Hi Dale
Thanks for the thoughts - I really appreciate you looking at this. 'strace'
was a great suggestion and new discovery for me. I can't say I am sure how
to analyse the output yet, but at least I am able to identify which file it
is trying to write to when it falls over. I made another discovery whilst
doing this - we are running mod_perl and I am starting to get the
impression mod_perl is the underlying cause of the problem (caching
variables somehow). I suspect this because I am now running a test script
which basically just executes the one line:
cd /var/www/test_repo; strace git commit -m 'msg' 2>&1
If I restart apache, the first time it works (it performs the commit).
However, on the second (third, fourth..) run, it gives the 'unable to
create temporary file...' error. Also, if I run it under cgi it works every
time (unfortunately we cant just move everything over to cgi though).
I wont post the full output as it is very long - and am just posting this
on the off chance it instantly means something to you (doesnt mean much to
me yet, but I will investigate!). So when it fails it starts
execve("/usr/bin/git", ["git", "commit", "-m", "msg"], [/* 16 vars */]) = 0
brk(0) = 0x26ee000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f26e51ae000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 0
fstat(0, {st_mode=S_IFREG|0644, st_size=32187, ...}) = 0
mmap(NULL, 32187, PROT_READ, MAP_PRIVATE, 0, 0) = 0x7f26e51a6000
close(0) = 0
open("/lib64/libz.so.1", O_RDONLY) = 0
read(0, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 !\0\0\0\0\0\0"...,
832) = 832
fstat(0, {st_mode=S_IFREG|0755, st_size=88600, ...}) = 0
</code>
I dont know if this is significantly different from when it succeeds (first
run):
execve("/usr/bin/git", ["git", "commit", "-m", "msg"], [/* 16 vars */]) = 0
brk(0) = 0x1daf000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f9b43975000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=32187, ...}) = 0
mmap(NULL, 32187, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9b4396d000
close(3) = 0
open("/lib64/libz.so.1", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 !\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=88600, ...}) = 0
or in CGI:
execve("/usr/bin/git", ["git", "commit", "-m", "msg"], [/* 29 vars */]) = 0
brk(0) = 0x935000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f9969bd7000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=32187, ...}) = 0
mmap(NULL, 32187, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9969bcf000
close(3) = 0
open("/lib64/libz.so.1", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 !\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=88600, ...}) = 0
Below are the last few lines of the strace before it falls over:
close(0) = 0
open(".git/objects/info/alternates", O_RDONLY|O_NOATIME) = -1 ENOENT (No
such file or directory)
access(".git/objects/99/564f15c5a06c44e372d03489c59a32ebcf9ec9", F_OK) = 0
access(".git/hooks/prepare-commit-msg", X_OK) = -1 ENOENT (No such file or
directory)
access(".git/hooks/commit-msg", X_OK) = -1 ENOENT (No such file or
directory)
open(".git/COMMIT_EDITMSG", O_RDONLY) = 0
read(0, "msg\n", 8192) = 4
read(0, "", 12308) = 0
close(0) = 0
open(".git/objects/99/564f15c5a06c44e372d03489c59a32ebcf9ec9",
O_RDONLY|O_NOATIME) = 0
fstat(0, {st_mode=S_IFREG|0444, st_size=52, ...}) = 0
mmap(NULL, 52, PROT_READ, MAP_PRIVATE, 0, 0) = 0x7f26e51ad000
close(0) = 0
munmap(0x7f26e51ad000, 52) = 0
access(".git/objects/f8/8d4f7df95a7c0b3842bf98533e01472efab496", F_OK) =
-1 ENOENT (No such file or directory)
open(".git/objects/f8/tmp_obj_pW5OIL", O_RDWR|O_CREAT|O_EXCL, 0444) = -1
ENOENT (No such file or directory)
mkdir(".git/objects/f8", 0777) = 0
open(".git/objects/f8/tmp_obj_pkqRHL", O_RDWR|O_CREAT|O_EXCL, 0444) = 0
write(2, "error: unable to create temporar"..., 66error: unable to create
temporary file: No such file or directory
) = 66
write(2, "fatal: failed to write commit ob"..., 37fatal: failed to write
commit object
) = 37
exit_group(128) = ?
When it succeeds on the first run, it appears to execute more commands
before arriving at what I guess is the same place,
which looks like:
close(3) = 0
munmap(0x7f9b43974000, 137) = 0
access(".git/objects/99/564f15c5a06c44e372d03489c59a32ebcf9ec9", F_OK) = 0
access(".git/hooks/prepare-commit-msg", X_OK) = -1 ENOENT (No such file or
directory)
access(".git/hooks/commit-msg", X_OK) = -1 ENOENT (No such file or
directory)
open(".git/COMMIT_EDITMSG", O_RDONLY) = 3
read(3, "msg\n", 8192) = 4
read(3, "", 12308) = 0
close(3) = 0
open(".git/objects/99/564f15c5a06c44e372d03489c59a32ebcf9ec9",
O_RDONLY|O_NOATIME) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=52, ...}) = 0
mmap(NULL, 52, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9b43974000
close(3) = 0
munmap(0x7f9b43974000, 52) = 0
access(".git/objects/0f/7f57fee43d1fa25cfc7f0d7fd1bf5826b22fcc", F_OK) =
-1 ENOENT (No such file or directory)
open(".git/objects/0f/tmp_obj_RAN8sj", O_RDWR|O_CREAT|O_EXCL, 0444) = -1
ENOENT (No such file or directory)
mkdir(".git/objects/0f", 0777) = 0
open(".git/objects/0f/tmp_obj_rnREwj", O_RDWR|O_CREAT|O_EXCL, 0444) = 3
brk(0x1df9000) = 0x1df9000
write(3,
"x\1\255\216I\n\3030\f\0{\366+\374\201\4/R\22A(\355STUY\16\216C\354\26\372"...,
138) = 138
brk(0x1de9000) = 0x1de9000
brk(0x1dd9000) = 0x1dd9000
brk(0x1dd7000) = 0x1dd7000
... and then continues
Many thanks for your help so far!
Tom
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