openldap-bugs October 2013

openldap-bugs@openldap.org

25 participants
95 discussions

Re: (ITS#7713) Segmentation fault if the pagesize of the Operating system is not equal to 4096.
by sumantk2＠linux.vnet.ibm.com 01 Oct '13

01 Oct '13

On 10/01/2013 12:46 PM, Howard Chu wrote: > sumantk2(a)linux.vnet.ibm.com wrote: >> Full_Name: sumanth k >> Version: 2.4.35 to any recent version with mdb support >> OS: Linux - ppc64 >> URL: ftp://ftp.openldap.org/incoming/ >> Submission from: (NULL) (122.248.161.59) >> >> >> The pagesize of Linux for x86 and s390x architecture is 4096. Whereas >> in Powerpc >> <ppc64> , the pagesize is by default 65536. So when the pagesize is >> not equal to >> 4096, the segmentation fault occurs. So tried to compile the >> powerpc64 kernel >> with page size of 4096 and the problem disappears and runs smoothly. >> But by >> default the powerpc64 architecture runs with 65536 pagesize . So >> there is some >> problem in mdb_env_open2() function in mdb.c when the pagesize is not >> equal to >> 4096. > > Thanks for the report. I believe you should be able to instead change > the definition of MDB_PAGESIZE to 65536, instead of forcing your > machine to use 4096 byte pages. > Yes i have tried changing MDB_PAGESIZE to 65536 before reporting this and the segmentation fault still occured. > There are other problems though; we use an unsigned short for page > offsets. I'm not sure the assert that you tripped will succeed in this > case. > Will try changing datatype and see ..But not sure whether it affects some other part of the code. >> >> These are my observations : >> >> >> Compiled the source with -O0 optimization . >> /home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 -f >> /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h >> ldap://localhost:9011/ -d >> 0x4105 >> >> ./scripts/test000-rootdse: line 31: 19059 Aborted >> (core dumped) >> $SLAPD -f $CONF1 -h $URI1 -d $LVL $TIMING > $LOG1 2>&1 >> >> Core file : >> bash-4.2# cat .gdbinit >> b mdb_db_open >> b mdb_env_open >> b mdb_env_open2 >> b mdb_txn_begin >> b mdb_txn_renew0 >> b mdb_dbi_open >> b mdb_cursor_init >> b mdb_cursor_set >> b mdb_page_search >> b mdb_page_get >> b mdb_page_search_root >> r -s0 -f /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h >> ldap://localhost:9011/ -d 0x4105 >> >> >> # Core was generated by >> `/home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 >> -f /home/openldap-2.4.36'. >> Program terminated with signal 6, Aborted. >> #0 0x00001fffff7adb70 in .raise () from /lib64/libc.so.6 >> Missing separate debuginfos, use: debuginfo-install >> cyrus-sasl-lib-2.1.26-8.mcp8_0.2.ppc64 >> cyrus-sasl-md5-2.1.26-8.mcp8_0.2.ppc64 >> glibc-2.17-4.mcp8_0.6.ppc64 keyutils-libs-1.5.5-4.mcp8_0.2.ppc64 >> krb5-libs-1.11.3-1.mcp8_0.2.ppc64 libcom_err-1.42.7-2.mcp8_0.1.ppc64 >> libdb-5.3.21-8.mcp8_0.4.ppc64 libselinux-2.1.13-15.mcp8_0.3.ppc64 >> nss-softokn-freebl-3.14.3-1.mcp8_0.2.ppc64 >> openssl-libs-1.0.1e-4.mcp8_0.1.ppc64 >> pcre-8.32-7.mcp8_0.2.ppc64 zlib-1.2.7-10.mcp8_0.1.ppc64 >> (gdb) where >> #0 0x00001fffff7adb70 in .raise () from /lib64/libc.so.6 >> #1 0x00001fffff7afb64 in .abort () from /lib64/libc.so.6 >> #2 0x00001fffff7a455c in .__assert_fail_base () from /lib64/libc.so.6 >> #3 0x00001fffff7a464c in .