https://bugzilla.wikimedia.org/show_bug.cgi?id=17203
Summary: Loading/opening large images the server hangs
Product: MediaWiki
Version: 1.13.0
Platform: HP
OS/Version: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: Images
AssignedTo: [email protected]
ReportedBy: [email protected]
In php.ini upload_max_filesize = 64M, the image is ~1.3M,
$wgMaxShellMemory and $wgMaxShellFileSize are at their
default value of 102400. Then the call to ImageMagick
is done through wfShellExec, which runs bin/ulimit4.sh.
This is probably an ImageMagick or, possibly, libgc1c2,
according to the following bug reports
https://bugzilla.redhat.com/show_bug.cgi?id=446929
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=380727
As the convert executable hangs on a futex/wait, the cpu
time required to trigger the given ulimit is never reached.
Larger values for $wgMaxShellMemory and $wgMaxShellFileSize
will work.
Version: ImageMagick 6.2.4 02/10/07 Q16 http://www.imagemagick.org
ii libgc1c2 6.8-1 conservative garbage
collector for C and C++
The following is the final part of stracing convert with debug
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
write(1, "17:06:18 0:02 0.090u 6.2.4 Trace"..., 9317:06:18 0:02 0.090u 6.2.4
Trace convert[26928]: hashmap.c/AppendValueToLinkedList/164/Trace
) = 93
write(1, " ...\n", 6 ...
) = 6
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
brk(0x75a000) = 0x738000
mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
brk(0x75a000) = 0x738000
mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
brk(0x75b000) = 0x738000
mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
times({tms_utime=5, tms_stime=4, tms_cutime=0, tms_cstime=0}) = 1865220765
brk(0x759000) = 0x738000
mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
-1 ENOMEM (Cannot allocate memory)
mmap(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap(NULL, 2097152, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
mmap(NULL, 1048576, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0)
= -1 ENOMEM (Cannot allocate memory)
futex(0x503150, FUTEX_WAIT, 2, NULL <unfinished ...>
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