I am unable to run the Subversion regression tests for BDB and DAV with
Apache 2.4 using the event MPM (the new default MPM in 2.4). Sometimes
mod_dav_svn SEGVs causing tests to FAIL and sometimes the tests hang
with mod_dav_svn spinning in a loop. The problems go away when I switch
to the worker MPM (the old default MPM in 2.2).
I'm not sure what the event MPM does that causes the problem. Here is a
typical SEGV:
#0 0x00007fb2017f8e96 in svn_error_clear (err=0x2031203920312038)
at ../src/subversion/libsvn_subr/error.c:341
341 while (err->child)
(gdb) p err
$1 = (svn_error_t *) 0x2031203920312038
(gdb) p err[0]
Cannot access memory at address 0x2031203920312038
(gdb) bt
#0 0x00007f497ac4ae96 in svn_error_clear (err=0x2031203920312038)
at ../src/subversion/libsvn_subr/error.c:341
#1 0x00007f497a7a83e6 in svn_fs_bdb__wrap_db (fs=0x7f49641183c0,
operation=0x7f497a7d3e39 "opening 'nodes' table", db_err=0)
at ../src/subversion/libsvn_fs_base/bdb/bdb-err.c:96
#2 0x00007f497a7b7219 in open_databases (fs=0x7f49641183c0, create=0,
format=4,
path=0x1f26f70
"/home/pm/sw/subversion/obj/subversion/tests/cmdline/svn-test-work/repositories/merge_reintegrate_tests-2/db",
pool=0x7f495c0029b8)
at ../src/subversion/libsvn_fs_base/fs.c:564
#3 0x00007f497a7b7c27 in base_open (fs=0x7f49641183c0,
path=0x1f26f70
"/home/pm/sw/subversion/obj/subversion/tests/cmdline/svn-test-work/repositories/merge_reintegrate_tests-2/db",
pool=0x7f495c0029b8,
common_pool=0x1aa8ac8) at ../src/subversion/libsvn_fs_base/fs.c:763
#4 0x00007f497b0b65a6 in svn_fs_open (fs_p=0x1f26ea8,
path=0x1f26f70
"/home/pm/sw/subversion/obj/subversion/tests/cmdline/svn-test-work/repositories/merge_reintegrate_tests-2/db",
fs_config=0x1f26d88,
pool=0x7f495c0029b8) at ../src/subversion/libsvn_fs/fs-loader.c:374
#5 0x00007f497b2e78c7 in get_repos (repos_p=0x7f495c03ec28,
path=0x7f495c00e978
"/home/pm/sw/subversion/obj/subversion/tests/cmdline/svn-test-work/repositories/merge_reintegrate_tests-2",
exclusive=0,
nonblocking=0, open_fs=1, fs_config=0x1f26d88, pool=0x7f495c0029b8)
at ../src/subversion/libsvn_repos/repos.c:1416
#6 0x00007f497b2e7a14 in svn_repos_open2 (repos_p=0x7f495c03ec28,
path=0x7f495c00e978
"/home/pm/sw/subversion/obj/subversion/tests/cmdline/svn-test-work/repositories/merge_reintegrate_tests-2",
fs_config=0x1f26d88,
pool=0x7f495c0029b8) at ../src/subversion/libsvn_repos/repos.c:1462
#7 0x00007f497b51bb1c in get_resource (r=0x7f49640f7080,
root_path=0x7f495c00e940
"/svn-test-work/repositories/merge_reintegrate_tests-2",
label=0x7f49640f8667 "9", use_checked_in=0, resource=0x7f4976d30b88)
at ../src/subversion/mod_dav_svn/repos.c:2159
#8 0x00007f497b736b74 in dav_get_resource (r=0x7f49640f7080,
label_allowed=<optimized out>, use_checked_in=0,
res_p=0x7f4976d30b88)
at /home/pm/sw/httpd/src/modules/dav/main/mod_dav.c:712
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