ID: 43098
User updated by: harvie at email dot cz
Reported By: harvie at email dot cz
Status: Open
Bug Type: Reproducible crash
Operating System: Linux (Debian Etch) - php5-cli
PHP Version: 5.2.4
New Comment:
I have runned the script with strace debuger (This is debuging
interpreter calls, not PHP code... of course.), if you are interested:
# strace ./bugshow.php
execve("./emails.php", ["./emails.php"], [/* 29 vars */]) = 0
uname({sys="Linux", node="harvie-ntb", ...}) = 0
brk(0) = 0x854c000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7fa8000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=67381, ...}) = 0
mmap2(NULL, 67381, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f97000
close(3) = 0
...Lot of irrelevant stuff...
connect(3, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.2.1")}, 28) = 0
fcntl64(3, F_GETFL) = 0x2 (flags O_RDWR)
fcntl64(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
gettimeofday({1193256681, 718238}, NULL) = 0
poll([{fd=3, events=POLLOUT, revents=POLLOUT}], 1, 0) = 1
send(3, "\6?\1\0\0\1\0\0\0\0\0\0\1w\10moreover\3com\0\0\1\0\1", 32, 0)
= 32
poll([{fd=3, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
ioctl(3, FIONREAD, [56]) = 0
recvfrom(3,
"\6?\201\200\0\1\0\1\0\0\0\0\1w\10moreover\3com\0\0\1\0"..., 1024, 0,
{sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.2.1")}, [16]) = 56
close(3) = 0
gettimeofday({1193256681, 768001}, NULL) = 0
socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3
fcntl64(3, F_GETFL) = 0x2 (flags O_RDWR)
fcntl64(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(3, {sa_family=AF_INET, sin_port=htons(80),
sin_addr=inet_addr("170.224.8.50")}, 16) = -1 EINPROGRESS (Operation now
in progress)
poll([{fd=3, events=POLLIN|POLLOUT|POLLERR|POLLHUP, revents=POLLOUT}],
1, 1000) = 1
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
fcntl64(3, F_SETFL, O_RDWR) = 0
send(3, "GET / HTTP/1.0\r\n", 16, 0) = 16
send(3, "Host: w.moreover.com\r\n", 22, 0) = 22
send(3, "\r\n", 2, 0) = 2
poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 0) = 0
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP, revents=POLLIN}], 1, 1000)
= 1
recv(3, "HTTP/1.1 200 OK\r\nDate: Wed, 24 O"..., 8192, 0) = 524
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP, revents=POLLIN}], 1, 1000)
= 1
recv(3, "s, online news, current awarenes"..., 8192, 0) = 524
poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 0) = 0
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 1000) = 0
poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 0) = 0
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 1000) = 0
poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 0) = 0
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 1000) = 0
poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 0) = 0
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 1000) = 0
poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 0) = 0
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 1000) = 0
poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 0) = 0
...This is repeating few times a second...
Previous Comments:
------------------------------------------------------------------------
[2007-10-24 18:00:48] harvie at email dot cz
Description:
------------
I have writed spider/crawler to make some web search engine as school
project.
So... I have small problem:
I am using file_get_contents() (i've tryed fopen() too...).
Crawler works 100% great, but sometimes it freezing. I have tryed to
trace what function freezes, and i found it, it's
file_get_contents()...
So, i googled and found default_socket_timeout setting, i set it to 1,
but sometimes its freezes and never get up again.
I've done this example, so you can see, that it freezes after few
iterations. I have supplyed URL, that causes freeze of my crawler (im
not sure why...):
Reproduce code:
---------------
#!/usr/bin/php
< ?php
/*Run and wait for a while, this can totaly stop the script at the dead
point...*/
ini_set('default_socket_timeout',1);
set_time_limit(0);
//$url='http://ad.doubleclick.net/click';
$url='http://w.moreover.com/';
while(1) {
@file_get_contents($url, false, null, 0, 10000);
echo "#";
}
?>
Expected result:
----------------
I will download file from specified URL few times, and after that it
will freeze and never be better...
(It works if you are using different url each time too, but it takes
more time...)
Actual result:
--------------
harvie-ntb:/home/harvie/Desktop/crawler# ./bugshow.php
#1#2#3#4#5#6#7#8#9#10#11#12#13#14#15#16#17
And in there it freezes for eternity (i thought, that this will
continue after 1 second if failed with
ini_set('default_socket_timeout',1);, But whole script stops, i tryed to
wait realy long long time...)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=43098&edit=1
