From: Stoiko Ivanov <s.ivanov@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH http-server v2 0/5] improve error handling in accept_connections
Date: Fri, 4 Dec 2020 18:56:24 +0100 [thread overview]
Message-ID: <20201204175629.30116-1-s.ivanov@proxmox.com> (raw)
v1->v2:
* increment of connection count now happens right before the AnyEvent::Handle
is created
* the handle-creation is guarded by an error-flag, and if it fails the
connection count is decremented (bounded to 0) again
* as suggested by Thomas - added a debug print sub which includes the
package name, linenumber and function name where the printing happens
* refactored all active debug-prints to use it.
original cover-letter for v1:
This patchset is the result of investigating a report in our community forum:
https://forum.proxmox.com/threads/pveproxy-eats-available-ram.79617/
The first patch fixes an issue where pveproxy worker processes would never
exit (and eat quite a bit of ram+cpu) when 'getpeername' returned an error.
The second seemed to me like a sensible further cleanup, and the third patch
will hopefully provide the needed information when debugging such things in
the future.
Huge thanks to Dominik, who analyzed this issue with me!
Stoiko Ivanov (5):
add debug print helper
accept-phase: fix conn_count "leak"
accept-phase: shutdown socket on early error
add debug log for problems during accept
debug: uniformly use dprint
PVE/APIServer/AnyEvent.pm | 74 +++++++++++++++++++++++++++++++--------
1 file changed, 59 insertions(+), 15 deletions(-)
--
2.20.1
next reply other threads:[~2020-12-04 17:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 17:56 Stoiko Ivanov [this message]
2020-12-04 17:56 ` [pve-devel] [PATCH http-server v2 1/5] add debug print helper Stoiko Ivanov
2020-12-07 10:11 ` Thomas Lamprecht
2020-12-04 17:56 ` [pve-devel] [PATCH http-server v2 2/5] accept-phase: fix conn_count "leak" Stoiko Ivanov
2020-12-07 10:28 ` Thomas Lamprecht
2020-12-04 17:56 ` [pve-devel] [PATCH http-server v2 3/5] accept-phase: shutdown socket on early error Stoiko Ivanov
2020-12-07 10:39 ` Thomas Lamprecht
2020-12-04 17:56 ` [pve-devel] [PATCH http-server v2 4/5] add debug log for problems during accept Stoiko Ivanov
2020-12-07 10:50 ` Thomas Lamprecht
2020-12-04 17:56 ` [pve-devel] [PATCH http-server v2 5/5] debug: uniformly use dprint Stoiko Ivanov
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