[rt-users] Perl malloc issues
Gary Holmes
Gary.Holmes at surfcontrol.com
Wed Mar 16 12:11:58 EST 2005
OK folks.
I tracked this down some more. The error was coming from the MySQL
client library, not perl.
Upgrading to 4.1.10a has fixed the problem.
Hope this helps someone.
Gary
> -----Original Message-----
> From: rt-users-bounces at lists.bestpractical.com
> [mailto:rt-users-bounces at lists.bestpractical.com] On Behalf
> Of Gary Holmes
> Sent: 25 February 2005 12:04
> To: rt-users at lists.bestpractical.com
> Subject: [rt-users] Perl malloc issues
>
> Hi,
>
> We've finally got RT 3.4.1 running on the following:
>
> - Dual processor Dell PE1850, 2 x 2.8Ghz Xeon
> - 2GB mem, 73 GB of RAID 1 SCSI disk
> - Fedora Core 3 - all updates applied thru 2/24/05
> - Apache 2
> - Perl 5.8.5 (same happens on 5.8.6)
> - All modules at latest rev
> - DBIx::Searchbuilder 1.22
>
> The system is loaded with tickets from our old 2.0.13 system
> OK. Normal
> functioning in nearly all respects.
>
> During the install process I was unable to do an incremental
> update due
> to a perl glibc malloc error in the dumpfile-to-rt3 script. Also, I
> cannot run rt-crontool for the same reason:
>
> [root at hermes bin]# /usr/bin/perl ./rt-crontool --help
> *** glibc detected *** malloc(): memory corruption: 0x094dd118 ***
> Aborted
>
> The failure appears to be in DBD::mysql --
>
> ** THIS IS WITH A LOCALLY COMPILED perl 5.8.6:
>
> [root at hermes ~]# cd /opt/rt3/bin
> [root at hermes bin]# gdb /opt/perl/bin/perl
> GNU gdb Red Hat Linux (6.1post-1.20040607.43rh)
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public
> License, and you
> are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for
> details.
> This GDB was configured as "i386-redhat-linux-gnu"...Using host
> libthread_db library "/lib/tls/libthread_db.so.1".
>
> (gdb) run ./rt-crontool --help
> Starting program: /opt/perl/bin/perl ./rt-crontool --help
> *** glibc detected *** malloc(): memory corruption: 0x0ac81518 ***
>
> Program received signal SIGABRT, Aborted.
> 0x00b637a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
> (gdb) where
> #0 0x00b637a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
> #1 0x00ba3955 in raise () from /lib/tls/libc.so.6
> #2 0x00ba5319 in abort () from /lib/tls/libc.so.6
> #3 0x00bd6f9a in __libc_message () from /lib/tls/libc.so.6
> #4 0x00bde0c6 in _int_malloc () from /lib/tls/libc.so.6
> #5 0x00bdfbd1 in malloc () from /lib/tls/libc.so.6
> #6 0x004d8e2e in my_malloc ()
> from
> /opt/perl/lib/site_perl/5.8.6/i386-linux/auto/DBD/mysql/mysql.so
> #7 0x004da242 in alloc_root ()
> from
> /opt/perl/lib/site_perl/5.8.6/i386-linux/auto/DBD/mysql/mysql.so
> #8 0x004e9515 in unpack_fields ()
> from
> /opt/perl/lib/site_perl/5.8.6/i386-linux/auto/DBD/mysql/mysql.so
> #9 0x004eb2a5 in cli_read_query_result ()
> from
> /opt/perl/lib/site_perl/5.8.6/i386-linux/auto/DBD/mysql/mysql.so
> #10 0x004eb390 in mysql_real_query ()
> from
> /opt/perl/lib/site_perl/5.8.6/i386-linux/auto/DBD/mysql/mysql.so
> #11 0x004cdfce in mysql_st_internal_execute (h=0xa600b7c,
> statement=0x0,
> attribs=0x0,
> numParams=1, params=0xabe67c8, cdaPtr=0xabfc2b4, svsock=0xac75d8c,
> use_mysql_use_result=0)
> at dbdimp.c:1620
> #12 0x004ce71b in mysql_st_execute (sth=0xa600b7c,
> imp_sth=0xabfc248) at
> dbdimp.c:1690
> #13 0x004d0c1a in XS_DBD__mysql__st_execute (cv=0xa5ff91c) at
> mysql.xsi:548
> #14 0x00f3e8f4 in XS_DBI_dispatch (cv=0xa2a3844) at DBI.xs:2656
> #15 0x00e57c4d in Perl_pp_entersub () at pp_hot.c:2890
> #16 0x00e3ef5c in Perl_runops_debug () at dump.c:1449
> #17 0x00df7a0a in perl_run (my_perl=0x9a05008) at perl.c:1934
> #18 0x0804922a in main (argc=0, argv=0x0, env=0xbfeef154) at
> perlmain.c:98
>
> SAME THING WITH STOCK perl 5.8.5:
>
> [root at hermes bin]# gdb /usr/bin/perl
> GNU gdb Red Hat Linux (6.1post-1.20040607.43rh)
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public
> License, and you
> are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for
> details.