__assert_fail () from /lib64/libc.so.6 >> #4 0x00000000101498cc in mdb_node_add (mc=0x3fffe89a7d40, indx=0, >> key=0x3fffe89a7d20, data=0x3fffe89a7d30, pgno=0, flags=2) at >> ./../../../libraries/liblmdb/mdb.c:6160 >> #5 0x000000001014882c in mdb_cursor_put (mc=0x3fffe89a7d40, >> key=0x3fffe89a7d20, >> data=0x3fffe89a7d30, flags=2) at ./../../../libraries/liblmdb/mdb.c:5877 >> #6 0x00000000101516a8 in mdb_dbi_open (txn=0x1000f675980, >> name=0x1027b9c8 >> "ad2i", flags=262152, dbi=0x1fffff0800a0) at >> ./../../../libraries/liblmdb/mdb.c:7902 >> #7 0x0000000010139cd4 in mdb_db_open (be=0x1000f4f83a0, >> cr=0x3fffe89a81c0) at >> init.c:207 >> #8 0x0000000010050e34 in backend_startup_one (be=0x1000f4f83a0, >> cr=0x3fffe89a81c0) at backend.c:224 >> #9 0x0000000010051588 in backend_startup (be=0x1000f4f83a0) at >> backend.c:325 >> #10 0x0000000010089a7c in slap_startup (be=0x0) at init.c:219 >> #11 0x000000001000a9c8 in main (argc=8, argv=0x3fffe89a8958) at >> main.c:991 >> >> >> >> Here is the error message : >> >> #/home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 -f >> /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h >> ldap://localhost:9011/ -d >> 0x4105 >> (...some messages...) >> 524a2fe1 mdb_db_open: database "o=OpenLDAP Project,l=Internet": >> dbenv_open(/home/openldap-2.4.36/tests/testrun/db.1.a). >> slapd: ./../../../libraries/liblmdb/mdb.c:6160: mdb_node_add: Assertion >> `mp->mp_pb.pb.pb_upper >= mp->mp_pb.pb.pb_lower' failed. < === fails >> in assert() >> ; >> Aborted (core dumped) >> >> >> >> Some of my observation : >> >> in this file libraries/liblmdb/mdb.c >> in X86 : rc = mdb_cursor_set(&mc, &key, &data, MDB_SET, &exact); the >> value of >> rc = MD_SUCCESS, but for ppc64 it is MDB_NOTFOUND. This is due to the >> fact that >> md_root != 2 >> >> The value of md_root=2 for env->me_metas[1]->mm_dbs in X86 , but some >> huge value >> in ppc64. The value of md_pad = 4096 in x86 and 65536 in ppc64 . >> >> in x86: >> >> Breakpoint 2, mdb_txn_begin (env=0x9c5050, parent=0x0, flags=0, >> ret=0x7fffffffdf98) at ./../../../libraries/liblmdb/mdb.c:2219 >> 2219 int rc, size, tsize = sizeof(MDB_txn); >> (gdb) p env->me_metas[1]->mm_dbs >> $1 = {{md_pad = 4096, md_flags = 8, md_depth = 0, md_branch_pages = 0, >> md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = >> 18446744073709551615}, {md_pad = 0, md_flags = 0, >> md_depth = 1, md_branch_pages = 0, md_leaf_pages = 1, >> md_overflow_pages = 0, >> md_entries = 4, md_root = 2}} >> (gdb) p env->me_metas[0]->mm_dbs >> $2 = {{md_pad = 4096, md_flags = 8, md_depth = 0, md_branch_pages = 0, >> md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = >> 18446744073709551615}, {md_pad = 0, md_flags = 0, >> md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, >> md_overflow_pages = 0, >> md_entries = 0, md_root = 18446744073709551615}} >> >> >> in ppc64: >> >> Breakpoint 2, mdb_txn_begin (env=0x10493ef0, parent=0x0, flags=0, >> ret=0x3fffffffe590) at ./../../../libraries/liblmdb/mdb.c:2219 >> 2219 int rc, size, tsize = sizeof(MDB_txn); >> (gdb) p env->me_metas[0]->mm_dbs >> $1 = {{md_pad = 65536, md_flags = 8, md_depth = 0, md_branch_pages = 0, >> md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = >> 18446744073709551615}, {md_pad = 0, md_flags = 0, >> md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, >> md_overflow_pages = 0, >> md_entries = 0, md_root = 18446744073709551615}} >> (gdb) p env->me_metas[1]->mm_dbs >> $2 = {{md_pad = 65536, md_flags = 8, md_depth = 0, md_branch_pages = 0, >> md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = >> 18446744073709551615}, {md_pad = 0, md_flags = 0, >> md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, >> md_overflow_pages = 0, >> md_entries = 0, md_root = 18446744073709551615}} >> >> >> >> >> # From further investigation , the value of env->me_metas[1] is >> initialized in >> mdb_env_open2() at : >> >> p = (MDB_page *)env->me_map; >> env->me_metas[0] = METADATA(p); >> env->me_metas[1] = (MDB_meta *)((char *)env->me_metas[0] + >> meta.mm_psize); >> >> Here the meta.mm_psize in ppc64 is 65536 , hence there is some >> problem.. If the >> value of meta.mm_psize is 4096 , then everything works fine. >> >> >> As i dont have deep knowledge in openldap ,some help is needed. >> >> Thank you, >> Sumanth K >> >> > >

