5:42 a.m.
HI!
I'm trying to run current RE24 with BDB 4.7.25p1. It hangs in test-001
and it hangs (probably when doing a bind). Is that combination really
stable?
Ciao, Michael.
6:17 a.m.
On Sat, 20 Sep 2008, Michael Ströder wrote:
I'm trying to run current RE24 with BDB 4.7.25p1. It hangs in
test-001
and it hangs (probably when doing a bind). Is that combination really
stable?
db-4.7.25 patched with
http://www.oracle.com/technology/products/berkeley-db/db/update/4.7.25/pa...
has been my platform for this round of RE24 testing. It completes test001
in my experience: I see the much-discussed test050 issue, and I filed
ITS#5701 for the other situation I've seen.
10:16 a.m.
Aaron Richton wrote:
On Sat, 20 Sep 2008, Michael Ströder wrote:
> I'm trying to run current RE24 with BDB 4.7.25p1. It hangs in test-001
> and it hangs (probably when doing a bind). Is that combination really
> stable?
db-4.7.25 patched with
http://www.oracle.com/technology/products/berkeley-db/db/update/4.7.25/pa...
Yes. That's what I meant with 4.7.25p1.
has been my platform for this round of RE24 testing. It completes
test001 in my experience: I see the much-discussed test050 issue, and I
filed ITS#5701 for the other situation I've seen.
If I compile on openSUSE with pre-installed 4.5.20 all works.
I tried to compile without SASL and Kerberos V support to exclude all
issues concerning a libdb mix. Still no sucess.
Ciao, Michael.
10:55 a.m.
--On Saturday, September 20, 2008 7:16 PM +0200 Michael Ströder
<michael(a)stroeder.com> wrote:
Aaron Richton wrote:
> On Sat, 20 Sep 2008, Michael Ströder wrote:
>
>> I'm trying to run current RE24 with BDB 4.7.25p1. It hangs in test-001
>> and it hangs (probably when doing a bind). Is that combination really
>> stable?
It's passed all tests for me.
--Quanah
--
Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra :: the leader in open source messaging and collaboration
11:01 a.m.
Quanah Gibson-Mount wrote:
--On Saturday, September 20, 2008 7:16 PM +0200 Michael Ströder
<michael(a)stroeder.com> wrote:
> Aaron Richton wrote:
>> On Sat, 20 Sep 2008, Michael Ströder wrote:
>>
>>> I'm trying to run current RE24 with BDB 4.7.25p1. It hangs in test-001
>>> and it hangs (probably when doing a bind). Is that combination really
>>> stable?
It's passed all tests for me.
It hangs on my system. Building with a separate installation of BDB
4.6.21p3 with the very same build script simply works.
Ciao, Michael.
noon
--On Saturday, September 20, 2008 8:01 PM +0200 Michael Ströder
<michael(a)stroeder.com> wrote:
It hangs on my system. Building with a separate installation of BDB
4.6.21p3 with the very same build script simply works.
I suggest gathering some debug info then. AFAIK, no one else is seeing the
issue.
--Quanah
--
Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra :: the leader in open source messaging and collaboration
1:23 p.m.
Michael Ströder <michael(a)stroeder.com> writes:
Aaron Richton wrote:
> On Sat, 20 Sep 2008, Michael Ströder wrote:
>
>> I'm trying to run current RE24 with BDB 4.7.25p1. It hangs in test-001
>> and it hangs (probably when doing a bind). Is that combination really
>> stable?
>
> db-4.7.25 patched with
>
>
http://www.oracle.com/technology/products/berkeley-db/db/update/4.7.25/pa...
Yes. That's what I meant with 4.7.25p1.
> has been my platform for this round of RE24 testing. It completes
> test001 in my experience: I see the much-discussed test050 issue, and I
> filed ITS#5701 for the other situation I've seen.
If I compile on openSUSE with pre-installed 4.5.20 all works.
I tried to compile without SASL and Kerberos V support to exclude all
issues concerning a libdb mix. Still no sucess.
I can confirm this, at least for openSUSE-11.0.
BerkelyDB.4.7 patched, test001-slapadd hangs, unfortunately no
logfiles available.
>>>> Starting test001-slapadd ...
running
defines.sh
Running slapadd to build slapd database...
^Cmake: *** [bdb-yes] Unterbrechung
servers/slapd/.libs> ldd lt-slapd
linux-vdso.so.1 => (0x00007fff17dfe000)
libldap_r-2-devel.so.0 =>
/work/ldap-src/libraries/libldap_r/.libs/libldap_r-2-devel.so.0 (0x00007fd20f8ad000)
liblber-2-devel.so.0 =>
/work/ldap-src/libraries/liblber/.libs/liblber-2-devel.so.0 (0x00007fd20f69b000)
libltdl.so.3 => /usr/lib64/libltdl.so.3 (0x00007fd20f493000)
libdb-4.7.so => /usr/local/BerkeleyDB.4.7/lib/libdb-4.7.so
(0x00007fd20f0c5000)
libodbc.so.1 => /usr/lib64/libodbc.so.1 (0x00007fd20ee59000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fd20ec3d000)
libsasl2.so.2 => /usr/lib64/libsasl2.so.2 (0x00007fd20ea22000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007fd20e81e000)
libssl.so.0.9.8 => /usr/lib64/libssl.so.0.9.8 (0x00007fd20e5d0000)
libcrypto.so.0.9.8 => /usr/lib64/libcrypto.so.0.9.8 (0x00007fd20e24f000)
libresolv.so.2 => /lib64/libresolv.so.2 (0x00007fd20e03a000)
libc.so.6 => /lib64/libc.so.6 (0x00007fd20dce1000)
/lib64/ld-linux-x86-64.so.2 (0x00007fd20fb07000)
libz.so.1 => /lib64/libz.so.1 (0x00007fd20dacb000)
-Dieter
--
Dieter Klünter | Systemberatung
http://www.dpunkt.de/buecher/2104.html
GPG Key ID:8EF7B6C6
53°08'09,95"N
10°08'02,42"E
2:07 p.m.
