Hello,
I received a strange error when attempting ro dump a large repository:
"svnadmin dump REPO" results (repeatably) in a IOT/Abort trap error after
rev22615
"svnadmin dump --deltas REPO" repeatably yields a IOT/Abort trap error
after rev3142
The repository can be synced using svnsync however (in portions of 100
revisions, as svnsync seems to have a memory leak), and the revisions
following the
errors can be dumped with "svnadmin dump -r REV REPO".
The repo has ~140k revisions and is ~25GB in size.
OS is AIX 7.1, Subversion version is 1.6.17 with FSFS backend built from
source, the
repository version is 4 (1.4).
Using a 1.6 repo format yields similar results - the number of
revisions that can be dumped is increased, and the gdb output less
informative:
(gdb) backtrace
#0 0xd01111bc in extend_brk () from /usr/lib/libc.a(shr.o)
(gdb)
The backtrace from "svnadmin dump --deltas REPO" is:
(gdb) backtrace
#0 0xd0517440 in pthread_kill () from /usr/lib/libpthread.a(shr_xpg5.o)
#1 0xd05168e8 in _p_raise () from /usr/lib/libpthread.a(shr_xpg5.o)
#2 0xd0120e24 in raise () from /usr/lib/libc.a(shr.o)
#3 0xd016cde8 in abort () from /usr/lib/libc.a(shr.o)
#4 0xd364b628 in abort_on_pool_failure (retcode=12) at
subversion/libsvn_subr/pool.c:49
#5 0xd2873ed8 in apr_palloc (pool=0x2c0c5c50, in_size=204800)
at memory/unix/apr_pools.c:693
#6 0xd2a0915c in svn_txdelta (stream=0x2ff22240, source=
#7 0xd3783248 in svn_fs_fs__get_file_delta_stream (stream_p=0x2ff22240,
fs=0x2001eb88,
source=0x2b30d700, target=0x2b30d9b0, pool=0x2c0c5c50)
at subversion/libsvn_fs_fs/fs_fs.c:3405
#8 0xd377a4bc in svn_fs_fs__dag_get_file_delta_stream
(stream_p=0x2ff22240,
source=0x2b30d678, target=0x2b30d928, pool=0x2c0c5c50)
at subversion/libsvn_fs_fs/dag.c:930
Looking at the sourcecode, this seems to suggest that svnadmin dump cannot
allocate
memory - however, at the time of the error, the process is only ~225M, and
there's
plenty of free memory available on the machine (equipped with 4GB, ~3,5GB
free).
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
svn 10813640 20.0 5.0 226824 226920 pts/1 A 15:23:37 2:23
svnadmin dump
There's no limits on processes/memory set on the machine:
@> ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
max memory size (kbytes, -m) unlimited
open files (-n) unlimited
pipe size (512 bytes, -p) 64
stack size (kbytes, -s) hard
cpu time (seconds, -t) unlimited
max user processes (-u) 5000
virtual memory (kbytes, -v) unlimited
Has anybody experienced a similar error?
Any hints?
Best regards,
Martin
