debugging bind9 debian (1:9.5.1.dfsg.P3-1+lenny1) hangs
Mike
mike at infogratis.org
Thu Jan 7 03:47:32 UTC 2010
Hi List,
not certain if this is the appropriate area for this request , so do let
me know.
I'm seeing system hangs with bind9 on a debian lenny box. They do clear
after a bit of wait
but do cause load spikes and the system becomes unresponsive.
In running strace I'm wondering if what I'm seeing in the strace output
are errors (No such file or directory) and (Resource temporarily
unavailable).
Can someone help me understand? Here is a snippet from the strace output:
19120 <... futex resumed> ) = 1
19120 epoll_ctl(8, EPOLL_CTL_DEL, 517, {EPOLLIN, {u32=517, u64=517}}) = 0
19120 epoll_wait(8, {{EPOLLIN, {u32=5, u64=13240600445115695109}}}, 64,
-1) = 1
19120 read(5, "\5\2\0\0\375\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 517, {EPOLLIN, {u32=517, u64=517}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 517, {EPOLLOUT, {u32=517, u64=517}}) =
-1 ENOENT (No such file or directory)
19120 read(5, "\5\2\0\0\373\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 517, {EPOLLIN, {u32=517, u64=517}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 517, {EPOLLOUT, {u32=517, u64=517}}) =
-1 ENOENT (No such file or directory)
19120 close(517) = 0
19120 read(5, 0xb64cb28c, 8) = -1 EAGAIN (Resource
temporarily unavailable)
19120 epoll_wait(8, {{EPOLLIN, {u32=520, u64=2233382994440}}}, 64, -1) = 1
19120 futex(0xb74d2048, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb74d2044,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1} <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d2010, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19120 <... futex resumed> ) = 1
19120 futex(0xb74d2010, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d2010, FUTEX_WAKE_PRIVATE, 1) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 futex(0xb5b5ac70, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19120 <... futex resumed> ) = 1
19120 futex(0xb5b5ac70, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 recvmsg(520, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("213.130.47.22")},
msg_iov(1)=[{"\345\23\204\20\0\1\0\1\0\5\0\v\5auth5\2ns\3gin\3ntt\3net"...,
4096}], msg_controllen=20, {cmsg_len=20, cmsg_level=SOL_SOCKET,
cmsg_type=0x1d /* SCM_??? */, ...}, msg_flags=0}, 0) = 402
19118 futex(0xb5b5ac70, FUTEX_WAKE_PRIVATE, 1) = 0
19118 recvmsg(520, 0xb74ccf54, 0) = -1 EAGAIN (Resource
temporarily unavailable)
19118 write(7, "\10\2\0\0\375\377\377\377"..., 8) = 8
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 futex(0xb8e61e90, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19120 <... futex resumed> ) = 1
19120 futex(0xb8e61e90, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb8e61e90, FUTEX_WAKE_PRIVATE, 1) = 0
19118 write(7, "\10\2\0\0\373\377\377\377"..., 8) = 8
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 gettimeofday({1262638342, 657830}, NULL) = 0
19118 futex(0xb74d2048, FUTEX_WAIT_PRIVATE, 85, NULL <unfinished ...>
19120 <... futex resumed> ) = 1
19120 epoll_ctl(8, EPOLL_CTL_DEL, 520, {EPOLLIN, {u32=520, u64=520}}) = 0
19120 epoll_wait(8, {{EPOLLIN, {u32=5, u64=13240600445115695109}}}, 64,
-1) = 1
19120 read(5, "\10\2\0\0\375\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 520, {EPOLLIN, {u32=520, u64=520}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 520, {EPOLLOUT, {u32=520, u64=520}}) =
-1 ENOENT (No such file or directory)
19120 read(5, "\10\2\0\0\373\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 520, {EPOLLIN, {u32=520, u64=520}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 520, {EPOLLOUT, {u32=520, u64=520}}) =
-1 ENOENT (No such file or directory)
19120 close(520) = 0
19120 read(5, 0xb64cb28c, 8) = -1 EAGAIN (Resource
temporarily unavailable)
19120 epoll_wait(8, <unfinished ...>