--On Saturday, September 20, 2008 10:23 PM +0200 Dieter Kluenter
<dieter(a)dkluenter.de> wrote:
>>>>> Starting test001-slapadd ...
running defines.sh
Running slapadd to build slapd database...
^Cmake: *** [bdb-yes] Unterbrechung
What flags were used to build BDB 4.7?
What about a gdb backtrace of the hung process?
--Quanah
--
Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra :: the leader in open source messaging and collaboration
3:01 p.m.
Quanah Gibson-Mount wrote:
What flags were used to build BDB 4.7?
See my build script as attachment.
What about a gdb backtrace of the hung process?
See attachment bt_full.txt. I hope I've grabbed all the lines correctly.
I've added -d in tests/scripts/test001-slapadd (see debug output in
attachment). It always hangs adding entry
ou=Alumni Association,ou=People,dc=example,dc=com.
Ciao, Michael.
(gdb) bt full
#0 0xffffe430 in __kernel_vsyscall ()
No symbol table info available.
#1 0xb7df1c15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
No symbol table info available.
#2 0xb7ea5eb6 in __db_pthread_mutex_lock () from /opt/bdb-4.7/lib/libdb-4.7.so
No locals.
#3 0xb7ea5947 in __db_tas_mutex_lock () from /opt/bdb-4.7/lib/libdb-4.7.so
No locals.
#4 0xb7f5736e in __lock_getobj () from /opt/bdb-4.7/lib/libdb-4.7.so
No locals.
#5 0xb7f54510 in __lock_get_internal () from /opt/bdb-4.7/lib/libdb-4.7.so
No locals.
#6 0xb7f53d5d in __lock_get_api () from /opt/bdb-4.7/lib/libdb-4.7.so
No locals.
#7 0xb7f53bb0 in __lock_get_pp () from /opt/bdb-4.7/lib/libdb-4.7.so
No locals.
#8 0x081419e4 in bdb_dn2id_lock (bdb=0x8308de0, dn=0xbf9bc490, rw=0, txn=0x83315b0,
lock=0xbf9bc46c) at dn2id.c:47
rc = 0
lockobj = {data = 0x83317e8, size = 49, ulen = 0, dlen = 3214656424, doff = 0, app_data =
0x8323190,
flags = 3087384564}
db_rw = 1
#9 0x08142768 in bdb_dn2id (op=0xbf9bc6fc, dn=0xbf9bc490, ei=0xbf9bc480, txn=0x83315b0,
lock=0xbf9bc46c) at dn2id.c:307
bdb = (struct bdb_info *) 0x8308de0
db = (DB *) 0x8324ab0
cursor = (DBC *) 0x8325040
rc = 0
key = {data = 0x8330650, size = 51, ulen = 0, dlen = 0, doff = 0, app_data = 0x0, flags =
0}
data = {data = 0xbf9bc3e0, size = 0, ulen = 4, dlen = 0, doff = 0, app_data = 0x0, flags
= 256}
nid = 0
#10 0x0813c0c7 in bdb_cache_find_ndn (op=0xbf9bc6fc, txn=0x83315b0, ndn=0xbf9bc564,
res=0xbf9bc550) at cache.c:451
lock = {off = 0, ndx = 492, gen = 9, mode = DB_LOCK_NG}
len = 21
bdb = (struct bdb_info *) 0x8308de0
ei = {bei_parent = 0x8331708, bei_id = 2, bei_lockpad = 1, bei_state = 0, bei_finders =
137565636, bei_nrdn = {
bv_len = 49, bv_val = 0x83317e8 "ou=alumni
association,ou=people,dc=example,dc=com"}, bei_e = 0x188,
bei_kids = 0xffffffd5, bei_kids_mutex = {__data = {__lock = 137565616, __count =
3077857920, __owner = 888,
__kind = -1207890183, __nusers = 3077857920, {__spins = 137506296, __list = {__next
= 0x8322df8}}},
__size =
"\ufffd\0253\b\200bt\ufffdx\003\000\000\ufffd\016\001\ufffd\200bt\ufffd\ufffd-2\b",
__align = 137565616}, bei_lrunext = 0x8323550,
bei_lruprev = 0xb77460c0}
eip = (EntryInfo *) 0x8331708
ei2 = (EntryInfo *) 0x0
rc = 0
ptr = 0x83317e8 "ou=alumni association,ou=people,dc=example,dc=com"
#11 0x080fa9d7 in bdb_tool_next_id (op=0xbf9bc6fc, tid=0x83315b0, e=0x83253e4,
text=0xbf9bcb38, hole=0) at tools.c:344
dn = {bv_len = 49, bv_val = 0x83305c8 "ou=Alumni
Association,ou=People,dc=example,dc=com"}
ndn = {bv_len = 49, bv_val = 0x83317e8 "ou=alumni
association,ou=people,dc=example,dc=com"}
pdn = {bv_len = 0, bv_val = 0x0}
npdn = {bv_len = 3, bv_val = 0x0}
ei = (EntryInfo *) 0x0
eidummy = {bei_parent = 0xd, bei_id = 3082768704, bei_lockpad = 5552, bei_state = 2099,
bei_finders = 137506296,
bei_nrdn = {bv_len = 3077890240, bv_val = 0xb7b2312e
"\201\ufffd\ufffd\016\r"}, bei_e = 0xb7746280, bei_kids = 0x0,
bei_kids_mutex = {__data = {__lock = -1207652364, __count = 136227632, __owner =
-1080310392, __kind = -1207845700,
__nusers = 137507216, {__spins = 0, __list = {__next = 0x0}}},
__size =
"\ufffd\ufffd\004\ufffd0\ufffd\036\b\210\ufffd\233\ufffd\ufffd\ufffd\001\ufffd\22012\b\000\000\000",
