It seems that the grsecurity version in Mandrake 9.2 with the kernel source distribution 2.4.22-21mdk is different than the one previously discussed in this thread. I found that the compile options in the .config file were named differently, which I did not notice earlier because I use xconfig to disable/enable them, and here they have other but similar display names.
However, I found out that I had to disable the compile option CONFIG_GRKERNSEC_PROC_MEMMAP to get rid of my Java problem, but I now discovered other grsec errors on kdeinit, cleanup and procmail. In these cases it is hard to tell whether it has some visible effect on my system workings. It seems to me that the grsecurity patch in Mandrake 9.2 with the kernel source distribution 2.4.22-21mdk is not working very well with many standard system parts. Maybe I should try another kernel source distribution or maybe just I need to add some extra acl definitions? I am still new to this stuff, so I would apreciate if someone could give me some feedback on this.