Re: System hangs by initializing JRE

From: Vimal Rai <vimal.rai_at_india.birlasoft.com>
Date: 5 Sep 2002 18:47:27 -0700
Message-ID: <d80ec6b7.0209051747.6c3751f7@posting.google.com>

Installing Oracle 8.1.7 on Redhat Linux 7.1

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After several attempts I have successfully managed to get Oracle 8.1.7 running on Redhat 7.1 – thanks to various articles on the web. However none of these articles appeared to cover everything, so I have consolidated my knowledge for other people to work from. As everyone who has tried so far knows the problems is Redhat 7.x uses a newer version of the glibc libraries and all you need to do is use the compatibility libraries or something to solve this problem. Now if you're like me I can use Linux a bit but don't have much experience in this type of thing.

So for people like me this is what you do.

Getting The Compat Libraries.

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If you are installing Linux 7.1 from scratch, make sure you select the following compat-egcs, compat-glibc and compat-libs packages during install – as these will install some libraries you will need to link to when installing oracle.

If you are installing on a pre-configured Linux 7.1 box then check to see if you have a /usr/i386-glibc21-linux/lib directory. If you do then you should have the libraries listed later on in there.

If not then install the compat-glibc RPM for 2.1.3.x, just get your local Linux expert to do this or login as root and either download the rpm or install it from a cd.

Setting Up The Oracle Account

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To do this either use the oracle manual or go to http://jordan.fortwayne.com/oracle/817.html Tom Bissett has done an excellent job here of simplifying what you need to get oracle up and running on Redhat 6.x

You should now have an oracle user with some .bash_profile settings and some groups setup, also you may have tried to install oracle without any success, if you jumped straight to the install

Now if you try and run oracle installer now, it may just hog all your cpu's and do nothing. If it does that, then add the following lines to you .bash_profile.
LD_ASSUME_KERNEL=2.2.5; export LD_ASSUME_KERNEL

Now login and out again and run the installer, all should be happy now.

Installing The Oracle Software

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Now that the installer is running, install all the components you need, soon as you get a relinking error message, open another terminal and copy the following libraries, according to this technet article http://technet.oracle.com:89/ubb/Forum7/HTML/200166.html

cp ld-2.1.3.so $ORACLE_HOME/lib/ld-linux.so.2
cp libc-2.1.3.so $ORACLE_HOME/lib
cp libdl.so.2 $ORACLE_HOME/lib/libdl.so

cp libpthread.so.0 $ORACLE_HOME/lib/libpthread.so

and create a file in $ORACLE_HOME/lib called libc.so with the following contents (as a single line):
GROUP ( /lib/libc-2.1.3.so /lib/ld-linux.so.2 /libc_nonshared.a ) Substitute the value of $ORACLE_HOME for and the location of the compat-glibc directory for . For example: My $ORACLE_HOME is:
/u01/app/oracle/product/8.1.7

and my compat-glibc directory is:
/usr/i386-glibc21-linux/lib

so the GROUP line looks like this:
GROUP (/u01/app/oracle/product/8.1.7/lib/libc-2.1.3.so
/u01/app/oracle/product/8.1.7/lib/ld-linux.so.2
/usr/i386-glibc21-linux/lib/libc_nonshared.a)
Now press retry and the file should link happily, if not, no worries, we can sort this in a minute, just press ignore so you get all the components installed.

Once the install has finished

Go to the oracle bin directory and type in relink all – make sure you have plenty of terminal buffer setup so you can go back and look at the error messages.

After a while the relinking will have finished and you will need to track down which libraries are incompatible. Look for error messages about invalid call references; these lines will have a library name associated with them e.g. Libcrypt.so, if you see this copy the library from /i386-glibc21-linux/lib, it will most likely be named lib(XXX)-2.1.3.so, therefore when copying it you will be renaming it to lib(XXX).so

Try the relinking again and everything should link, if it doesn't track down the library and try again!

For me I needed
libpthread.so
libm.so
libcrypt.so
libdl.so
libc-2.1.3.so – you leave this called libc-2.1.3.so ld-linux.so.2
Once you have linked everything you can use dbassist to create a nice clean database.

You also may want to

1. Increase the value of shmmax (maximum shared memory), you can do this by echoing a value normally half your physical memory, in bytes, to the /proc/sys/kernel/shmmax file, or you could recompile your kernel, not my thing.
2. Tweak your virtual memory settings for database activity.
3. Tune you parameter file to suit your needs – you should definitely do this.

Hope this helps and if there are simpler easier ways to do this, then add it to the message thread.

I would also like to thank all the people out there who had placed answers to other people's installation attempts and indirectly helped me get oracle up and running.

Also I hold no responsibility for mistakes or pointless steps in this message, I was just trying to help. Received on Thu Sep 05 2002 - 20:47:27 CDT