__align = -1207652364}, bei_lrunext = 0x0,
bei_lruprev = 0xbf9bc7d4}
rc = 137507216
#12 0x080fb46f in bdb_tool_entry_put (be=0x8308ce0, e=0x83253e4, text=0xbf9bcb38) at
tools.c:520
rc = 0
bdb = (struct bdb_info *) 0x8308de0
tid = (DB_TXN *) 0x83315b0
op = {o_hdr = 0xbf9bc5d4, o_tag = 0, o_time = 0, o_tincr = 0, o_bd = 0x8308ce0, o_req_dn
= {bv_len = 0,
bv_val = 0x0}, o_req_ndn = {bv_len = 0, bv_val = 0x0}, o_request = {oq_add =
{rs_modlist = 0x0, rs_e = 0x0},
oq_bind = {rb_method = 0, rb_cred = {bv_len = 0, bv_val = 0x0}, rb_edn = {bv_len = 0,
bv_val = 0x0}, rb_ssf = 0,
rb_mech = {bv_len = 0, bv_val = 0x0}}, oq_compare = {rs_ava = 0x0}, oq_modify =
{rs_mods = {rs_modlist = 0x0,
rs_no_opattrs = 0 '\0'}, rs_increment = 0}, oq_modrdn = {rs_mods =
{rs_modlist = 0x0, rs_no_opattrs = 0 '\0'},
rs_deleteoldrdn = 0, rs_newrdn = {bv_len = 0, bv_val = 0x0}, rs_nnewrdn = {bv_len =
0, bv_val = 0x0},
rs_newSup = 0x0, rs_nnewSup = 0x0}, oq_search = {rs_scope = 0, rs_deref = 0,
rs_slimit = 0, rs_tlimit = 0,
rs_limit = 0x0, rs_attrsonly = 0, rs_attrs = 0x0, rs_filter = 0x0, rs_filterstr =
{bv_len = 0, bv_val = 0x0}},
oq_abandon = {rs_msgid = 0}, oq_cancel = {rs_msgid = 0}, oq_extended = {rs_reqoid =
{bv_len = 0, bv_val = 0x0},
rs_flags = 0, rs_reqdata = 0x0}, oq_pwdexop = {rs_extended = {rs_reqoid = {bv_len =
0, bv_val = 0x0}, rs_flags = 0,
rs_reqdata = 0x0}, rs_old = {bv_len = 0, bv_val = 0x0}, rs_new = {bv_len = 0,
bv_val = 0x0}, rs_mods = 0x0,
rs_modtail = 0x0}}, o_abandon = 0, o_cancel = 0, o_groups = 0x0, o_do_not_cache = 0
'\0', o_is_auth_check = 0 '\0',
o_acl_priv = ACL_NONE, o_nocaching = 0 '\0', o_delete_glue_parent = 0
'\0', o_no_schema_check = 0 '\0',
o_no_subordinate_glue = 0 '\0', o_ctrlflag = '\0' <repeats 31
times>, o_controls = 0x0, o_authz = {sai_method = 0,
sai_mech = {bv_len = 0, bv_val = 0x0}, sai_dn = {bv_len = 0, bv_val = 0x0}, sai_ndn =
{bv_len = 0, bv_val = 0x0},
sai_ssf = 0, sai_transport_ssf = 0, sai_tls_ssf = 0, sai_sasl_ssf = 0}, o_ber = 0x0,
o_res_ber = 0x0,
o_callback = 0x0, o_ctrls = 0x0, o_csn = {bv_len = 0, bv_val = 0x0}, o_private = 0x0,
o_extra = {slh_first = 0x0},
o_next = {stqe_next = 0x0}}
ohdr = {oh_opid = 0, oh_connid = 0, oh_conn = 0x0, oh_msgid = 0, oh_protocol = 0, oh_tid
= 0, oh_threadctx = 0x0,
oh_tmpmemctx = 0x0, oh_tmpmfuncs = 0x8262e84, oh_counters = 0x0, oh_log_prefix =
'\0' <repeats 255 times>}
__PRETTY_FUNCTION__ = "bdb_tool_entry_put"
#13 0x080e92fd in slapadd (argc=10, argv=0xbf9c4e14) at slapadd.c:322
e = (Entry *) 0x83253e4
buf = 0x832f340 "dn"
text = 0x0
textbuf = '\0' <repeats 255 times>
textlen = 256
progname = 0x8206f80 "slapadd"
csn = {bv_len = 40, bv_val = 0x826bf60
"20080920215653.107542Z#000000#000#000000"}
maxcsn = {{bv_len = 0, bv_val = 0x0} <repeats 3685 times>, {bv_len = 0,
bv_val = 0xb80bab48 "\205\ufffdu\ufffd\203\ufffd\b\ufffd\001"}, {bv_len =
3081380161, bv_val = 0xb7c0b4f4 "libc.so.6"}, {
bv_len = 3087826932, bv_val = 0xb7c0b298 ""}, {bv_len = 1537, bv_val =
0xbf9c4114 "4A\234\ufffdF\225\v\ufffd\001"}, {
bv_len = 3087745686, bv_val = 0xb7aa2141 "libc.so.6"}, {bv_len = 3082785937,
bv_val = 0x0}, {bv_len = 0,
bv_val = 0x0}, {bv_len = 0, bv_val = 0x0}, {bv_len = 3081380161, bv_val = 0x0},
{bv_len = 0, bv_val = 0x0}, {
bv_len = 3087826976, bv_val = 0x0}, {bv_len = 0, bv_val = 0x0}, {bv_len = 0, bv_val =
0xb7c0b638 ""}, {bv_len = 0,
bv_val = 0x0}, {bv_len = 3082785937, bv_val = 0x0}, {bv_len = 0, bv_val = 0xb80bab48
"\205\ufffdu\ufffd\203\ufffd\b\ufffd\001"}, {
bv_len = 3081532123, bv_val = 0xb80ac58a "ld-linux.so.2"}, {bv_len =
3087826932, bv_val = 0xb80c82a0 ""}, {
bv_len = 3214691144, bv_val = 0xbf9c418c
"\ufffdA\234\ufffdF\225\v\ufffd\001"}, {bv_len = 3087745686, bv_val = 0x0},
{bv_len = 0,
bv_val = 0x0}, {bv_len = 0, bv_val = 0x0}, {bv_len = 0, bv_val = 0x0}, {bv_len =
3081532123, bv_val = 0x0}, {
bv_len = 0, bv_val = 0x0}, {bv_len = 3087826976, bv_val = 0x0}, {bv_len = 0, bv_val =
