[Spce-user] Load balancer crashes on 6.4.1

[qabane me]

Hi all

I have a 6.4.1 installation. Recently the lb has started crashing seemingly
randomly but of course it is never random. Today alone this has happened 11
times.

 CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 22

Followed by a whole lot or other info:
 CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 22
Aug 15 13:18:39 spce lb[1813]: ALERT: <core> [main.c:745]: handle_sigs():
child process 1830 exited by a signal 6
Aug 15 13:18:39 spce lb[1813]: ALERT: <core> [main.c:748]: handle_sigs():
core was generated
Aug 15 13:18:39 spce lb[1820]: NOTICE: <core> [main.c:842]: sig_usr():
Memory still-in-use summary (pkg):
Aug 15 13:18:39 spce lb[1820]: NOTICE: qm_sums: summarizing all alloc'ed.
fragments:
Aug 15 13:18:39 spce lb[1822]: NOTICE: <core> [main.c:842]: sig_usr():
Memory still-in-use summary (pkg):
Aug 15 13:18:39 spce lb[1822]: NOTICE: qm_sums: summarizing all alloc'ed.
fragments:
Aug 15 13:18:39 spce lb[1831]: NOTICE: <core> [main.c:842]: sig_usr():
Memory still-in-use summary (pkg):
Aug 15 13:18:39 spce lb[1836]: NOTICE: <core> [main.c:842]: sig_usr():
Memory still-in-use summary (pkg):
Aug 15 13:18:39 spce lb[1831]: NOTICE: qm_sums: summarizing all alloc'ed.
fragments:
Aug 15 13:18:39 spce lb[1836]: NOTICE: qm_sums: summarizing all alloc'ed.
fragments:
Aug 15 13:18:39 spce lb[1824]: NOTICE: <core> [main.c:842]: sig_usr():
Memory still-in-use summary (pkg):
Aug 15 13:18:39 spce lb[1824]: NOTICE: qm_sums: summarizing all alloc'ed.
fragments:
Aug 15 13:18:39 spce lb[1821]: NOTICE: <core> [main.c:842]: sig_usr():
Memory still-in-use summary (pkg):
Aug 15 13:18:39 spce lb[1821]: NOTICE: qm_sums: summarizing all alloc'ed.
fragments:
Aug 15 13:18:39 spce lb[1839]: NOTICE: <core> [main.c:842]: sig_usr():
Memory still-in-use summary (pkg):
Aug 15 13:18:39 spce lb[1839]: NOTICE: qm_sums: summarizing all alloc'ed.
fragments:
Aug 15 13:18:39 spce lb[1820]: NOTICE: qm_sums:  count=     1 size=
 40 bytes from core: core/timer_proc.c: sr_wtimer_add(330)
Aug 15 13:18:39 spce lb[1820]: NOTICE: qm_sums:  count=     1 size=
232 bytes from core: core/parser/msg_parser.c: get_hdr_field(116)

Any ideas where to start looking?
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