Re: Cannot open SSLSessionCache DBM file

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Dietmar.Mueller@xxxxxxxxxxxx wrote:
Hi,

after some years serving files with ssl and not ssl during the last week we get 2 times a big showstopper because httpd accept only some ssl requests. Some connects works well but some one cannt connect. The client say that he can't reach the server and nothing in error or access.log.

But at the start from the problem where are some lines in error.log

[Thu Jul 02 23:18:38 2009] [error] (OS 32)Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird. : Cannot open SSLSessionCache DBM file `D:/Apache2/ssl/ssl_scache' for reading (fetch) [Thu Jul 02 23:18:38 2009] [error] (OS 32)Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird. : Cannot open SSLSessionCache DBM file `D:/Apache2/ssl/ssl_scache' for writing (store) [Thu Jul 02 23:18:38 2009] [error] (OS 32)Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird. : Cannot open SSLSessionCache DBM file `D:/Apache2/ssl/ssl_scache' for writing (store) [Thu Jul 02 23:18:39 2009] [error] (OS 32)Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird. : Cannot open SSLSessionCache DBM file `D:/Apache2/ssl/ssl_scache' for writing (store) [Thu Jul 02 23:18:39 2009] [error] (OS 32)Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird. : Cannot open SSLSessionCache DBM file `D:/Apache2/ssl/ssl_scache' for reading (fetch) [Thu Jul 02 23:18:39 2009] [error] (OS 32)Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird. : Cannot open SSLSessionCache DBM file `D:/Apache2/ssl/ssl_scache' for writing (store)

In english: the process can't acces a file because it is used by an other process

This errors are repeated about 20 times and then nothing else.

My System:

Win2000 SP4
Apache/2.0.55 (Win32) DAV/2 mod_ssl/2.0.55 OpenSSL/0.9.8a mod_jk/1.2.28

Any idea or hint is wellcome


Search Google for "ssl session cache apache".
There are quite a few items there, many in German.

I have personally no idea, but from the errors above and the on-line Apache mod_ssl documentation, it seems to have something to do with mutexes etc.. Since your host is Windows, there are probably some special settings. Note that under Windows, the Apache core MPM is a specific one (e.g. /not/ "prefork" for instance). As far as I know, there are only 2 Apache processes : the "main" process, and one "child", but this child has many threads.


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