0x0}, {bv_len = 0,
bv_val = 0xb7c0b298 ""}, {bv_len = 3214688168, bv_val = 0xb80c7ff4
"\030\ufffd\001"}, {bv_len = 3082860088,
bv_val = 0xb80b3021
"\213V\024\ufffd\ufffd\002\017\205\202\ufffd\ufffd\ufffd\213\203\ufffd\ufffd\ufffd\ufffd\211T$\b\211D$\004\ufffd\ufffd#\205`\ufffd\ufffd\ufffd\211\004$\ufffdE\ufffd"},
{
bv_len = 3081453836, bv_val = 0x0}, {bv_len = 8, bv_val = 0x812 <Address 0x812 out
of bounds>}, {bv_len = 3,
bv_val = 0xb80bab48 "\205\ufffdu\ufffd\203\ufffd\b\ufffd\001"}, {bv_len =
3082785927, bv_val = 0xb7c0b4f4 "libc.so.6"}, {
bv_len = 3087826932, bv_val = 0xb7c0b298 ""}, {bv_len = 1537, bv_val =
0xbf9c4214
"\230\ufffd\ufffd\ufffd\ufffd\216\v\ufffd\234\ufffd\ufffd\ufffd\230\ufffd\ufffd\ufffd\b"},
{bv_len = 3087745686, bv_val = 0xb7bf9487 "libc.so.6"}, {bv_len = 3082785937,
bv_val = 0x12000 <Address 0x12000 out of bounds>}, {bv_len = 72708,
bv_val = 0x11c04 <Address 0x11c04 out of bounds>}, {bv_len = 0, bv_val = 0x5
<Address 0x5 out of bounds>}, {
bv_len = 3082785927, bv_val = 0x14000 <Address 0x14000 out of bounds>}, {bv_len
= 78092,
bv_val = 0xb80b53ec "\201\ufffd\b,\001"}, {bv_len = 3087826976, bv_val = 0x3
<Address 0x3 out of bounds>}, {bv_len = 15,
bv_val = 0xb7c0b8a0 "/lib"}, {bv_len = 0, bv_val = 0xb7c0b000 ""},
{bv_len = 0, bv_val = 0xb7c0b638 ""}, {
bv_len = 3082785937, bv_val = 0xb80b2db5 "\ufffdE\030\b\017\204:\003"},
{bv_len = 3, bv_val = 0x0}, {bv_len = 0,
bv_val = 0xb80bab48 "\205\ufffdu\ufffd\203\ufffd\b\ufffd\001"}, {bv_len =
3082863780, bv_val = 0xb7c0b4f4 "libc.so.6"}, {
bv_len = 3087826932, bv_val = 0xb7c0b298 ""}, {bv_len = 1537, bv_val =
0xbf9c4294 "D\ufffd\ufffd\ufffd8\ufffd\ufffd\ufffd\b"}, {
bv_len = 3087745686, bv_val = 0xb7c0c4a4 "libc.so.6"}, {bv_len = 3082785937,
bv_val = 0xa0 <Address 0xa0 out of bounds>}, {bv_len = 1869807665,
bv_val = 0xfffff000 <Address 0xfffff000 out of bounds>}, {bv_len = 3087714368,
bv_val = 0xb80c8020 "x\206\f\ufffd "}, {
bv_len = 3082863780, bv_val = 0x803 <Address 0x803 out of bounds>}, {bv_len =
24,
bv_val = 0x3 <Address 0x3 out of bounds>}, {bv_len = 3087826976, bv_val = 0x3
<Address 0x3 out of bounds>}, {
bv_len = 3084443158, bv_val = 0xbf9c41a0 ""}, {bv_len = 0, bv_val =
0xb7e00d38 ""}, {bv_len = 0,
bv_val = 0xbf9c3fe0 "\003"}, {bv_len = 3082785937, bv_val = 0x3 <Address
0x3 out of bounds>}, {bv_len = 779055918,
bv_val = 0xb80c8664 "\001"}, {bv_len = 0, bv_val = 0xb80bab48
"\205\ufffdu\ufffd\203\ufffd\b\ufffd\001"}, {bv_len = 3083249710,
bv_val = 0xb7c0b4f4 "libc.so.6"}, {bv_len = 3087826932, bv_val = 0xb7c0b298
""}, {bv_len = 1537,
bv_val = 0xbf9c4314 " \ufffd\ufffd\ufffd\ufffd\206\v\ufffd,\ufffd\ufffd\ufffd
\ufffd\ufffd\ufffd\b"}, {bv_len = 3087745686, bv_val = 0xb7c6a82e
"libc.so.6"}, {
bv_len = 3082785937, bv_val = 0xbf9c4010 "\221\224\ufffd\ufffd\ufffd"},
{bv_len = 77344,
bv_val = 0x13114 <Address 0x13114 out of bounds>}, {bv_len = 0,
bv_val = 0xb7ab4114 "USE Linux) 4.3.1 20080507 (prerelease) [gcc-4_3-branch
revision 135036]"}, {bv_len = 3083249710,
bv_val = 0x803 <Address 0x803 out of bounds>}, {bv_len = 0, bv_val = 0x0},
{bv_len = 3087826976,
bv_val = 0x81ed <Address 0x81ed out of bounds>}, {bv_len = 1, bv_val = 0x0},
{bv_len = 0, bv_val = 0xb7e00a88 ""}, {
bv_len = 0, bv_val = 0x0}, {bv_len = 3082785937, bv_val = 0x0}, {bv_len = 4096,
bv_val = 0xa0 <Address 0xa0 out of bounds>}, {bv_len = 0, bv_val = 0x48d571a4
<Address 0x48d571a4 out of bounds>}, {
bv_len = 0, bv_val = 0xb80bab48 "\205\ufffdu\ufffd\203\ufffd\b\ufffd\001"},
{bv_len = 3084443168, bv_val = 0xb7c0b4f4 "libc.so.6"}, {
bv_len = 3087826932, bv_val = 0xb7c0b298 ""}, {bv_len = 3087826932, bv_val =
0x0}, {bv_len = 3214691144,
bv_val = 0xbf9c4134 "\024B\234\ufffd&\236\v\ufffdHK\234\ufffd"}, {bv_len
= 3087766854, bv_val = 0x1 <Address 0x1 out of bounds>}, {
bv_len = 0, bv_val = 0x0}, {bv_len = 0, bv_val = 0x0}, {bv_len = 3082860856,
bv_val = 0xbf9c4214
"\230\ufffd\ufffd\ufffd\ufffd\216\v\ufffd\234\ufffd\ufffd\ufffd\230\ufffd\ufffd\ufffd\b"},
