#21743 [Asn]: Driver initialization failed for handler: db3 (and db2)

ID: 21743 Updated by: helly@php.net Reported By: priyadi@priyadi.net Status: Assigned Bug Type: DBM/DBA related Operating System: RedHat Linux 7.2 PHP Version: 4.3.0 Assigned To: helly New Comment: Please update: ext/dba/config.m4 This fixes some problems when linking against a specific library version. If you do not use your systems default db library you must not include ndbm support since that is based on db1 which in turn is db-1.85 or based on db-x where x is 1.85 or x >= 2. I tried the following: - db-3.2 (not shared) and it works. - db-4.1.25 (shared/not shared) and it works. - db-3.3 from system rpm (not shared) and it works. - db-3.3 from source (shared) and it works So i will ask sleepycat for known problems and maybe disable shared dba in case of db-3.2. I missed to answer your question: db libraries *can* do file locking but we tell the library not to do so and use our own locking. To unalize your db4 problems: What extact version are you using (ldd) and which config (but ldd should be enough). Previous Comments: ------------------------------------------------------------------------ [2003-01-30 11:38:18] priyadi@priyadi.net I also encountered segfaults with db4 compiled with --with-db3=dir but not with db3 supplied by redhat. ------------------------------------------------------------------------ [2003-01-29 18:59:10] helly@php.net Called my contact at Berkeley and got the link to the 3.2 version. Now i am able to reproduce a segfault...I'll look into deeper ASAP ------------------------------------------------------------------------ [2003-01-26 23:49:22] priyadi@priyadi.net I've tested it with db3-3.3 (RedHat 7.3) and also experienced the same result :(. Older berkeley db sources can be obtained from http://rpmfind.net as SRPMSs. I've also uploaded my binary dba.so to http://priyadi.net/php/dba.so if that will help. It is compiled with --with-flatfile --with-cdb --with-db3. Compiled on a RedHat 7.2 system, and db3-3.2.9. ------------------------------------------------------------------------ [2003-01-26 08:01:02] helly@php.net I've reconfigured my system with shared dba and db3-3.3 and cannot reproduce you results. Hopefully i can get a copy of the db-3.2 source distrubution which is no longer online :-( ------------------------------------------------------------------------ [2003-01-26 00:21:47] priyadi@priyadi.net > First please try this (note the "-" after "c": > <? > dl("dba.so"); > $a = dba_open("test", "c-", "db3"); > ?> It is working! # php 2.php Content-type: text/html X-Powered-By: PHP/4.3.0 # ls -al test -rw-r--r-- 1 root root 8192 Jan 26 12:34 test # file test test: Berkeley DB (Btree, version 8, native byte-order) > Then please try if you can create and open an new file: > <? > dl("dba.so"); > $a = dba_open("test2", "n-", "db3"); > var_dump($a); > dba_close($a); > $b = dba_open("test2", "r-", "db3"); > var_dump($b); > dba_close($b); > ?> It is working... # php 3.php Content-type: text/html X-Powered-By: PHP/4.3.0 resource(1) of type (dba) resource(2) of type (dba) > after that: From your configure script: > --enable-dba=shared \ > --with-gdbm \ > --with-db3 \ > --with-cdb=/usr \ > --with-flatfile \ > > This means you cannot have db2. > However you found a problem here: --with-cdb always loads > the internal cdb support (so thanks here i've fixed > this part already in cvs). OK, while we are at this, it seems there is another related problem. --without-db3 (or db2, flatfile, and others too) doesn't seem to be working. configure will show that db3 will not be included (checking for Berkeley DB3 support... no), but it will still be included if it finds one on my system, and the resulting binary will not be linked to DB3 library as shown by ldd. And --without-flatfile (and maybe --without-cdb too) will cause undefined symbol error but I think you already know that :) > Could you try (with only db3, cdb and flatfile) > --enable-dba=shared \ > --with-db3 \ > --with-cdb \ > --with-flatfile \ Doesn't work. :( > Maybe you could also try db4 or db4.1 versions buy > --with-db3=/path/to/db4 for PHP 4.3 or --with-db4 for cvs versions. I'll get back to you later on this after I finally finished downloading and compiling (the sql worm thing is still wreaking havoc here) On a side note, ext/dba from PHP 4.2.1 works (phpize'ed), maybe because it doesn't have locking? Oh, is it possible that BerkeleyDB has its own locking mechanism that is conflicting with PHP's? Consider this scenario: - on dba_open, php locks the berkeley db file - php then handles opening the db file to berkeley db library - berkeley db tries to lock the file, but since it is already locked by php it will eventually time out From berkeley db documentation, it seems that it does its own locking. http://www.sleepycat.com/docs/ref/lock/intro.html ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/21743 -- Edit this bug report at http://bugs.php.net/?id=21743&edit=1