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Re: (ITS#7710) contextCSN values not updated by internal non-replicated ops
by hyc＠symas.com 01 Oct '13

01 Oct '13

Michael Ströder wrote: > hyc(a)symas.com wrote: >>> Configuration: >>> - MMR with 3 nodes and normal syncrepl. >>> - slapo-memberof used to populate/update attribute 'memberOf' in user entries. >>> >>> If a group entry is modified and slapo-memberof updates the attribute 'memberOf' >>> in the member's entry the contextCSN value of the server where the LDAP request >>> was sent to is not updated on the other MMR replicas. >> >> I don't understand this sentence, can you rephrase? > > I looked into this a bit more: > > We have three MMR nodes, let's simply enumerate them as 1, 2 and 3. > > When modifying a group entry on 1 'memberOf' gets *locally* updated and the > contextCSN value for server 1 gets also updated. So far so good. > > Now the group modification are pulled by 2 and 3 and slapo-memberof installed > there *locally* updates attr memberOf and the *local* contextCSN value for 2 > and 3 are updated with new timestamp. But the updated contextCSN values of 2 > and 3 never get replicated to the other instances! So my monitoring check > shows a long-lasting replication gap. After next server restart all contextCSN > values get updated. > >> Also see ITS#6915. > > Sorry, glancing over ITS#6915 I don't understand what it means in this context. The point of #6915 is that internal ops are not supposed to affect the contextCSN. If you're seeing new contextCSNs on 2 and 3 solely due to slapo-memberof then some part of #6915 is still broken. We'll need a duplicate setup to reproduce this... -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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Re: (ITS#7710) contextCSN values not updated by internal non-replicated ops
by michael＠stroeder.com 01 Oct '13

01 Oct '13

hyc(a)symas.com wrote: >> Configuration: >> - MMR with 3 nodes and normal syncrepl. >> - slapo-memberof used to populate/update attribute 'memberOf' in user entries. >> >> If a group entry is modified and slapo-memberof updates the attribute 'memberOf' >> in the member's entry the contextCSN value of the server where the LDAP request >> was sent to is not updated on the other MMR replicas. > > I don't understand this sentence, can you rephrase? I looked into this a bit more: We have three MMR nodes, let's simply enumerate them as 1, 2 and 3. When modifying a group entry on 1 'memberOf' gets *locally* updated and the contextCSN value for server 1 gets also updated. So far so good. Now the group modification are pulled by 2 and 3 and slapo-memberof installed there *locally* updates attr memberOf and the *local* contextCSN value for 2 and 3 are updated with new timestamp. But the updated contextCSN values of 2 and 3 never get replicated to the other instances! So my monitoring check shows a long-lasting replication gap. After next server restart all contextCSN values get updated. > Also see ITS#6915. Sorry, glancing over ITS#6915 I don't understand what it means in this context. Ciao, Michael.

