Package: apache2 Version: 2.4.25-3+deb9u9 After the latest upgrade, from time to time apache2 freeze (not accepting connections, not responding at all). It comes back alone after the timeout expires or if is restarted manual. I activated even trace level but I cannot find any errors to point me to a solution. It happens spontaneously , no increase or decrease in traffic, no errors in error log, kernel or syslog. After timeout expires, I see lots of these:
Fri Mar 13 05:49:58.656140 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(588): [client :48338] AH00840: inside shmcb_status [Fri Mar 13 05:49:58.656157 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656170 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656182 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656190 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656202 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656210 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656222 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656230 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656242 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656275 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656284 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656293 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656302 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656309 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656322 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656329 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656340 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656347 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656358 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656365 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656377 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 68 and reclaiming 1 removed socache entries [Fri Mar 13 05:49:58.656384 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656392 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656399 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656408 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656418 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656429 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656436 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656451 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656461 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656469 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656479 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656487 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656496 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656518 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656528 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656540 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656549 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656557 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656567 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656575 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656582 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656590 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656599 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656608 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656617 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656626 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656636 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656647 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656656 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656666 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656707 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656719 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656726 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656735 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656742 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656754 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries [Fri Mar 13 05:49:58.656761 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(751): AH00843: we now have 0 socache entries [Fri Mar 13 05:49:58.656773 2020] [socache_shmcb:debug] [pid 18926:tid 140163388741376] mod_socache_shmcb.c(732): AH00842: expiring 69 and reclaiming 0 removed socache entries I don't know what it happens and how to solve this problem.