> This GDB was configured as "i386-redhat-linux-gnu"...(no debugging
> symbols found)...Using host libthread_db library
> "/lib/tls/libthread_db.so.1".
>
> (gdb) run ./rt-crontool --help
> Starting program: /usr/bin/perl ./rt-crontool --help
> (no debugging symbols found)...(no debugging symbols found)...(no
> debugging symbols found)...(nodebugging symbols found)...(no debugging
> symbols found)...(no debugging symbols found)...(no debugging symbols
> found)...[Thread debugging using libthread_db enabled]
> [New Thread -1208285504 (LWP 7655)]
> (no debugging symbols found)...(no debugging symbols found)...(no
> debugging symbols found)...(nodebugging symbols found)...(no debugging
> symbols found)...(no debugging symbols found)...*** glibc detected ***
> malloc(): memory corruption: 0x0a041fc8 ***
>
> Program received signal SIGABRT, Aborted.
> [Switching to Thread -1208285504 (LWP 7655)]
> 0x00b637a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
> (gdb) where
> #0 0x00b637a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
> #1 0x00ba3955 in raise () from /lib/tls/libc.so.6
> #2 0x00ba5319 in abort () from /lib/tls/libc.so.6
> #3 0x00bd6f9a in __libc_message () from /lib/tls/libc.so.6
> #4 0x00bde0c6 in _int_malloc () from /lib/tls/libc.so.6
> #5 0x00bdfbd1 in malloc () from /lib/tls/libc.so.6
> #6 0x0021e94e in my_malloc ()
> from
> /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DB
> D/mysql/my
> sql.so
> #7 0x0021fd62 in alloc_root ()
> from
> /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DB
> D/mysql/my
> sql.so
> #8 0x0022f035 in unpack_fields ()
> from
> /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DB
> D/mysql/my
> sql.so
> #9 0x00230dc5 in cli_read_query_result ()
> from
> /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DB
> D/mysql/my
> sql.so
> #10 0x00230eb0 in mysql_real_query ()
> from
> /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DB
> D/mysql/my
> sql.so
> #11 0x0020e755 in mysql_st_internal_execute (h=0x99bec00,
> statement=0x2d, attribs=0x0,
> numParams=1, params=0xa008c30, cdaPtr=0x9fb8954, svsock=0xa034c34,
> use_mysql_use_result=0)
> at dbdimp.c:1620
> #12 0x0020effa in mysql_st_execute (sth=0x99bec00,
> imp_sth=0x9fb88e8) at
> dbdimp.c:1690
> #13 0x002138d4 in XS_DBD__mysql__st_execute (my_perl=0x8c33008,
> cv=0x99bd73c) at mysql.xsi:505
> #14 0x0018a9fb in XS_DBI_dispatch ()
> from
> /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi/auto/
> DBI/DBI.so
> #15 0x056f1a62 in Perl_pp_entersub ()
> from /usr/lib/perl5/5.8.5/i386-linux-thread-multi/CORE/libperl.so
> #16 0x056d4e1d in Perl_runops_debug ()
> from /usr/lib/perl5/5.8.5/i386-linux-thread-multi/CORE/libperl.so
> #17 0x05686c41 in perl_run () from
> /usr/lib/perl5/5.8.5/i386-linux-thread-multi/CORE/libperl.so
> #18 0x080493a2 in main ()
>
> Using the MALLOC_CHECK_ environment variable doesn't help.
>
> Is this some thread safety issue? Anyone else seeing anything like it?
>
> Thanks,
> Gary
>
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