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We are running Apache 2.4.10 with mod_disk_cache on Win 64 with
binaries from ApacheLounge. Users are printing report data and
getting what we assume is a cached copy of an older version of the
PDF report. The incorrect PDF output does not reflect changes made
by the client and reflected in the browser window. This started with
implementation of 2.4.10 yesterday morning. We failed back to Apache
2.2.25 and the problem was resolved. We can reproduce and test this
problem in our UAT environment. Apache 2.4.10 works as front end for TomCat 7.0.55 using mod_jk. TomCat is our middleware server for SAP Business Objects R4 SP9. Reports are generated from BO Web Intelligence and printed to PDF. Same caching problem for output to Excel. We have experimented with varying mod_cache directives. We have not adjusted the CacheIgnoreURLSessionIdentifiers jsessionid bttoken as this was the recommended setting from SAP Business Objects. We would appreciate any help you might provide. The mod_cache parameters are: # # # #====================Configure mod_cache============== <IfModule mod_cache.c> #Address the Thundering Herd identified in Apache’s Caching Guide CacheLock on CacheLockPath D:/apache_mod_cache/lock CacheLockMaxAge 5 #This parameter tells Apache to ignore unique session identifiers #when caching static content. #SAP BI Platform 4.0 uses the strings jsessionid and bttoken to identify user sessions. CacheIgnoreURLSessionIdentifiers jsessionid bttoken #Don’t cache cookies as they are unique per user CacheIgnoreHeaders Set-Cookie #Enable mod_disk_cache instead of mod_mem_cache # 2.4 version is <IfModule mod_cache_disk.c> <IfModule mod_cache_disk.c> CacheRoot D:/apache_mod_cache/cacheroot CacheEnable disk / CacheDirLevels 2 CacheDirLength 1 CacheMaxFileSize 1000000 CacheMinFileSize 64 CacheDefaultExpire 3600 CacheMaxExpire 86400 </IfModule> </IfModule> --
_________________________________ Walt Scheper
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