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Re: (ITS#7713) Segmentation fault if the pagesize of the Operating system is not equal to 4096.
by hyc＠symas.com 01 Oct '13

01 Oct '13

sumantk2(a)linux.vnet.ibm.com wrote: > Full_Name: sumanth k > Version: 2.4.35 to any recent version with mdb support > OS: Linux - ppc64 > URL: ftp://ftp.openldap.org/incoming/ > Submission from: (NULL) (122.248.161.59) > > > The pagesize of Linux for x86 and s390x architecture is 4096. Whereas in Powerpc > <ppc64> , the pagesize is by default 65536. So when the pagesize is not equal to > 4096, the segmentation fault occurs. So tried to compile the powerpc64 kernel > with page size of 4096 and the problem disappears and runs smoothly. But by > default the powerpc64 architecture runs with 65536 pagesize . So there is some > problem in mdb_env_open2() function in mdb.c when the pagesize is not equal to > 4096. Thanks for the report. I believe you should be able to instead change the definition of MDB_PAGESIZE to 65536, instead of forcing your machine to use 4096 byte pages. There are other problems though; we use an unsigned short for page offsets. I'm not sure the assert that you tripped will succeed in this case. > > These are my observations : > > > Compiled the source with -O0 optimization . > /home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 -f > /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h ldap://localhost:9011/ -d > 0x4105 > > ./scripts/test000-rootdse: line 31: 19059 Aborted (core dumped) > $SLAPD -f $CONF1 -h $URI1 -d $LVL $TIMING > $LOG1 2>&1 > > Core file : > bash-4.2# cat .gdbinit > b mdb_db_open > b mdb_env_open > b mdb_env_open2 > b mdb_txn_begin > b mdb_txn_renew0 > b mdb_dbi_open > b mdb_cursor_init > b mdb_cursor_set > b mdb_page_search > b mdb_page_get > b mdb_page_search_root > r -s0 -f /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h > ldap://localhost:9011/ -d 0x4105 > > > # Core was generated by `/home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 > -f /home/openldap-2.4.36'. > Program terminated with signal 6, Aborted. > #0 0x00001fffff7adb70 in .raise () from /lib64/libc.so.6 > Missing separate debuginfos, use: debuginfo-install > cyrus-sasl-lib-2.1.26-8.mcp8_0.2.ppc64 cyrus-sasl-md5-2.1.26-8.mcp8_0.2.ppc64 > glibc-2.17-4.mcp8_0.6.ppc64 keyutils-libs-1.5.5-4.mcp8_0.2.ppc64 > krb5-libs-1.11.3-1.mcp8_0.2.ppc64 libcom_err-1.42.7-2.mcp8_0.1.ppc64 > libdb-5.3.21-8.mcp8_0.4.ppc64 libselinux-2.1.13-15.mcp8_0.3.ppc64 > nss-softokn-freebl-3.14.3-1.mcp8_0.2.ppc64 openssl-libs-1.0.1e-4.mcp8_0.1.ppc64 > pcre-8.32-7.mcp8_0.2.ppc64 zlib-1.2.7-10.mcp8_0.1.ppc64 > (gdb) where > #0 0x00001fffff7adb70 in .raise () from /lib64/libc.so.6 > #1 0x00001fffff7afb64 in .abort () from /lib64/libc.so.6 > #2 0x00001fffff7a455c in .__assert_fail_base () from /lib64/libc.so.6 > #3 0x00001fffff7a464c in .__assert_fail () from /lib64/libc.so.6 > #4 0x00000000101498cc in mdb_node_add (mc=0x3fffe89a7d40, indx=0, > key=0x3fffe89a7d20, data=0x3fffe89a7d30, pgno=0, flags=2) at > ./../../../libraries/liblmdb/mdb.c:6160 > #5 0x000000001014882c in mdb_cursor_put (mc=0x3fffe89a7d40, key=0x3fffe89a7d20, > data=0x3fffe89a7d30, flags=2) at ./../../../libraries/liblmdb/mdb.c:5877 > #6 0x00000000101516a8 in mdb_dbi_open (txn=0x1000f675980, name=0x1027b9c8 > "ad2i", flags=262152, dbi=0x1fffff0800a0) at > ./../../../libraries/liblmdb/mdb.c:7902 > #7 0x0000000010139cd4 in mdb_db_open (be=0x1000f4f83a0, cr=0x3fffe89a81c0) at > init.c:207 > #8 0x0000000010050e34 in backend_startup_one (be=0x1000f4f83a0, > cr=0x3fffe89a81c0) at backend.c:224 > #9 