openldap-bugs September 2007

openldap-bugs@openldap.org

33 participants
179 discussions

Re: (ITS#5113) pcache returns incomplete results
by rhafer＠suse.de 07 Sep '07

07 Sep '07

On Donnerstag, 6. September 2007, ando(a)sys-net.it wrote: > rhafer(a)suse.de wrote: > > Hm, current HEAD first calls add_query, which adds the CachedQuery to the > > cache and after that calls cache_entries to add the entries of that Query > > to the cache. That means that query_containment already know about the > > Query before its result is completely cached. > > In RE23 it is just the other way arround (first cache_entries() then > > add_query()). > > I see two possible solution: > > > > 1. Switch back to the old behaviour. But I guess the change was made for > > a reason. I don't know that yet. Seems the change happend between r1.95 > > and r1.96 of pcache.c (log message: "Fix concurrency issues"). > > > > 2. Protect the cached query with an rw_lock. Writelock it while > > cache_entries() is executing and readlock it during searches. This would > > give us the behaviour that Ando suggested in the discussion of ITS#5112. > > (pcache would not try to cache the same search request mulitple times, > > but block the second request until the first one is cached and then > > answer it from the cache) > > +1 (if there's no drawback, of course) The only drawback (if it really is a drawback) is that subsequent clients will have to wait for the caching to be completed. Depending on the query that is being cached can take pretty long. On the other hand one can also view this as an advantage, as it save some network traffic between the proxy that the backend-server. :) -- Ralf

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(ITS#5126) Auto-generation of devel/admin on website
by ghenry＠OpenLDAP.org 07 Sep '07

07 Sep '07

Full_Name: Gavin Henry Version: OS: URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (212.159.59.85) Submitted by: ghenry Dear all, I would like http://www.openldap.org/devel/admin/ to be automatically generated once a week. Daily is too often and might catch a broken make or similar. We can discuss the best time of day to run the job. Thanks, Gavin.

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Re: (ITS#5124) segfault on modify operation by slurpd with rwm overlay
by ando＠sys-net.it 07 Sep '07

07 Sep '07

ando(a)sys-net.it wrote: > I'll check > if this could also happen with syncrepl, and try to figure out a > workaround. This is now fixed in HEAD and in re23. Please test. Thanks, p. Ing. Pierangelo Masarati OpenLDAP Core Team SysNet s.r.l. via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it --------------------------------------- Office: +39 02 23998309 Mobile: +39 333 4963172 Email: pierangelo.masarati(a)sys-net.it ---------------------------------------

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Re: (ITS#5124) segfault on modify operation by slurpd with rwm overlay
by ando＠sys-net.it 06 Sep '07

06 Sep '07

jclarke(a)linagora.com wrote: > We are using 2.3.37 for both master and slave, and have confirmed that > disactivating the rwm overlay in slapd.conf avoids the problem. The failure is related to the fact that you rewrite the bindDN; this tricks slapo-rwm(5) into failing to recognize that the operation is actually an update, resulting in a double free at cleanup. I'll check if this could also happen with syncrepl, and try to figure out a workaround. In the meanwhile you should be able to solve the problem by reworking the bindDN rewrite rules so that the updatedn is not rewritten. p. Ing. Pierangelo Masarati OpenLDAP Core Team SysNet s.r.l. via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it --------------------------------------- Office: +39 02 23998309 Mobile: +39 333 4963172 Email: pierangelo.masarati(a)sys-net.it ---------------------------------------

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Re: (ITS#5124) segfault on modify operation by slurpd with rwm overlay
by ando＠sys-net.it 06 Sep '07

