yes, one of these dumps was caused by overloaded db server. Pool size 20
should be enough, i just tested Jboss connection pool monitor and max
watermark after about 1 week of use is 19.
but it has also other cause, other then jdbc, because it hanged at
application not doing jdbc at all. After migration to JBoss i found that
jboss returns empty pages on conditions where GF hanged. It was discovered
that after placing timeout on AJP module it goes away.
ProxyPass / ajp://127.0.0.1:8009/ ttl=60
my guess is that jboss closed idle connection from Apache, apache atempted to
send new request there and because connection was closed empty page was
returned.
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