0x0000000010051588 in backend_startup (be=0x1000f4f83a0) at backend.c:325 > #10 0x0000000010089a7c in slap_startup (be=0x0) at init.c:219 > #11 0x000000001000a9c8 in main (argc=8, argv=0x3fffe89a8958) at main.c:991 > > > > Here is the error message : > > #/home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 -f > /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h ldap://localhost:9011/ -d > 0x4105 > (...some messages...) > 524a2fe1 mdb_db_open: database "o=OpenLDAP Project,l=Internet": > dbenv_open(/home/openldap-2.4.36/tests/testrun/db.1.a). > slapd: ./../../../libraries/liblmdb/mdb.c:6160: mdb_node_add: Assertion > `mp->mp_pb.pb.pb_upper >= mp->mp_pb.pb.pb_lower' failed. < === fails in assert() > ; > Aborted (core dumped) > > > > Some of my observation : > > in this file libraries/liblmdb/mdb.c > in X86 : rc = mdb_cursor_set(&mc, &key, &data, MDB_SET, &exact); the value of > rc = MD_SUCCESS, but for ppc64 it is MDB_NOTFOUND. This is due to the fact that > md_root != 2 > > The value of md_root=2 for env->me_metas[1]->mm_dbs in X86 , but some huge value > in ppc64. The value of md_pad = 4096 in x86 and 65536 in ppc64 . > > in x86: > > Breakpoint 2, mdb_txn_begin (env=0x9c5050, parent=0x0, flags=0, > ret=0x7fffffffdf98) at ./../../../libraries/liblmdb/mdb.c:2219 > 2219 int rc, size, tsize = sizeof(MDB_txn); > (gdb) p env->me_metas[1]->mm_dbs > $1 = {{md_pad = 4096, md_flags = 8, md_depth = 0, md_branch_pages = 0, > md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = > 18446744073709551615}, {md_pad = 0, md_flags = 0, > md_depth = 1, md_branch_pages = 0, md_leaf_pages = 1, md_overflow_pages = 0, > md_entries = 4, md_root = 2}} > (gdb) p env->me_metas[0]->mm_dbs > $2 = {{md_pad = 4096, md_flags = 8, md_depth = 0, md_branch_pages = 0, > md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = > 18446744073709551615}, {md_pad = 0, md_flags = 0, > md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, > md_entries = 0, md_root = 18446744073709551615}} > > > in ppc64: > > Breakpoint 2, mdb_txn_begin (env=0x10493ef0, parent=0x0, flags=0, > ret=0x3fffffffe590) at ./../../../libraries/liblmdb/mdb.c:2219 > 2219 int rc, size, tsize = sizeof(MDB_txn); > (gdb) p env->me_metas[0]->mm_dbs > $1 = {{md_pad = 65536, md_flags = 8, md_depth = 0, md_branch_pages = 0, > md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = > 18446744073709551615}, {md_pad = 0, md_flags = 0, > md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, > md_entries = 0, md_root = 18446744073709551615}} > (gdb) p env->me_metas[1]->mm_dbs > $2 = {{md_pad = 65536, md_flags = 8, md_depth = 0, md_branch_pages = 0, > md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = > 18446744073709551615}, {md_pad = 0, md_flags = 0, > md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, > md_entries = 0, md_root = 18446744073709551615}} > > > > > # From further investigation , the value of env->me_metas[1] is initialized in > mdb_env_open2() at : > > p = (MDB_page *)env->me_map; > env->me_metas[0] = METADATA(p); > env->me_metas[1] = (MDB_meta *)((char *)env->me_metas[0] + meta.mm_psize); > > Here the meta.mm_psize in ppc64 is 65536 , hence there is some problem.. If the > value of meta.mm_psize is 4096 , then everything works fine. > > > As i dont have deep knowledge in openldap ,some help is needed. > > Thank you, > Sumanth K > > -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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(ITS#7713) Segmentation fault if the pagesize of the Operating system is not equal to 4096.
by sumantk2＠linux.vnet.ibm.com 30 Sep '13