06 Sep '07

jclarke(a)linagora.com wrote: > With a simple master/slave setup, and the rwm overlay activated for the bindDN > context, any modify operation made on the master, replicated with slurpd causes > the slave to crash. > > You will find below a backtrace of the slave when it crashes, and the > configuration files we're using on the master, the slave, an LDIF of the > contents of the directory are in the archive on ftp.openldap.org indicated in > the ITS. > > We are using 2.3.37 for both master and slave, and have confirmed that > disactivating the rwm overlay in slapd.conf avoids the problem. I'll try to look at your report, but let me note that slurpd is deprecated; since you're running OpenLDAP 2.3.37, you're strongly recommended to use syncrepl. p. Ing. Pierangelo Masarati OpenLDAP Core Team SysNet s.r.l. via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it --------------------------------------- Office: +39 02 23998309 Mobile: +39 333 4963172 Email: pierangelo.masarati(a)sys-net.it ---------------------------------------

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Re: (ITS#5113) pcache returns incomplete results
by ando＠sys-net.it 06 Sep '07

06 Sep '07

rhafer(a)suse.de wrote: > Hm, current HEAD first calls add_query, which adds the CachedQuery to the > cache and after that calls cache_entries to add the entries of that Query to > the cache. That means that query_containment already know about the Query > before its result is completely cached. > In RE23 it is just the other way arround (first cache_entries() then > add_query()). > I see two possible solution: > > 1. Switch back to the old behaviour. But I guess the change was made for a > reason. I don't know that yet. Seems the change happend between r1.95 and > r1.96 of pcache.c (log message: "Fix concurrency issues"). > > 2. Protect the cached query with an rw_lock. Writelock it while > cache_entries() is executing and readlock it during searches. This would give > us the behaviour that Ando suggested in the discussion of ITS#5112. (pcache > would not try to cache the same search request mulitple times, but block the > second request until the first one is cached and then answer it from the > cache) +1 (if there's no drawback, of course) p. Ing. Pierangelo Masarati OpenLDAP Core Team SysNet s.r.l. via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it --------------------------------------- Office: +39 02 23998309 Mobile: +39 333 4963172 Email: pierangelo.masarati(a)sys-net.it ---------------------------------------

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Re: (ITS#5113) pcache returns incomplete results
by rhafer＠suse.de 06 Sep '07

06 Sep '07

On Mittwoch, 29. August 2007, Howard Chu wrote: > rhafer(a)suse.de wrote: > > Full_Name: Ralf Haferkamp > > Version: HEAD > > OS: > > URL: ftp://ftp.openldap.org/incoming/ > > Submission from: (NULL) (89.166.180.39) > > > > > > While the results of a query are being cached, slapo-pcache will answer > > queries that match the same template from the cache that is currently > > being populated. This means that subsequent queries will get incomplete > > results until the original query is completely cached. > > I don't see how that is possible. The query-in-progress isn't added to the > cache until the final result is received. Until then, query_containment > should not know anything is there to answer with. Hm, current HEAD first calls add_query, which adds the CachedQuery to the cache and after that calls cache_entries to add the entries of that Query to the cache. That means that query_containment already know about the Query before its result is completely cached. In RE23 it is just the other way arround (first cache_entries() then add_query()). I see two possible solution: 1. Switch back to the old behaviour. But I guess the change was made for a reason. I don't know that yet. Seems the change happend between r1.95 and r1.96 of pcache.c (log message: "Fix concurrency issues"). 2. Protect the cached query with an rw_lock. Writelock it while cache_entries() is executing and readlock it during searches. This would give us the behaviour that Ando suggested in the discussion of ITS#5112. (pcache would not try to cache the same search request mulitple times, but block the second request until the first one is cached and then answer it from the cache) -- Ralf

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(ITS#5124) segfault on modify operation by slurpd with rwm overlay
by jclarke＠linagora.com 05 Sep '07

