Description of problem:
[PgPool]Can't create bug when the jobs number got to 52474

Version-Release number of selected component (if applicable):
4.4.9038-3

How reproducible:
Always

Steps to Reproduce:
1.Stop all bugzilla-queue services
2.Then do a very long test against rdu pgpool environment, it will generate 52474 bugzilla jobs
3.Then try to create a new bug.

Actual results:
Page show error when create bug:

Inserting a TheSchwartz::Job=HASH(0x7f0e47eab978) job into the Job Queue failed with the following error: Failed to execute INSERT INTO ts_job (funcid, arg, uniqkey, insert_time, run_after, grabbed_until, priority, coalesce) VALUES (?, ?, ?, ?, ?, ?, ?, ?) with funcid, arg, uniqkey, insert_time, run_after, grabbed_until, priority, coalesce: DBD::Pg::st execute failed: ERROR: right sibling's left-link doesn't match: block 550 links to 1 instead of expected 555 in index "ts_job_funcid_idx" at /usr/share/perl5/vendor_perl/Data/ObjectDriver/Driver/DBI.pm line 396. 


Traceback:
 at /var/www/html/bugzilla/Bugzilla/JobQueue.pm line 98
	Bugzilla::JobQueue::insert(...) called at /var/www/html/bugzilla/Bugzilla/Mailer.pm line 49
	Bugzilla::Mailer::MessageToMTA(...) called at /var/www/html/bugzilla/Bugzilla/BugMail.pm line 461
	Bugzilla::BugMail::sendMail(...) called at /var/www/html/bugzilla/Bugzilla/BugMail.pm line 288
	Bugzilla::BugMail::Send(...) called at /var/www/html/bugzilla/post_bug.cgi line 259
	ModPerl::ROOT::Bugzilla::ModPerl::ResponseHandler::var_www_html_bugzilla_post_bug_2ecgi::handler(...) called at /usr/lib64/perl5/vendor_perl/ModPerl/RegistryCooker.pm line 204
	eval {...} called at /usr/lib64/perl5/vendor_perl/ModPerl/RegistryCooker.pm line 204
	ModPerl::RegistryCooker::run(...) called at /usr/lib64/perl5/vendor_perl/ModPerl/RegistryCooker.pm line 170
	ModPerl::RegistryCooker::default_handler(...) called at /usr/lib64/perl5/vendor_perl/ModPerl/Registry.pm line 31
	ModPerl::Registry::handler(...) called at /var/www/html/bugzilla/mod_perl.pl line 134
	Bugzilla::ModPerl::ResponseHandler::handler(...) called at -e line 0
	eval {...} called at -e line 0


Expected results:
52474 jobs in the queue

Additional info: