https://bz.apache.org/bugzilla/show_bug.cgi?id=66005
--- Comment #27 from Michael Osipov <micha...@apache.org> --- (In reply to Josef Čejka from comment #21) > Created attachment 38538 [details] > Limit mod_jk.so exported symbols to "jk_module" only. > > I found the real culprit. Please ignore my previous patch. > > ATM mod_jk.so library exports all internal symbols so any other library > loaded after it can bind it's unresolved symbols on mod_jk.so. Glibc is > checking dependencies and dlclose() does not unload library on which depends > other library. This breaks Apache module reloading mechanism because > following dlopen() will return already existing handler to mod_jk.so without > re-initialization of global static variables so they contain still already > invalid memory pointers instead of NULL values. > > In my case symbol "context_free@@LIBSELINUX_1.0" required by > libkrb5support.so was bound to context_free from mod_jk.so instead of > function with the same name provided by libselinux.so.1 because mod_jk.so > was loaded first. It occurred only if nscd daemon was disabled and nsswitch > had to load krb5 libraries. I can easily reproduce the issue on SLES15-SP4 > by disabling nscd service. IMO this can also explain why Lothar reported > that his issue disappeared after modifying nsswitch.conf. Josef, kudos to your investigation skills! -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org