{bv_len = 3087769126, bv_val = 0xbf9c4b48 ""}, {bv_len = 0,
bv_val = 0xbf9c43a0 "\b\ufffd\ufffd\ufffd\b"}, {bv_len = 0, bv_val =
0xbf9c4b6b ""}, {bv_len = 3214691172, bv_val = 0xbf9c4b60 ""}, {
bv_len = 3087828420, bv_val = 0xb80c8020 "x\206\f\ufffd "}, {bv_len =
3082785937, bv_val = 0x0}, {bv_len = 0,
bv_val = 0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 3087766784, bv_val =
0xb7c0b938 "\230\ufffd\ufffd\ufffd\ufffd\202\f\ufffd"}, {bv_len = 3214688788,
bv_val = 0xbf9c413c "HK\234\ufffd"}, {bv_len = 3087769097, bv_val = 0x0},
{bv_len = 3214691144,
bv_val = 0xbf9c41ac "\214B\234\ufffd&\236\v\ufffdHK\234\ufffd"}, {bv_len
= 3087766854, bv_val = 0x1 <Address 0x1 out of bounds>}, {
bv_len = 0, bv_val = 0x0}, {bv_len = 0, bv_val = 0x0}, {bv_len = 3082860832,
bv_val = 0xbf9c428c
"8\ufffd\ufffd\ufffd\ufffd\206\v\ufffdD\ufffd\ufffd\ufffd8\ufffd\ufffd\ufffd\b"},
{bv_len = 3087769126, bv_val = 0xbf9c4b48 ""}, {bv_len = 0,
bv_val = 0x34 <Address 0x34 out of bounds>}, {bv_len = 75592, bv_val =
0xbf9c4b6b ""}, {bv_len = 3214691172,
bv_val = 0xbf9c4b60 ""}, {bv_len = 3087828420, bv_val = 0x1 <Address 0x1
out of bounds>}, {bv_len = 3087797761,
bv_val = 0x0}, {bv_len = 0, bv_val = 0xb80c7ff4 "\030\ufffd\001"}, {bv_len =
3087766784, bv_val = 0xb7c0b920 ""}, {
bv_len = 3214688908, bv_val = 0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 2,
bv_val = 0xb7c0b950 "8\ufffd\ufffd\ufffd\230\ufffd\ufffd\ufffd"}, {
bv_len = 3214688788, bv_val = 0xb80c0f35
"\203\ufffd\b[]\ufffd\220\215t&"}, {bv_len = 8,
bv_val = 0x7c <Address 0x7c out of bounds>}, {bv_len = 3087826932, bv_val =
0xb7c0b298 ""}, {bv_len = 3087765154,
bv_val = 0xb7c0b99c "\230\ufffd\ufffd\ufffd\ufffd\202\f\ufffd"}, {bv_len =
3082860952, bv_val = 0x8 <Address 0x8 out of bounds>}, {bv_len = 0,
bv_val = 0x0}, {bv_len = 3082859160, bv_val = 0x0}, {bv_len = 3087769126, bv_val =
0xbf9c4b48 ""}, {bv_len = 0,
bv_val = 0x0}, {bv_len = 0, bv_val = 0xbf9c4b6b ""}, {bv_len = 3087797761,
bv_val = 0xbf9c4b60 ""}, {
bv_len = 3087828420, bv_val = 0x12e20 <Address 0x12e20 out of bounds>}, {bv_len
= 77344, bv_val = 0x0}, {
bv_len = 480, bv_val = 0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 2, bv_val =
0x0}, {bv_len = 3214688908,
bv_val = 0xb80c0f35 "\203\ufffd\b[]\ufffd\220\215t&"}, {bv_len = 8,
bv_val = 0x14 <Address 0x14 out of bounds>}, {
bv_len = 3087826932, bv_val = 0xb7c0b938
"\230\ufffd\ufffd\ufffd\ufffd\202\f\ufffd"}, {bv_len = 3087763188,
bv_val = 0xb7c0b944 "\230\ufffd\ufffd\ufffd\ufffd\202\f\ufffd"}, {bv_len =
3082860856, bv_val = 0x8 <Address 0x8 out of bounds>}, {bv_len = 0,
bv_val = 0x0}, {bv_len = 0, bv_val = 0x0}, {bv_len = 3087827616, bv_val = 0x0},
{bv_len = 3087769126,
bv_val = 0xbf9c4b48 ""}, {bv_len = 0, bv_val = 0x41 <Address 0x41 out of
bounds>}, {bv_len = 31,
bv_val = 0xbf9c4b6b ""}, {bv_len = 3214691172, bv_val = 0xbf9c4b60
""}, {bv_len = 3087797761,
bv_val = 0x25 <Address 0x25 out of bounds>}, {bv_len = 0, bv_val = 0x0}, {bv_len
= 93,
bv_val = 0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 3087766784, bv_val =
0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 2, bv_val = 0x0},
{bv_len = 3214689044, bv_val = 0xb80c0f35
"\203\ufffd\b[]\ufffd\220\215t&"}, {bv_len = 8,
bv_val = 0x14 <Address 0x14 out of bounds>}, {bv_len = 3087826932, bv_val =
0xb7c0b920 ""}, {bv_len = 3087763188,
bv_val = 0xb7c0b92c ""}, {bv_len = 3082860832, bv_val = 0x8 <Address 0x8
out of bounds>}, {bv_len = 0, bv_val = 0x0},
{bv_len = 3082859160, bv_val = 0x0}, {bv_len = 3087769126, bv_val = 0xbf9c4b48
""}, {bv_len = 0, bv_val = 0x0}, {
bv_len = 0, bv_val = 0xbf9c4b6b ""}, {bv_len = 3214691172, bv_val =
0xbf9c4b60 ""}, {bv_len = 3087797761,
bv_val = 0x32 <Address 0x32 out of bounds>}, {bv_len = 25, bv_val = 0x0},
{bv_len = 0,
bv_val = 0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 3087766784, bv_val =
0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 2, bv_val = 0x0},
{bv_len = 3214689172, bv_val = 0xb80c0f35
