https://bz.apache.org/bugzilla/show_bug.cgi?id=61551
--- Comment #16 from Nic Jansma <[email protected]> --- Unfortunately no [errors] in the error_log. Now I do have mod_security2 installed, and the problem is possibly correlated with getting Slow Loris-style attacked. Some of the times that I'm seeing processes stuck happen after an attack such as: [Tue Sep 26 18:25:46.367095 2017] [:warn] [pid 17763:tid 140504981088000] [client 204.12.234.170:63613] ModSecurity: Access denied with code 400. Too many threads [51] of 50 allowed in WRITE state from x.x.x.x - Possible DoS Consumption Attack [Rejected] Here's the latest thread dump of a process (pid 27258) stuck in "yes (old gen)" since yesterday: https://pastebin.com/9Pda9wG9 Scoreboard at the time: Slot PID Stopping Connections Threads Async connections total accepting busy idle writing keep-alive closing 0 27258 yes (old gen) 47 no 0 0 0 0 0 1 25666 yes (old gen) 18 no 0 0 0 0 0 2 2346 yes (old gen) 17 no 0 0 0 0 0 3 28733 no 59 yes 7 57 0 39 12 4 17763 yes (old gen) 4 no 0 0 0 0 0 5 20520 yes (old gen) 6 no 0 0 0 0 0 6 25471 no 3 yes 0 64 0 3 0 Sum 7 5 154 7 121 0 42 12 G.GGG.GGG.GGGGGG.GG.GG.GGGG.GG.GG..GG.GGG.GGGG..G..GG.GGGGGGGGGG GG.G..............G.GGGGG......GG.....GGG.G.............G.G.G... ..........G....G.G......GGGG.GG.......G.......GG...G.GG...G....G _____W_______R_________R_______R______R__R____________R_________ ..............................................G........G.GG..... .....GG..............G.........GG...........................G... ________________________________________________________________ ................................................................ ................................................................ ................................................................ ................................................................ ................................................................ ................................................................ ................................................................ ................................................................ ................................................................ Not sure if ModSecurity could play a role here. I could temporarily disable it if you think that would help debugging things. -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
