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From mar...@apache.org
Subject Re: mod_proxy/3859: cache problems
Date Wed, 28 Apr 1999 13:25:02 GMT
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Synopsis: cache problems

State-Changed-From-To: open-feedback
State-Changed-By: martin
State-Changed-When: Wed Apr 28 06:25:00 PDT 1999
It seems that two different errors are mixed in this PR.
a) [error] (17)File exists: proxy: error linking cache file
This error can occur under normal situations when two
requests to the same URL happen in parallel (two proxy
children). A better concept of "shared memory interprocess
request table" between proxy children might resolve
this (not anytime soon...).

b) [error] (16)Device busy:
Hmmm. What can apache do about that? It seems to be an
error in your OS. All the proxy does is call unlink(name).
If Solaris can't handle that, then.... :-(
Also, I don't see how apache can be involved in
the inability to handle large disks, other than the fact
that one GC must have terminated before the next one starts.
Did you observe any core dumps? Beware, there might be no
log message about it (GC is detached!). Try to trigger a 
GC by touching 0101010170 cache/.time and watch the
background process. Recently in 1.3.7-dev, we had a
core dump candidate.
Try to report any findings. Thank you.

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