node.js写的程序。进程似乎没有在运行，卡住了！下面是strace 命令的信息

Question

用node.js做的抓取，进程不运行了。

[root@localhost test]# strace -p 8926
Process 8926 attached - interrupt to quit
clock_gettime(CLOCK_MONOTONIC, {75769, 817366105}) = 0
epoll_wait(3, {{EPOLLIN, {u32=8, u64=6751688589320}}}, 64, 2147483648) = 1
read(8, "", 65536)                      = 0
futex(0xcf4a5f8, FUTEX_WAKE_PRIVATE, 1) = 1
close(8)                                = 0
write(1, "Re-connecting lost connection: E"..., 337) = 337
socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 8
ioctl(8, FIONBIO, [1])                  = 0
fcntl(8, F_SETFD, FD_CLOEXEC)           = 0
setsockopt(8, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
connect(8, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("192.168.1.30")}, 16) = -1 EINPROGRESS (Operation now in progress)
clock_gettime(CLOCK_MONOTONIC, {75851, 180664105}) = 0
epoll_ctl(3, EPOLL_CTL_MOD, 8, {EPOLLOUT, {u32=8, u64=6755983556616}}) = -1 ENOENT (No such file or directory)
epoll_ctl(3, EPOLL_CTL_ADD, 8, {EPOLLOUT, {u32=8, u64=6755983556616}}) = 0
epoll_wait(3, {{EPOLLOUT, {u32=8, u64=6755983556616}}}, 64, 2147483648) = 1
getsockopt(8, SOL_SOCKET, SO_ERROR, [8589934592], [4]) = 0
clock_gettime(CLOCK_MONOTONIC, {75851, 180953105}) = 0
epoll_ctl(3, EPOLL_CTL_MOD, 8, {EPOLLIN|EPOLLOUT, {u32=8, u64=6760278523912}}) = 0
epoll_wait(3, {{EPOLLIN|EPOLLOUT, {u32=8, u64=6760278523912}}}, 64, 5000) = 1
read(8, ":n5.5.3-m3-logv9<I9">PVA377"..., 65536) = 62
write(8, ";13173632!"..., 63) = 63
clock_gettime(CLOCK_MONOTONIC, {75851, 181554105}) = 0
epoll_ctl(3, EPOLL_CTL_MOD, 8, {EPOLLIN, {u32=8, u64=6764573491208}}) = 0
epoll_wait(3, {{EPOLLIN, {u32=8, u64=6764573491208}}}, 64, 4999) = 1
read(8, "722", 65536) = 11
clock_gettime(CLOCK_MONOTONIC, {75851, 181863105}) = 0
epoll_wait(3, {}, 64, 4999)             = 0
clock_gettime(CLOCK_MONOTONIC, {75856, 180559105}) = 0
epoll_wait(3, {{EPOLLIN, {u32=8, u64=6764573491208}}}, 64, 2147483648) = 1
read(8, "", 65536)                      = 0
futex(0xcf4a5f8, FUTEX_WAKE_PRIVATE, 1) = 1
close(8)                                = 0
write(1, "Re-connecting lost connection: E"..., 337) = 337
socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 8
ioctl(8, FIONBIO, [1])                  = 0
fcntl(8, F_SETFD, FD_CLOEXEC)           = 0

read(8, ":n5.5.3-m3-logv9<I9">PVA377"..., 65536) = 62

这个段我怎么感觉像是跟数据库有关？可我没有操作mysql

Answer 1

同时批量抓取2000个网址。 这样的进程有10来个，很多请求都终都超时了。，进程会一直卡在epoll_wait(3, 这里

Answer 2

你用什么来设置抓取的时间间隔

Answer 3

可能跟ulimit 有关，现在有些进程会等待 epoll_wait(3,

Answer 4

不贴代码谁知道你想干嘛