Zope 2.6.2 not responding
Anybody had problems with zope 2.6.2 not responding for a while? Also running ZEO from ZODB 3.1.2. it happened this morning for 20 minutes, then spontaneously resolved itself; same thing appears to be happening now. I've got bigM logging enabled, and I can clearly see that requests are arriving but not being returned. Here's an excerpt: B 435806428 2003-10-01T13:16:38 GET /VirtualHostBase/http/www.ctimi.com:80/VHOST S/ctimi/VirtualHostRoot/ I 435806428 2003-10-01T13:16:38 0 B 319549172 2003-10-01T13:16:45 GET / I 319549172 2003-10-01T13:16:45 0 B 272696500 2003-10-01T13:16:57 GET /VirtualHostBase/http/www.ctimi.com:80/VHOST S/ctimi/VirtualHostRoot/ I 272696500 2003-10-01T13:16:57 0 B 306281756 2003-10-01T13:17:04 GET / I 306281756 2003-10-01T13:17:04 0 B 181909652 2003-10-01T13:17:16 GET /VirtualHostBase/http/www.ctimi.com:80/VHOST S/ctimi/VirtualHostRoot/ I 181909652 2003-10-01T13:17:16 0 B 351241164 2003-10-01T13:17:23 GET / I 351241164 2003-10-01T13:17:23 0 B 353015292 2003-10-01T13:17:35 GET /VirtualHostBase/http/www.ctimi.com:80/VHOST S/ctimi/VirtualHostRoot/ I 353015292 2003-10-01T13:17:35 0 B 221029148 2003-10-01T13:17:51 GET / I 221029148 2003-10-01T13:17:51 0 B 351466500 2003-10-01T13:18:03 GET /VirtualHostBase/http/www.ctimi.com:80/VHOST S/ctimi/VirtualHostRoot/ I 351466500 2003-10-01T13:18:03 0 B 445536796 2003-10-01T13:18:09 GET / I 445536796 2003-10-01T13:18:09 0 B 220025756 2003-10-01T13:18:15 GET / I 220025756 2003-10-01T13:18:15 0 B 249289292 2003-10-01T13:18:21 GET /VirtualHostBase/http/www.ctimi.com:80/VHOST S/ctimi/VirtualHostRoot/ I 249289292 2003-10-01T13:18:21 0 Examining the log during the outage this morning, I see that they all of a sudden started returning responses (an "A" line in bigM log) after about 20 minutes and then everything was OK. -- Paul Winkler http://www.slinkp.com Look! Up in the sky! It's THE CHEESE! (random hero from isometric.spaceninja.com)
Paul Winkler wrote at 2003-10-1 13:28 -0400:
Anybody had problems with zope 2.6.2 not responding for a while? Also running ZEO from ZODB 3.1.2.
it happened this morning for 20 minutes, then spontaneously resolved itself; same thing appears to be happening now.
Do you know what your hanging requests are doing? Sometimes network (or database) problems may delay things considerably. We had an issue with Postgres where suddenly (harmless) queries took up to an hour to complete. Then several dozens of long running queries completed within a few seconds. The problem disappeared after we upgraded the Postgres server. Dieter
On Fri, Oct 03, 2003 at 12:22:54AM +0200, Dieter Maurer wrote:
Paul Winkler wrote at 2003-10-1 13:28 -0400:
Anybody had problems with zope 2.6.2 not responding for a while? Also running ZEO from ZODB 3.1.2.
it happened this morning for 20 minutes, then spontaneously resolved itself; same thing appears to be happening now.
Do you know what your hanging requests are doing?
not yet. I'm currently going through the big-M log trying to see a pattern.
We had an issue with Postgres where suddenly (harmless) queries took up to an hour to complete. Then several dozens of long running queries completed within a few seconds. The problem disappeared after we upgraded the Postgres server.
not an issue here... there's no database involved other than the ZODB. I have wondered if maybe it's a ZEO issue, or a networking issue between zope & the zeo server. Seems unlikely given that they are in the same rack, conneted via a 100baseT ethernet switch, and ping time between them is very fast every time i've tried it. The problem was noticed after upgrading the server to Zope 2.6.2 / ZEO 2 (from ZODB3-3.1.2.) I downgraded back to Zope 2.5.1 / ZEO 1, which seems to have somewhat reduced the severity of the problem, but it's still there. Now the "stuck" periods are 0 - 3 minutes instead of 20 minutes or more. It may be that this was happening all along and I never noticed before due to the short duration of the outages. I have not seen this on any of our other systems. Sigh. -- Paul Winkler http://www.slinkp.com Look! Up in the sky! It's THE AMAZING HEATHEN I LOVE YOU! (random hero from isometric.spaceninja.com)
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Dieter Maurer -
Paul Winkler