30 Sep '13

Full_Name: sumanth k Version: 2.4.35 to any recent version with mdb support OS: Linux - ppc64 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (122.248.161.59) The pagesize of Linux for x86 and s390x architecture is 4096. Whereas in Powerpc <ppc64> , the pagesize is by default 65536. So when the pagesize is not equal to 4096, the segmentation fault occurs. So tried to compile the powerpc64 kernel with page size of 4096 and the problem disappears and runs smoothly. But by default the powerpc64 architecture runs with 65536 pagesize . So there is some problem in mdb_env_open2() function in mdb.c when the pagesize is not equal to 4096. These are my observations : Compiled the source with -O0 optimization . /home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 -f /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h ldap://localhost:9011/ -d 0x4105 ./scripts/test000-rootdse: line 31: 19059 Aborted (core dumped) $SLAPD -f $CONF1 -h $URI1 -d $LVL $TIMING > $LOG1 2>&1 Core file : bash-4.2# cat .gdbinit b mdb_db_open b mdb_env_open b mdb_env_open2 b mdb_txn_begin b mdb_txn_renew0 b mdb_dbi_open b mdb_cursor_init b mdb_cursor_set b mdb_page_search b mdb_page_get b mdb_page_search_root r -s0 -f /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h ldap://localhost:9011/ -d 0x4105 # Core was generated by `/home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 -f /home/openldap-2.4.36'. Program terminated with signal 6, Aborted. #0 0x00001fffff7adb70 in .raise () from /lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install cyrus-sasl-lib-2.1.26-8.mcp8_0.2.ppc64 cyrus-sasl-md5-2.1.26-8.mcp8_0.2.ppc64 glibc-2.17-4.mcp8_0.6.ppc64 keyutils-libs-1.5.5-4.mcp8_0.2.ppc64 krb5-libs-1.11.3-1.mcp8_0.2.ppc64 libcom_err-1.42.7-2.mcp8_0.1.ppc64 libdb-5.3.21-8.mcp8_0.4.ppc64 libselinux-2.1.13-15.mcp8_0.3.ppc64 nss-softokn-freebl-3.14.3-1.mcp8_0.2.ppc64 openssl-libs-1.0.1e-4.mcp8_0.1.ppc64 pcre-8.32-7.mcp8_0.2.ppc64 zlib-1.2.7-10.mcp8_0.1.ppc64 (gdb) where #0 0x00001fffff7adb70 in .raise () from /lib64/libc.so.6 #1 0x00001fffff7afb64 in .abort () from /lib64/libc.so.6 #2 0x00001fffff7a455c in .__assert_fail_base () from /lib64/libc.so.6 #3 0x00001fffff7a464c in .__assert_fail () from /lib64/libc.so.6 #4 0x00000000101498cc in mdb_node_add (mc=0x3fffe89a7d40, indx=0, key=0x3fffe89a7d20, data=0x3fffe89a7d30, pgno=0, flags=2) at ./../../../libraries/liblmdb/mdb.c:6160 #5 0x000000001014882c in mdb_cursor_put (mc=0x3fffe89a7d40, key=0x3fffe89a7d20, data=0x3fffe89a7d30, flags=2) at ./../../../libraries/liblmdb/mdb.c:5877 #6 0x00000000101516a8 in mdb_dbi_open (txn=0x1000f675980, name=0x1027b9c8 "ad2i", flags=262152, dbi=0x1fffff0800a0) at ./../../../libraries/liblmdb/mdb.c:7902 #7 0x0000000010139cd4 in mdb_db_open (be=0x1000f4f83a0, cr=0x3fffe89a81c0) at init.c:207 #8 0x0000000010050e34 in backend_startup_one (be=0x1000f4f83a0, cr=0x3fffe89a81c0) at backend.c:224 #9 0x0000000010051588 in backend_startup (be=0x1000f4f83a0) at backend.c:325 #10 0x0000000010089a7c in slap_startup (be=0x0) at init.c:219 #11 0x000000001000a9c8 in main (argc=8, argv=0x3fffe89a8958) at main.c:991 Here is the error message : #/home/openldap-2.4.36/tests/../servers/slapd/slapd -s0 -f /home/openldap-2.4.36/tests/testrun/slapd.1.conf -h ldap://localhost:9011/ -d 0x4105 (...some messages...) 