| Subject: | Intermittent deadlock on 35thrclone.t |
Old RHEL5.4 server needed new non-vendor DBI for SQLite, ran the test
pattern about 10 times, having 35thrclone.t hang twice:
t/zvp_35thrclone.t ..............
1..20
ok 1 - use DBI;
ok 2 - ... assignment of neat_maxlen was successful
ok 3 - The object isa DBI::db
ok 4 - ... DBI::neat_maxlen still holding its value
ok 5 - The object isa DBI::db
ok 6 - ... new $dbh is not the same instance as $dbh_parent
ok 7
ok 8 - ... DBI::neat_maxlen still holding its value
ok 9 - The object isa DBI::db
ok 10 - ... new $dbh is not the same instance as $dbh_parent
ok 11
ok 12 - ... DBI::neat_maxlen still holding its value
ok 13 - The object isa DBI::db
ok 14 - ... new $dbh is not the same instance as $dbh_parent
ok 15
ok 16 - ... DBI::neat_maxlen still holding its value
ok 17 - The object isa DBI::db
ok 18 - ... new $dbh is not the same instance as $dbh_parent
ok 19
First time was with "t/zvxgp_35thrclone.t ............ 1/20".
(gdb) where
#0 0x0000003584e0d174 in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x0000003584e08aca in _L_lock_1034 () from /lib64/libpthread.so.0
#2 0x0000003584e0898c in pthread_mutex_lock () from /lib64/
libpthread.so.0
#3 0x00002ad648ddf002 in Perl_ithread_hook () from /usr/lib64/
perl5/5.8.8/x86_64-linux-thread-multi/auto/threads/threads.so
#4 0x00000035856386cc in perl_destruct () from /usr/lib64/perl5/5.8.8/
x86_64-linux-thread-multi/CORE/libperl.so
#5 0x00002ad648ddfbcb in ?? () from /usr/lib64/perl5/5.8.8/x86_64-
linux-thread-multi/auto/threads/threads.so
#6 0x00002ad648ddfde3 in Perl_ithread_join () from /usr/lib64/
perl5/5.8.8/x86_64-linux-thread-multi/auto/threads/threads.so
#7 0x00002ad648ddff13 in XS_threads_join () from /usr/lib64/
perl5/5.8.8/x86_64-linux-thread-multi/auto/threads/threads.so
#8 0x0000003585690a96 in Perl_pp_entersub () from /usr/lib64/
perl5/5.8.8/x86_64-linux-thread-multi/CORE/libperl.so
#9 0x000000358568a33e in Perl_runops_standard () from /usr/lib64/
perl5/5.8.8/x86_64-linux-thread-multi/CORE/libperl.so
#10 0x000000358563808a in perl_run () from /usr/lib64/perl5/5.8.8/
x86_64-linux-thread-multi/CORE/libperl.so
#11 0x00000000004017bc in main ()
[root@www DBI-1.621]# perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.18-128.1.10.el5, archname=x86_64-linux-
thread-multi
uname='linux ls20-bc2-13.build.redhat.com 2.6.18-128.1.10.el5 #1
smp wed apr 29 13:53:08 edt 2009 x86_64 x86_64 x86_64 gnulinux '
config_args='-des -Doptimize=-O2 -g -pipe -Wall -Wp,-
D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-
size=4 -m64 -mtune=generic -Dversion=5.8.8 -Dmyhostname=localhost -
Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red Hat, Inc. -
Dinstallprefix=/usr -Dprefix=/usr -Dlibpth=/usr/local/lib64 /lib64 /usr/
lib64 -Dprivlib=/usr/lib/perl5/5.8.8 -Dsitelib=/usr/lib/perl5/
site_perl/5.8.8 -Dvendorlib=/usr/lib/perl5/vendor_perl/5.8.8 -Darchlib=/
usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi -Dsitearch=/usr/lib64/
perl5/site_perl/5.8.8/x86_64-linux-thread-multi -Dvendorarch=/usr/lib64/
perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi -Darchname=x86_64-
linux-thread-multi -Dvendorprefix=/usr -Dsiteprefix=/usr -Duseshrplib -
Dusethreads -Duseithreads -Duselargefiles -Dd_dosuid -Dd_semctl_semun -
Di_db -Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio
-Dinstallusrbinperl=n -Ubincompat5005 -Uversiononly -Dpager=/usr/bin/
less -isr -Dd_gethostent_r_proto -Ud_endhostent_r_proto -
Ud_sethostent_r_proto -Ud_endprotoent_r_proto -Ud_setprotoent_r_proto -
Ud_endservent_r_proto -Ud_setservent_r_proto -Dinc_version_list=5.8.7
5.8.6 5.8.5 -Dscriptdir=/usr/bin'
hint=recommended, useposix=true, d_sigaction=define
usethreads=define use5005threads=undef useithreads=define
usemultiplicity=define
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=define use64bitall=define uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
-pipe -Wdeclaration-after-statement -I/usr/local/include -
D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
optimize='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -
fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic',
cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -
Wdeclaration-after-statement -I/usr/local/include -I/usr/include/gdbm'
ccversion='', gccversion='4.1.2 20080704 (Red Hat 4.1.2-44)',
gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='gcc', ldflags =''
libpth=/usr/local/lib64 /lib64 /usr/lib64
libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -
lc
perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version='2.5'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -
Wl,-rpath,/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/CORE'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -pipe -Wall -Wp,-
D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-
size=4 -m64 -mtune=generic'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
PERL_MALLOC_WRAP USE_64_BIT_ALL USE_64_BIT_INT
USE_ITHREADS USE_LARGE_FILES USE_PERLIO
USE_REENTRANT_API
Built under linux
Compiled at Jul 2 2009 05:49:38
@INC:
/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.8
/usr/lib/perl5/site_perl
/usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.8
/usr/lib/perl5/vendor_perl
/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi
/usr/lib/perl5/5.8.8
.
Have not tested with different versions of DBI or perl.