"\203\ufffd\b[]\ufffd\220\215t&"}, {bv_len = 8,
bv_val = 0x14 <Address 0x14 out of bounds>}, {bv_len = 3087826932, bv_val =
0xb7c0b908 "8\r\ufffd\ufffd\230\ufffd\ufffd\ufffd"}, {
bv_len = 3087763188, bv_val = 0xb7c0b914
"8\r\ufffd\ufffd\230\ufffd\ufffd\ufffd"}, {bv_len = 3082860808,
bv_val = 0x8 <Address 0x8 out of bounds>}, {bv_len = 0, bv_val = 0x0}, {bv_len =
3082859160, bv_val = 0x0}, {
bv_len = 0, bv_val = 0xbf9c449c
"\ufffd\ufffd\ufffd\ufffd\ufffd\206\v\ufffd\u0238\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\024"},
{bv_len = 3087769126, bv_val = 0xbf9c4b48 ""}, {
bv_len = 0, bv_val = 0x0}, {bv_len = 0, bv_val = 0xbf9c4b6b ""}, {bv_len =
3087797761, bv_val = 0xbf9c4b60 ""}, {
bv_len = 3087828420, bv_val = 0x0}, {bv_len = 3214689912, bv_val = 0x0}, {bv_len =
3214691179,
bv_val = 0xb80c7ff4 "\030\ufffd\001"}, {bv_len = 4, bv_val = 0x0}, {bv_len =
3214689300,
bv_val = 0xb80c0f35 "\203\ufffd\b[]\ufffd\220\215t&"}, {bv_len = 8,
bv_val = 0x24 <Address 0x24 out of bounds>}, {
bv_len = 3087826932, bv_val = 0xb7c0b8e0
"\210\n\ufffd\ufffd8\005\ufffd\ufffd8\ufffd\ufffd\ufffd\230\ufffd\ufffd\ufffd"},
{bv_len = 3087763188,
bv_val = 0xb7c0b8f4
"\210\n\ufffd\ufffd8\005\ufffd\ufffd8\ufffd\ufffd\ufffd\230\ufffd\ufffd\ufffd"},
{bv_len = 3082860768, bv_val = 0x10 <Address 0x10 out of bounds>},
{bv_len = 3087750124, bv_val = 0x0}, {bv_len = 3084911928, bv_val = 0xb7c0b638
""}, {bv_len = 3082859160,
bv_val = 0x0}, {bv_len = 3214691144, bv_val = 0xbf9c4464
"DE\234\ufffd&\236\v\ufffdHK\234\ufffd"}, {bv_len = 3087766854,
bv_val = 0x1 <Address 0x1 out of bounds>}, {bv_len = 0, bv_val = 0x0}...}
sid = 3087768694
bvtext = {bv_len = 256, bv_val = 0xbf9c4b48 ""}
attr = (Attribute *) 0xb80c8830
ctxcsn_e = (Entry *) 0xb7c0ba08
ctxcsn_id = 1
id = 3
opbuf = {ob_op = {o_hdr = 0xbf9bc990, o_tag = 0, o_time = 0, o_tincr = 0, o_bd =
0x8308ce0, o_req_dn = {
bv_len = 0, bv_val = 0x0}, o_req_ndn = {bv_len = 0, bv_val = 0x0}, o_request =
{oq_add = {rs_modlist = 0x0,
rs_e = 0x0}, oq_bind = {rb_method = 0, rb_cred = {bv_len = 0, bv_val = 0x0},
rb_edn = {bv_len = 0, bv_val = 0x0},
rb_ssf = 0, rb_mech = {bv_len = 0, bv_val = 0x0}}, oq_compare = {rs_ava = 0x0},
oq_modify = {rs_mods = {
rs_modlist = 0x0, rs_no_opattrs = 0 '\0'}, rs_increment = 0}, oq_modrdn
= {rs_mods = {rs_modlist = 0x0,
rs_no_opattrs = 0 '\0'}, rs_deleteoldrdn = 0, rs_newrdn = {bv_len = 0,
bv_val = 0x0}, rs_nnewrdn = {bv_len = 0,
bv_val = 0x0}, rs_newSup = 0x0, rs_nnewSup = 0x0}, oq_search = {rs_scope = 0,
rs_deref = 0, rs_slimit = 0,
rs_tlimit = 0, rs_limit = 0x0, rs_attrsonly = 0, rs_attrs = 0x0, rs_filter = 0x0,
rs_filterstr = {bv_len = 0,
bv_val = 0x0}}, oq_abandon = {rs_msgid = 0}, oq_cancel = {rs_msgid = 0},
oq_extended = {rs_reqoid = {
bv_len = 0, bv_val = 0x0}, rs_flags = 0, rs_reqdata = 0x0}, oq_pwdexop =
{rs_extended = {rs_reqoid = {
bv_len = 0, bv_val = 0x0}, rs_flags = 0, rs_reqdata = 0x0}, rs_old = {bv_len =
0, bv_val = 0x0}, rs_new = {
bv_len = 0, bv_val = 0x0}, rs_mods = 0x0, rs_modtail = 0x0}}, o_abandon = 0,
o_cancel = 0, o_groups = 0x0,
o_do_not_cache = 0 '\0', o_is_auth_check = 0 '\0', o_acl_priv =
ACL_NONE, o_nocaching = 0 '\0',
o_delete_glue_parent = 0 '\0', o_no_schema_check = 0 '\0',
o_no_subordinate_glue = 0 '\0',
o_ctrlflag = '\0' <repeats 31 times>, o_controls = 0x0, o_authz =
{sai_method = 0, sai_mech = {bv_len = 0,
bv_val = 0x0}, sai_dn = {bv_len = 0, bv_val = 0x0}, sai_ndn = {bv_len = 0, bv_val
= 0x0}, sai_ssf = 0,
sai_transport_ssf = 0, sai_tls_ssf = 0, sai_sasl_ssf = 0}, o_ber = 0x0, o_res_ber =
0x0, o_callback = 0x0,
o_ctrls = 0x0, o_csn = {bv_len = 0, bv_val = 0x0}, o_private = 0x0, o_extra =
{slh_first = 0x0}, o_next = {
stqe_next = 0x0}}, ob_hdr = {oh_opid = 0, oh_connid = 0, oh_conn = 0x0, oh_msgid =
0, oh_protocol = 0, oh_tid = 0,
oh_threadctx = 0x0, oh_tmpmemctx = 0x0, oh_tmpmfuncs = 0x0, oh_counters = 0x0,
oh_log_prefix = '\0' <repeats 255 times>}, ob_controls = {0x0
<repeats 32 times>}}