524a2fe1 mdb_db_open: database "o=OpenLDAP Project,l=Internet": dbenv_open(/home/openldap-2.4.36/tests/testrun/db.1.a). slapd: ./../../../libraries/liblmdb/mdb.c:6160: mdb_node_add: Assertion `mp->mp_pb.pb.pb_upper >= mp->mp_pb.pb.pb_lower' failed. < === fails in assert() ; Aborted (core dumped) Some of my observation : in this file libraries/liblmdb/mdb.c in X86 : rc = mdb_cursor_set(&mc, &key, &data, MDB_SET, &exact); the value of rc = MD_SUCCESS, but for ppc64 it is MDB_NOTFOUND. This is due to the fact that md_root != 2 The value of md_root=2 for env->me_metas[1]->mm_dbs in X86 , but some huge value in ppc64. The value of md_pad = 4096 in x86 and 65536 in ppc64 . in x86: Breakpoint 2, mdb_txn_begin (env=0x9c5050, parent=0x0, flags=0, ret=0x7fffffffdf98) at ./../../../libraries/liblmdb/mdb.c:2219 2219 int rc, size, tsize = sizeof(MDB_txn); (gdb) p env->me_metas[1]->mm_dbs $1 = {{md_pad = 4096, md_flags = 8, md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = 18446744073709551615}, {md_pad = 0, md_flags = 0, md_depth = 1, md_branch_pages = 0, md_leaf_pages = 1, md_overflow_pages = 0, md_entries = 4, md_root = 2}} (gdb) p env->me_metas[0]->mm_dbs $2 = {{md_pad = 4096, md_flags = 8, md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = 18446744073709551615}, {md_pad = 0, md_flags = 0, md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = 18446744073709551615}} in ppc64: Breakpoint 2, mdb_txn_begin (env=0x10493ef0, parent=0x0, flags=0, ret=0x3fffffffe590) at ./../../../libraries/liblmdb/mdb.c:2219 2219 int rc, size, tsize = sizeof(MDB_txn); (gdb) p env->me_metas[0]->mm_dbs $1 = {{md_pad = 65536, md_flags = 8, md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = 18446744073709551615}, {md_pad = 0, md_flags = 0, md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = 18446744073709551615}} (gdb) p env->me_metas[1]->mm_dbs $2 = {{md_pad = 65536, md_flags = 8, md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = 18446744073709551615}, {md_pad = 0, md_flags = 0, md_depth = 0, md_branch_pages = 0, md_leaf_pages = 0, md_overflow_pages = 0, md_entries = 0, md_root = 18446744073709551615}} # From further investigation , the value of env->me_metas[1] is initialized in mdb_env_open2() at : p = (MDB_page *)env->me_map; env->me_metas[0] = METADATA(p); env->me_metas[1] = (MDB_meta *)((char *)env->me_metas[0] + meta.mm_psize); Here the meta.mm_psize in ppc64 is 65536 , hence there is some problem.. If the value of meta.mm_psize is 4096 , then everything works fine. As i dont have deep knowledge in openldap ,some help is needed. Thank you, Sumanth K

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openldap-bugs October 2013