                = 0
> open("/lib64/tls/libc.so.6", O_RDONLY)  = 3
> read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\322"..., 640) = 640
> fstat(3, {st_mode=S_IFREG|0755, st_size=1669760, ...}) = 0
> mmap(NULL, 2376104, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x2aaaaacc9000
> mprotect(0x2aaaaae05000, 1081768, PROT_NONE) = 0
> mmap(0x2aaaaaf04000, 20480, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED, 3, 0x13b000) = 0x2aaaaaf04000
> mmap(0x2aaaaaf09000, 16808, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aaaaaf09000
> close(3)                                = 0
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
> 0) = 0x2aaaaaf0e000
> arch_prctl(ARCH_SET_FS, 0x2aaaaaf0e720) = 0
> munmap(0x2aaaaaac1000, 89977)           = 0
> getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
> setrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
> socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3
> fcntl(3, F_GETFL)                       = 0x2 (flags O_RDWR)
> fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
> setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [30064771073], 4) = 0
> setsockopt(3, SOL_SOCKET, SO_KEEPALIVE, [30064771073], 4) = 0
> setsockopt(3, SOL_SOCKET, SO_LINGER, {onoff=0, linger=0}, 8) = 0
> bind(3, {sa_family=AF_INET, sin_port=htons(11211),
> sin_addr=inet_addr("127.0.0.1")}, 16) = 0
> listen(3, 1024)                         = 0
> getuid()                                = 0
> brk(0)                                  = 0x508000
> brk(0x529000)                           = 0x529000
> brk(0)                                  = 0x529000
> socket(PF_FILE, SOCK_STREAM, 0)         = 4
> connect(4, {sa_family=AF_FILE, path="/var/run/.nscd_socket"}, 110) =
> -1 ENOENT (No such file or directory)
> close(4)                                = 0
> open("/etc/nsswitch.conf", O_RDONLY)    = 4
> fstat(4, {st_mode=S_IFREG|0644, st_size=1686, ...}) = 0
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
> 0) = 0x2aaaaaac1000
> read(4, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1686
> read(4, "", 4096)                       = 0
> close(4)                                = 0
> munmap(0x2aaaaaac1000, 4096)            = 0
> open("/etc/ld.so.cache", O_RDONLY)      = 4
> fstat(4, {st_mode=S_IFREG|0644, st_size=89977, ...}) = 0
> mmap(NULL, 89977, PROT_READ, MAP_PRIVATE, 4, 0) = 0x2aaaaaac1000
> close(4)                                = 0
> open("/lib64/libnss_files.so.2", O_RDONLY) = 4
> read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200%\0\0"..., 640) = 640
> fstat(4, {st_mode=S_IFREG|0755, st_size=59376, ...}) = 0
> mmap(NULL, 1096328, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x2aaaaaf0f000
> mprotect(0x2aaaaaf1b000, 1047176, PROT_NONE) = 0
> mmap(0x2aaaab01a000, 4096, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED, 4, 0xb000) = 0x2aaaab01a000
> close(4)                                = 0
> munmap(0x2aaaaaac1000, 89977)           = 0
> open("/etc/passwd", O_RDONLY)           = 4
> fcntl(4, F_GETFD)                       = 0
> fcntl(4, F_SETFD, FD_CLOEXEC)           = 0
> fstat(4, {st_mode=S_IFREG|0644, st_size=2118, ...}) = 0
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
> 0) = 0x2aaaaaac1000
> read(4, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 2118
> close(4)                                = 0
> munmap(0x2aaaaaac1000, 4096)            = 0
> setgid(99)                              = 0
> setuid(99)                              = 0
> getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
> epoll_create(1024)                      = 4
> fcntl(4, F_SETFD, FD_CLOEXEC)           = 0
> socketpair(PF_FILE, SOCK_STREAM, 0, [5, 6]) = 0
> fcntl(5, F_SETFD, FD_CLOEXEC)           = 0
> fcntl(6, F_SETFD, FD_CLOEXEC)           = 0
> mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
> -1, 0) = 0x2aaaab01b000
> rt_sigaction(SIGPIPE, {SIG_IGN}, NULL, 8) = 0
> epoll_ctl_old(0x4, 0x1, 0x3, 0x7fffff8970a0) = -1 ENOSYS (Function not
> implemented)
> write(2, "failed to create listening conne"..., 37failed to create
> listening connection) = 37
> exit_group(1)                           = ?
>
>
> --
> Jonathan Chong
>
> http://www.arsenal-now.com/
> http://www.arsenal-mania.com/
> http://www.ashburrn.com/
> http://www.jonathan-chong.com/
>
>


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