[rt-users] Perl malloc issues

Fri Feb 25 07:03:52 EST 2005

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/DBD/mysql/my
sql.so
#7  0x0021fd62 in alloc_root ()
   from
/usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DBD/mysql/my
sql.so
#8  0x0022f035 in unpack_fields ()
   from
/usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DBD/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/DBD/mysql/my
sql.so
#10 0x00230eb0 in mysql_real_query ()
   from
/usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi/auto/DBD/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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