05 Sep '07

Full_Name: Jonathan Clarke Version: 2.3.37 OS: Debian Etch URL: ftp://ftp.openldap.org/incoming/jclarke-slurpd-rwm-modify-bug.tar.gz Submission from: (NULL) (134.157.159.100) Hello guys, With a simple master/slave setup, and the rwm overlay activated for the bindDN context, any modify operation made on the master, replicated with slurpd causes the slave to crash. You will find below a backtrace of the slave when it crashes, and the configuration files we're using on the master, the slave, an LDIF of the contents of the directory are in the archive on ftp.openldap.org indicated in the ITS. We are using 2.3.37 for both master and slave, and have confirmed that disactivating the rwm overlay in slapd.conf avoids the problem. Thanks in advance for your help ! Jon ***** BACKTRACE ****** conn=0 fd=14 ACCEPT from IP=127.0.0.1:57752 (IP=0.0.0.0:392) [New Thread 32771 (LWP 21187)] conn=0 op=0 BIND dn="uid=replicator,dc=linagora,dc=org" method=128 conn=0 op=0 BIND dn="uid=replicator,dc=linagora,dc=org" mech=SIMPLE ssf=0 conn=0 op=0 RESULT tag=97 err=0 text= conn=0 op=1 MOD dn="dc=linagora,dc=org" conn=0 op=1 MOD attr=description entryCSN modifiersName modifyTimestamp conn=0 op=1 RESULT tag=103 err=0 text= Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 32771 (LWP 21187)] 0x4035dafb in free () from /lib/libc.so.6 (gdb) bt #0 0x4035dafb in free () from /lib/libc.so.6 #1 0x4035f805 in malloc () from /lib/libc.so.6 #2 0x0813e70f in ber_memalloc_x (s=1, ctx=0x40412660) at memory.c:226 #3 0x08079fa8 in ch_malloc (size=16) at ch_malloc.c:54 #4 0x08101567 in rwm_op_modify (op=0x8246fc0, rs=0x6301dce4) at rwm.c:590 #5 0x080b6c5e in overlay_op_walk (op=0x8246fc0, rs=0x6301dce4, which=op_modify, oi=0x81e9688, on=0x81e9778) at backover.c:639 #6 0x080b70ce in over_op_func (op=0x8246fc0, rs=0x6301dce4, which=op_modify) at backover.c:701 #7 0x08077e00 in do_modify (op=0x8246fc0, rs=0x6301dce4) at modify.c:200 #8 0x080609bb in connection_operation (ctx=0x6301dd58, arg_v=0x8246fc0) at connection.c:1133 #9 0x0811a8b4 in ldap_int_thread_pool_wrapper (xpool=0x81d0000) at tpool.c:478 #10 0x402adc51 in pthread_start_thread () from /lib/libpthread.so.0 #11 0x402addb4 in pthread_start_thread_event () from /lib/libpthread.so.0 #12 0x403b438a in clone () from /lib/libc.so.6 ***** End of backtrace *****

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Re: (ITS#5123) slaptest is not checking spelling of keyword access
by ando＠sys-net.it 05 Sep '07

05 Sep '07

lwartha(a)gmail.com wrote: > I made stupid typo and use word acces instead of access in slapd.confl. > Unforutnately slaptest -u does not display any notice about it and display > config file testing succeeded. Because up to 2.3 OpenLDAP didn't care about unrecognized statements. If you run staptest with -dconfig you'll notice warnings (if you're debugging slapd.conf you should; it is not the default because in most cases people are only interested in a yes/no question; ITS#4930 was filed to even remove the "success string"). > > This of cause takes lot of investigation to find it. > > Thanks for fixing it in the future. It's been changed in 2.4 ever since. Now all errors, including unrecognized statements, cause a bailout. p. Ing. Pierangelo Masarati OpenLDAP Core Team SysNet s.r.l. via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it --------------------------------------- Office: +39 02 23998309 Mobile: +39 333 4963172 Email: pierangelo.masarati(a)sys-net.it ---------------------------------------

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(ITS#5123) slaptest is not checking spelling of keyword access
by lwartha＠gmail.com 05 Sep '07

05 Sep '07

Full_Name: Ladislav Wartha Version: 2.3.27-4 OS: Fedora Core release 6 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (195.122.198.222) Hi, I made stupid typo and use word acces instead of access in slapd.confl. Unforutnately slaptest -u does not display any notice about it and display config file testing succeeded. This of cause takes lot of investigation to find it. Thanks for fixing it in the future. Best regards, Ladislav

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openldap-bugs September 2007