[ic] Using external database causing intermittent errors
DB at M-and-D.com
Sat Feb 2 13:51:54 EST 2008
Hi - I've completed my test cluster configuration of two identical 5.4.2
standard demo stores on two separate machines. For both stores I used
'test.domain.com' as the server name when I ran makecat, and for both I
used the same user and database names.
The catalog is accessed from http://test.domain.com
Machine 1 hosts test1.domain.com
Machine 2 hosts test2.domain.com
Both domains include test.domain.com as a ServerAlias in their
httpd.conf files. Both machines have mysql sessions enabled. The
machines are connected to each other via gigabit.
Everything seems to run just fine until I tell the test2 store to use
the identically-named database located on test1's server (instead of
test2's own local version of the database). Once I do that, I get
intermittent "premature end of script header" errors. If I hit reload on
the browser when I get such an error, most often the page will load
The clustering server is running HAproxy (http://haproxy.1wt.eu/) and
while simple to configure, this software causes the cluster members to
see all requests as originating from the IP of the HAproxy server. But
since the setup works ok with each machine using a local database, I'm
not sure I can say this is really the problem.
Can anyone suggest why having one member use the other's databse would
cause such errors? Obviously both members must share a common database
for a real-world IC cluster to be workable. Any thoughts are welcome.
Typical error from test2's /usr/local/interchange/error.log:
184.108.40.206 EokMAfzY:220.127.116.11 - [02/February/2008:13:38:12 -0500]
Died in server spawn: Storable binary image v2.7 more recent than I am
(v2.6) at blib/lib/Storable.pm (autosplit into
blib/lib/auto/Storable/thaw.al) line 358, at
/usr/local/interchange/lib/Vend/Session.pm line 420
This error seems fairly descriptive, but sadly I don't understand it.
Typical error from test2's httpd error log:
[Sat Feb 02 13:38:12 2008] [error] [client 18.104.22.168] Premature end
of script headers: test_store, referer:
Any thoughts or suggestions are welcome.
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