(ITS#6310) Slapd with pcache crashes under load

[karavelov@spnet.net]

Full_Name: luben karavelov
Version: 2.4.18 - HEAD
OS: Debian Linux
URL: 
Submission from: (NULL) (212.50.0.80)


Hello,
I have 2 running slapd servers for load balancing. The 2 instances are
configured with back-sql and pcache overlay. Every 5-15 minutes one of the
servers crashes.

The config could be found here:
http://purgatory.spnet.net/~karavelov/slapd.conf.h2

A gdb session with the resulting core dump could be found here:
http://purgatory.spnet.net/~karavelov/gdb1

Without proxycache overlay the servers does not crash in this manner.

The software tested is 
1. slapd 2.4.18 with backported pcache.c from HEAD
2. slapd HEAD


I could provide more info, just ask.

Thanks in advance for help
Luben