op = (Operation *) 0xbf9bc8b8
match = 0
checkvals = 1
lineno = 30
nextline = 33
lmax = 4110
rc = 0
manage = 0
__PRETTY_FUNCTION__ = "slapadd"
#14 0x080503df in main (argc=10, argv=0xbf9c4e14) at main.c:645
i = 0
no_detach = 0
rc = 1
urls = 0x0
username = 0x0
groupname = 0x0
sandbox = 0x0
syslogUser = 160
g_argc = 10
g_argv = (char **) 0xbf9c4e14
configfile = 0x0
configdir = 0x0
serverName = 0xbf9c6f3e "lt-slapd"
serverMode = 1
scp = (struct sync_cookie *) 0x0
scp_entry = (struct sync_cookie *) 0x0
debug_unknowns = (char **) 0x0
syslog_unknowns = (char **) 0x0
serverNamePrefix = 0x81eb06b ""
l = 1
slapd_pid_file_unlink = 0
slapd_args_file_unlink = 0
firstopt = 1
__PRETTY_FUNCTION__ = "main"
3:18 p.m.
--On Sunday, September 21, 2008 12:01 AM +0200 Michael Ströder
<michael(a)stroeder.com> wrote:
Quanah Gibson-Mount wrote:
> What flags were used to build BDB 4.7?
See my build script as attachment.
> What about a gdb backtrace of the hung process?
See attachment bt_full.txt. I hope I've grabbed all the lines correctly.
Huh, I only set two options when I build, the prefix and
--enable-posixmutexes.
--Quanah
--
Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra :: the leader in open source messaging and collaboration
3:21 p.m.
Quanah Gibson-Mount wrote:
--On Sunday, September 21, 2008 12:01 AM +0200 Michael Ströder
<michael(a)stroeder.com> wrote:
> Quanah Gibson-Mount wrote:
>> What flags were used to build BDB 4.7?
>
> See my build script as attachment.
>
>> What about a gdb backtrace of the hung process?
>
> See attachment bt_full.txt. I hope I've grabbed all the lines correctly.
Huh, I only set two options when I build, the prefix and
--enable-posixmutexes.
Do you see any problem? This build script works since years...
BTW: Same problem with HEAD.
Ciao, Michael.
3:43 p.m.
--On Sunday, September 21, 2008 12:21 AM +0200 Michael Ströder
<michael(a)stroeder.com> wrote:
Do you see any problem? This build script works since years...
With very latest RE24, I have no issue with my BDB 4.7 build:
[quanah@freelancer tests]$ ./run test001
Running ./scripts/test001-slapadd...
running defines.sh
Running slapadd to build slapd database...
Starting slapd on TCP/IP port 9011...
Using ldapsearch to retrieve all the entries...
Filtering ldapsearch results...
Filtering original ldif used to create database...
Comparing filter output...
>>>> Test succeeded
[quanah@freelancer .libs]$ ldd lt-slapd
libldap_r-2.4-releng.so.2 =>
/home/quanah/q/openldap-2.4.12/libraries/libldap_r/.libs/libldap_r-2.4-releng.so.2
(0x00002b03b71a9000)
liblber-2.4-releng.so.2 =>
/home/quanah/q/openldap-2.4.12/libraries/liblber/.libs/liblber-2.4-releng.so.2
(0x00002b03b7401000)
libltdl.so.3 => /usr/lib64/libltdl.so.3 (0x00002b03b761e000)
libdb-4.7.so => /opt/zimbra/bdb-4.7.25.1/lib/libdb-4.7.so
(0x00002b03b7826000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00000038dcc00000)
libsasl2.so.2 => /opt/zimbra/cyrus-sasl-2.1.22.3z/lib/libsasl2.so.2
(0x00002b03b7b6f000)
libdl.so.2 => /lib64/libdl.so.2 (0x00000038dc400000)
libssl.so.0.9.8 => /opt/zimbra/openssl-0.9.8g/lib/libssl.so.0.9.8
(0x00002b03b7d88000)
libcrypto.so.0.9.8 =>
/opt/zimbra/openssl-0.9.8g/lib/libcrypto.so.0.9.8 (0x00002b03b7fd0000)
libresolv.so.2 => /lib64/libresolv.so.2 (0x00000038e0000000)
libc.so.6 => /lib64/libc.so.6 (0x00000038dc000000)
/lib64/ld-linux-x86-64.so.2 (0x00000038dbc00000)
--Quanah
--
Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra :: the leader in open source messaging and collaboration
4:03 p.m.
Quanah Gibson-Mount wrote:
With very latest RE24, I have no issue with my BDB 4.7 build:
Note that I always keep my RE24 source tree in sync. And same problem
with HEAD anyway.
Any more information I can give additional to my last e-mail? Anything
you can derive from the stack trace I provided?
ldd output (see below) also seems right to me. And yes, I already tried
without SASL and Kerberos to avoid BDB lib mix. But it works with BDB
4.6 anyway.