19119 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed
out)
19119 gettimeofday({1262638342, 857733}, NULL) = 0
19119 futex(0xb74d2048, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb74d2044,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1} <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d2010, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19119 <... futex resumed> ) = 1
19119 futex(0xb74d2010, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d2010, FUTEX_WAKE_PRIVATE, 1) = 0
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 futex(0xb74d4010, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19119 <... futex resumed> ) = 1
19119 futex(0xb74d4010, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d4040, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19119 <... futex resumed> ) = 1
19119 clock_gettime(CLOCK_REALTIME, {1262638342, 857733237}) = 0
19119 futex(0xb74d4040, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d4044, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb74d4040,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 0
19118 futex(0xb74d4010, FUTEX_WAKE_PRIVATE, 1) = 0
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74cc958, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP) = 6
19118 fcntl64(6, F_DUPFD, 512) = 515
19118 close(6) = 0
19118 fcntl64(515, F_GETFL) = 0x2 (flags O_RDWR)
19118 fcntl64(515, F_SETFL, O_RDWR|O_NONBLOCK) = 0
19118 setsockopt(515, SOL_SOCKET, SO_TIMESTAMP, [1], 4) = 0
19118 setsockopt(515, SOL_IPV6, 0x31 /* IPV6_??? */, [1], 4) = 0
19118 getsockopt(515, SOL_SOCKET, SO_RCVBUF, [111616], [4]) = 0
19118 setsockopt(515, SOL_IPV6, IPV6_V6ONLY, [1], 4) = 0
19118 bind(515, {sa_family=AF_INET6, sin6_port=htons(31050),
inet_pton(AF_INET6, "::", &sin6_addr), sin6_flowinfo=0,
sin6_scope_id=0}, 28) = 0
19118 recvmsg(515, 0xb74ccd64, 0) = -1 EAGAIN (Resource
temporarily unavailable)
19118 write(7, "\3\2\0\0\375\377\377\377"..., 8) = 8
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 sendmsg(515, {msg_name(28)={sa_family=AF_INET6,
sin6_port=htons(53), inet_pton(AF_INET6, "2001:418:3f4::5", &sin6_addr),
sin6_flowinfo=0, sin6_scope_id=0},
msg_iov(1)=[{"\252B$\0\0\1\0\1\0\0\0\0\ninfogratis\3org\0\0\6\0\1\300"...,
77}], msg_controllen=0, msg_flags=0}, 0) = -1 ENETUNREACH (Network is
unreachable)
19118 socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 6
19118 fcntl64(6, F_DUPFD, 512) = 516
19118 close(6) = 0
19118 fcntl64(516, F_GETFL) = 0x2 (flags O_RDWR)
19118 fcntl64(516, F_SETFL, O_RDWR|O_NONBLOCK) = 0
19118 setsockopt(516, SOL_SOCKET, SO_TIMESTAMP, [1], 4) = 0
19118 setsockopt(516, SOL_IP, IP_MTU_DISCOVER, [0], 4) = 0
19118 getsockopt(516, SOL_SOCKET, SO_RCVBUF, [111616], [4]) = 0
19118 bind(516, {sa_family=AF_INET, sin_port=htons(62848),
sin_addr=inet_addr("0.0.0.0")}, 16) = 0
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 read(9, 0xb74ccc68, 40) = -1 EAGAIN (Resource
temporarily unavailable)
19118 recvmsg(516, 0xb74ccd64, 0) = -1 EAGAIN (Resource
temporarily unavailable)
19118 write(7, "\4\2\0\0\375\377\377\377"..., 8) = 8
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 sendmsg(516, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("66.252.5.14")},
msg_iov(1)=[{"=\310$\0\0\1\0\1\0\0\0\0\ninfogratis\3org\0\0\6\0\1\300"...,
77}], msg_controllen=0, msg_flags=0}, 0) = 77
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 write(7, "\3\2\0\0\373\377\377\377"..., 8) = 8
19118 gettimeofday({1262638342, 857733}, NULL) = 0
19118 futex(0xb74d2048, FUTEX_WAIT_PRIVATE, 87, NULL <unfinished ...>
19119 <... futex resumed> ) = 1
19119 futex(0xb74d4044, FUTEX_WAIT_PRIVATE, 147, {0, 499999763}) = -1
EAGAIN (Resource temporarily unavailable)
19119 gettimeofday({1262638342, 857733}, NULL) = 0
19119 futex(0xb74d4010, FUTEX_WAKE_PRIVATE, 1) = 0
19119 clock_gettime(CLOCK_REALTIME, {1262638342, 857733237}) = 0
