Re: git-commit fatal: Out of memory? mmap failed: Bad file descriptor

From: Brandon Casey <casey@nrlssc.navy.mil>
Date: Jan 15, 2008, 17:26 UTC
Message-ID: <478CECAB.2030906@nrlssc.navy.mil>
In-Reply-To: <alpine.LFD.1.00.0801142140560.2806@woody.linux-foundation.org>

Linus Torvalds wrote:

Show 10 quoted lines

> 
> On Mon, 14 Jan 2008, Brandon Casey wrote:
>> To reiterate, I only have problems with the builtin-commit,
>> i.e. 1.5.4.*, the 1.5.3.* series works correctly. Of course
>> if this is a memory corruption issue, then it could just be
>> that the pattern of memory accesses in 1.5.3 does not tweak
>> the problem.
> 
> Can you do an strace of the failure case and put it up on some public 
> place (it's likely going to be too big to send as email)?

I did the strace. Below is the last screenful of lines.

Do you have a suggestion for a public place to upload? I do not have one of my own, and I've never used any of the 'free' services. The strace log is about 8.5MB, compressed to about 500K.

$ git --version git version 1.5.4.rc3.11.g4e67

Not that it's important, but looks like the file descriptor that is closed too soon is 3. I got 6 when running under gdb. This is also using the latest version of git. The results are the same with either version (including the fd#) so I just used this one.

Junio C Hamano wrote:

> What platform is this on?

$ cat /etc/redhat-release CentOS release 4.5 (Final)

i686

> Does it reliably reproduce for any commit in the repository, or
> reliably reproduce for one particular commit, or sometimes
> reprooduce for one particular commit?

Reliably for one particular commit.

Additional commits on top of this commit complete successfully.

If this commit is amended without error by amending with '-C HEAD' or by using a 1.5.3 version, then additional amends or commits will not produce the error.

-brandon

16170 mmap2(NULL, 417, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb1699000 16170 close(3) = 0 16170 munmap(0xb1699000, 417) = 0 16170 stat64("/home/casey/auto_v3.5/src_temp2/.git/objects/67/981a61208756cf4973 7ec065e7bc0d7ff1a89d", {st_mode=S_IFREG|0444, st_size=417, ...}) = 0 16170 open("/home/casey/auto_v3.5/src_temp2/.git/objects/67/981a61208756cf49737e c065e7bc0d7ff1a89d", O_RDONLY|O_LARGEFILE) = 3 16170 mmap2(NULL, 417, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb1699000 16170 close(3) = 0 16170 munmap(0xb1699000, 417) = 0 16170 stat64("/home/casey/auto_v3.5/src_temp2/.git/objects/4e/7c1178482f4b3c52e8 afce15db3bc8419530d2", {st_mode=S_IFREG|0444, st_size=417, ...}) = 0 16170 open("/home/casey/auto_v3.5/src_temp2/.git/objects/4e/7c1178482f4b3c52e8af ce15db3bc8419530d2", O_RDONLY|O_LARGEFILE) = 3 16170 mmap2(NULL, 417, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb1699000 16170 close(3) = 0 16170 munmap(0xb1699000, 417) = 0 16170 stat64("/home/casey/auto_v3.5/src_temp2/.git/objects/02/3777b3c0e5f7697deb 2ce738c6b38b1ec2b17c", {st_mode=S_IFREG|0444, st_size=417, ...}) = 0 16170 open("/home/casey/auto_v3.5/src_temp2/.git/objects/02/3777b3c0e5f7697deb2c e738c6b38b1ec2b17c", O_RDONLY|O_LARGEFILE) = 3 16170 mmap2(NULL, 417, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb1699000 16170 close(3) = 0 16170 munmap(0xb1699000, 417) = 0 16170 mmap2(NULL, 996168, PROT_READ, MAP_PRIVATE, 3, 0) = -1 EBADF (Bad file des criptor) 16170 munmap(0xb56bd000, 33554432) = 0 16170 mmap2(NULL, 996168, PROT_READ, MAP_PRIVATE, 3, 0) = -1 EBADF (Bad file des criptor) 16170 write(2, "fatal: Out of memory? mmap faile"..., 55) = 55 16170 write(1, "Created commit ", 15) = 15 16170 exit_group(128) = ?