Ciao, Michael.
michael@nb2:~/src/openldap/OPENLDAP_REL_ENG_2_4/openldap> ldd
./servers/slapd/.libs/lt-slapd
linux-gate.so.1 => (0xffffe000)
libldap_r-2.4-releng.so.2 =>
/home/michael/src/openldap/OPENLDAP_REL_ENG_2_4/openldap/libraries/libldap_r/.libs/libldap_r-2.4-releng.so.2
(0xb7f16000)
liblber-2.4-releng.so.2 =>
/home/michael/src/openldap/OPENLDAP_REL_ENG_2_4/openldap/libraries/liblber/.libs/liblber-2.4-releng.so.2
(0xb7f06000)
libdb-4.7.so => /opt/bdb-4.7/lib/libdb-4.7.so (0xb7d3e000)
libodbc.so.1 => /usr/lib/libodbc.so.1 (0xb7ccf000)
libpthread.so.0 => /lib/libpthread.so.0 (0xb7ca1000)
libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0xb7c88000)
libdl.so.2 => /lib/libdl.so.2 (0xb7c84000)
libssl.so.0.9.8 => /usr/lib/libssl.so.0.9.8 (0xb7c3f000)
libcrypto.so.0.9.8 => /usr/lib/libcrypto.so.0.9.8 (0xb7afb000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0xb7ac5000)
libresolv.so.2 => /lib/libresolv.so.2 (0xb7ab1000)
libc.so.6 => /lib/libc.so.6 (0xb796e000)
/lib/ld-linux.so.2 (0xb7f65000)
libz.so.1 => /lib/libz.so.1 (0xb795a000)
2:33 p.m.
Michael Ströder wrote:
Quanah Gibson-Mount wrote:
> What flags were used to build BDB 4.7?
See my build script as attachment.
../dist/configure \
--prefix=/opt/bdb-${BDB_VERSION} \
--with-uniquenames \
The above is not a valid option
--enable-diagnostic \
This appears to be the only significant difference from a default config. Try
without.
--enable-shared \
--enable-static \
--enable-rpc \
--disable-java \
--enable-posixmutexes \
--enable-largefile \
--enable-cxx \
--disable-compat185 \
i686-suse-linux
make
> What about a gdb backtrace of the hung process?
See attachment bt_full.txt. I hope I've grabbed all the lines correctly.
I've added -d in tests/scripts/test001-slapadd (see debug output in
attachment). It always hangs adding entry
ou=Alumni Association,ou=People,dc=example,dc=com.
Ciao, Michael.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
2:45 p.m.
On Mon, 22 Sep 2008, Howard Chu wrote:
...
> --enable-diagnostic \
This appears to be the only significant difference from a default
config. Try without.
Note that the layout of the shared-memory regions (__db.0*) is different
for BDB compiles with and without the --enable-diagnostic option. They
cannot be mixed for a given environment, so any db_* utilities you use
along side slapd should be from the same compile. Hangs and crashes would
be expected if that isn't true.
Philip Guenther
2:25 a.m.
Philip Guenther wrote:
On Mon, 22 Sep 2008, Howard Chu wrote:
...
>> --enable-diagnostic \
> This appears to be the only significant difference from a default
> config. Try without.
Note that the layout of the shared-memory regions (__db.0*) is different
for BDB compiles with and without the --enable-diagnostic option. They
cannot be mixed for a given environment, so any db_* utilities you use
along side slapd should be from the same compile. Hangs and crashes would
be expected if that isn't true.
Off course I always use the db_* utils from the right build. But AFAIK
db_* utils are not involved at all when running make test.
Also note that the very same build script simply works with BDB 4.6.
Ciao, Michael.
1:25 p.m.
--On September 23, 2008 11:25:16 AM +0200 Michael Ströder
<michael(a)stroeder.com> wrote:
Off course I always use the db_* utils from the right build. But
AFAIK
db_* utils are not involved at all when running make test.
Also note that the very same build script simply works with BDB 4.6.
Howard's already followed up on the ITS as to why this is occurring, it is
a BDB 4.7 bug.
--Quanah
--
Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra :: the leader in open source messaging and collaboration
2:50 p.m.
Howard Chu wrote:
Michael Ströder wrote:
> Quanah Gibson-Mount wrote:
>> What flags were used to build BDB 4.7?
> See my build script as attachment.
> ../dist/configure \
> --prefix=/opt/bdb-${BDB_VERSION} \
> --with-uniquenames \
The above is not a valid option
> --enable-diagnostic \
This appears to be the only significant difference from a default config. Try
without.
> --enable-shared \
> --enable-static \
> --enable-rpc \
> --disable-java \
> --enable-posixmutexes \
> --enable-largefile \
> --enable-cxx \
> --disable-compat185 \
> i686-suse-linux
> make
Just to confirm, I built BDB 4.7.25 with the above options (except uniquenames
and i686-suse-linux) on dual-core x86-64 and still see no hang.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
3:42 p.m.
Howard Chu wrote:
Howard Chu wrote:
> Michael Ströder wrote:
>> Quanah Gibson-Mount wrote:
>>> What flags were used to build BDB 4.7?
>> See my build script as attachment.
>> ../dist/configure \
>> --prefix=/opt/bdb-${BDB_VERSION} \
>> --with-uniquenames \
> The above is not a valid option
>
>> --enable-diagnostic \
> This appears to be the only significant difference from a default config. Try
> without.
>
>> --enable-shared \
>> --enable-static \
>> --enable-rpc \
>> --disable-java \
>> --enable-posixmutexes \
>> --enable-largefile \
>> --enable-cxx \
>> --disable-compat185 \
>> i686-suse-linux
>> make
Just to confirm, I built BDB 4.7.25 with the above options (except uniquenames
and i686-suse-linux) on dual-core x86-64 and still see no hang.
OK. On my single core x86 (32 bit) SuSE system (also i686-suse-linux) with all
of the above options I see the same hang. It also occurs with just the
defaults. It also occurs when configuring --with-mutex=POSIX/pthreads. This
may be a BDB bug; probably should stick to 4.6.21 for single-core machines
until we track down the problem.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
5552
days inactive
5555
days old
18 comments
6 participants
participants (6)
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Aaron Richton -
Dieter Kluenter -
Howard Chu -
Michael Ströder -
Philip Guenther -
Quanah Gibson-Mount