19119 futex(0xb74d4044, FUTEX_WAIT_PRIVATE, 149, {14, 999999763}
<unfinished ...>
19120 <... epoll_wait resumed> {{EPOLLIN, {u32=5,
u64=13240600445115695109}}}, 64, -1) = 1
19120 read(5, "\3\2\0\0\375\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 515, {EPOLLIN, {u32=515, u64=515}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 515, {EPOLLOUT, {u32=515, u64=515}}) =
-1 ENOENT (No such file or directory)
19120 read(5, "\4\2\0\0\375\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_ADD, 516, {EPOLLIN, {u32=516,
u64=2216203125252}}) = 0
19120 read(5, "\3\2\0\0\373\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 515, {EPOLLIN, {u32=515, u64=515}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 515, {EPOLLOUT, {u32=515, u64=515}}) =
-1 ENOENT (No such file or directory)
19120 close(515) = 0
19120 read(5, 0xb64cb28c, 8) = -1 EAGAIN (Resource
temporarily unavailable)
19120 epoll_wait(8, {{EPOLLIN, {u32=516, u64=2216203125252}}}, 64, -1) = 1
19120 futex(0xb74d2048, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb74d2044,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1} <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d2010, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19120 <... futex resumed> ) = 1
19120 futex(0xb74d2010, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb74d2010, FUTEX_WAKE_PRIVATE, 1) = 0
19118 gettimeofday({1262638342, 945690}, NULL) = 0
19118 futex(0xb5b63430, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19120 <... futex resumed> ) = 1
19120 futex(0xb5b63430, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 recvmsg(516, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("66.252.5.14")},
msg_iov(1)=[{"=\310\244\0\0\1\0\0\0\0\0\0\ninfogratis\3org\0\0\6\0\1\276"...,
4096}], msg_controllen=20, {cmsg_len=20, cmsg_level=SOL_SOCKET,
cmsg_type=0x1d /* SCM_??? */, ...}, msg_flags=0}, 0) = 32
19118 futex(0xb5b63430, FUTEX_WAKE_PRIVATE, 1) = 0
19118 recvmsg(516, 0xb74ccf54, 0) = -1 EAGAIN (Resource
temporarily unavailable)
19118 write(7, "\4\2\0\0\375\377\377\377"..., 8) = 8
19118 gettimeofday({1262638342, 945690}, NULL) = 0
19118 futex(0xb74d4044, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb74d4040,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
19118 gettimeofday({1262638342, 945690}, NULL) = 0
19118 futex(0xb8e61e30, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...>
19119 <... futex resumed> ) = 0
19119 gettimeofday({1262638342, 945690}, NULL) = 0
19119 futex(0xb74d4010, FUTEX_WAKE_PRIVATE, 1) = 0
19119 clock_gettime(CLOCK_REALTIME, {1262638342, 945690526}) = 0
19119 futex(0xb74d4044, FUTEX_WAIT_PRIVATE, 151, {1199, 68451474}
<unfinished ...>
19120 <... futex resumed> ) = 1
19120 futex(0xb8e61e30, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
19118 <... futex resumed> ) = 0
19118 futex(0xb8e61e30, FUTEX_WAKE_PRIVATE, 1) = 0
19118 write(7, "\4\2\0\0\373\377\377\377"..., 8) = 8
19118 futex(0xb74d2048, FUTEX_WAIT_PRIVATE, 89, NULL <unfinished ...>
19120 <... futex resumed> ) = 1
19120 epoll_ctl(8, EPOLL_CTL_DEL, 516, {EPOLLIN, {u32=516, u64=516}}) = 0
19120 epoll_wait(8, {{EPOLLIN, {u32=5, u64=13240600445115695109}}}, 64,
-1) = 1
19120 read(5, "\4\2\0\0\375\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 516, {EPOLLIN, {u32=516, u64=516}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 516, {EPOLLOUT, {u32=516, u64=516}}) =
-1 ENOENT (No such file or directory)
19120 read(5, "\4\2\0\0\373\377\377\377"..., 8) = 8
19120 epoll_ctl(8, EPOLL_CTL_DEL, 516, {EPOLLIN, {u32=516, u64=516}}) =
-1 ENOENT (No such file or directory)
19120 epoll_ctl(8, EPOLL_CTL_DEL, 516, {EPOLLOUT, {u32=516, u64=516}}) =
-1 ENOENT (No such file or directory)
19120 close(516) = 0
19120 read(5, 0xb64cb28c, 8) = -1 EAGAIN (Resource
temporarily unavailable)
19120 epoll_wait(8,
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