From:
Operating system: Linux
PHP version: 5.2.17
Package: HTTP related
Bug Type: Bug
Bug description:occasionally dead loop in php_stream_url_wrap_http_ex
Description:
------------
I am writing a php script running in crontab to read pages from many other
sites. Sometimes the script eats 100% CPU and get into a dead loop. This
problem occurs randomly, no dependence on special remote web servers.
It seems that the problem is in
php5-5.2.17/ext/standard/http_fopen_wrapper.c around line 614.
When gdb is attached to the dead loop php process, the stack trace looks
like:
(the url differs everytime, so I think the remote web servers are not
related to this problem)
(gdb) bt
#0 0x0809ff78 in __i686.get_pc_thunk.bx ()
#1 0x082c4f11 in _php_stream_get_line (stream=0xcb512c4, buf=0xcb9536c
"Date: Tue, 25 Jan 2011 ", maxlen=<error type>,
returned_len=0xbfffa428) at
/usr/src/php5/source/php5-5.2.17/main/streams/streams.c:743
#2 0x08277084 in php_stream_url_wrap_http_ex (wrapper=0x85d06c8,
path=0x8879f9c "http://www.xxxxxxxxx.com/xxxxxxxx.php";,
mode=0x83c467f "rb", options=4, opened_path=0x0, context=0xcb4e290,
redirect_max=20, flags=1)
at
/usr/src/php5/source/php5-5.2.17/ext/standard/http_fopen_wrapper.c:614
#3 0x08279120 in php_stream_url_wrap_http (wrapper=0x85d06c8,
path=0x8879f9c "http://www.xxxxxxxxxxxxx.com/xxxxxxx.php";,
mode=0x83c467f "rb", options=4, opened_path=0x0, context=0xcb4e290)
at
/usr/src/php5/source/php5-5.2.17/ext/standard/http_fopen_wrapper.c:782
#4 0x082c450f in _php_stream_open_wrapper_ex (path=0x8879f9c
"http://www.xxxxxxxxx.com/xxxxxxxxx.php";,
mode=0x83c467f "rb", options=12, opened_path=0x0, context=0xcb4e290)
at /usr/src/php5/source/php5-5.2.17/main/streams/streams.c:1827
#5 0x08233513 in zif_file_get_contents (ht=3, return_value=0xcb81008,
return_value_ptr=0x0, this_ptr=0x0,
return_value_used=1) at
/usr/src/php5/source/php5-5.2.17/ext/standard/file.c:541
#6 0x08332b8b in zend_do_fcall_common_helper_SPEC
(execute_data=0xbfffb32c)
at /usr/src/php5/source/php5-5.2.17/Zend/zend_vm_execute.h:200
#7 0x0831ce30 in execute (op_array=0x87cb954) at
/usr/src/php5/source/php5-5.2.17/Zend/zend_vm_execute.h:92
#8 0x0833244e in zend_do_fcall_common_helper_SPEC
(execute_data=0xbfffb80c)
at /usr/src/php5/source/php5-5.2.17/Zend/zend_vm_execute.h:234
#9 0x0831ce30 in execute (op_array=0x87cafd8) at
/usr/src/php5/source/php5-5.2.17/Zend/zend_vm_execute.h:92
#10 0x0833244e in zend_do_fcall_common_helper_SPEC
(execute_data=0xbfffc0dc)
at /usr/src/php5/source/php5-5.2.17/Zend/zend_vm_execute.h:234
#11 0x0831ce30 in execute (op_array=0x8713608) at
/usr/src/php5/source/php5-5.2.17/Zend/zend_vm_execute.h:92
#12 0x082f7530 in zend_execute_scripts (type=8, retval=0x0, file_count=3)
at /usr/src/php5/source/php5-5.2.17/Zend/zend.c:1215
#13 0x082ac92f in php_execute_script (primary_file=0xbfffe4dc) at
/usr/src/php5/source/php5-5.2.17/main/main.c:2058
#14 0x0837d573 in main (argc=2, argv=0xbfffe5c4) at
/usr/src/php5/source/php5-5.2.17/sapi/cli/php_cli.c:1171
--
Edit bug report at http://bugs.php.net/bug.php?id=53841&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53841&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53841&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53841&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53841&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53841&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53841&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53841&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53841&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53841&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53841&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53841&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53841&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53841&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53841&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53841&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53841&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53841&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53841&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53841&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53841&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53841&r=mysqlcfg
