Fix: Unable to start WebLogic Admin Server

Issue : Weblogic doesn't start and you will start getting below error message:

<Jul 3, 2014 10:57:38 PM EDT> <Info> <Management> <BEA-141281> <unable to get file lock, will retry ...>

Resolution: 

When a server is starting, a .lok file is created. This is found under $FMW_HOME/servers/SERVERNAME/tmp/SERVERNAME.lok. If the file exists , then it cannot be created and the server cannot start. To correct this delete the existing file or kill the running process that is holding such file.

Sample Screen:

-- Siva Pokuri

Info: Required Linux RPM Packages for Oracle 11g Database Installation

Download Location: http://www.4shared.com/folder/emd2Iwqs/LinuxPackages.html

elfutils-libelf-devel-0.125-3.SEL5.x86_64.rpm

gcc-c++-4.1.2-54.el5.x86_64.rpm

glibc-devel-2.3.4-2.19.i386.rpm

glibc-devel-2.5-24.i386.rpm

glibc-devel-2.5-49.x86_64.rpm

glibc-headers-2.5-24.i386.rpm

libaio-devel-0.3.106-5.i386.rpm

libaio-devel-0.3.106-5.x86_64.rpm

libstdc++-devel-4.1.2-14.el5.i386.rpm

libstdc++-devel-4.1.2-14.el5.x86_64.rpm

sysstat-7.0.2-3.el5_5.1.i386.rpm

unixODBC-2.2.11-1.i386.rpm

unixODBC-2.2.11-7.1.x86_64.rpm

unixODBC-devel-2.2.11-7.1.i386.rpm

-- Siva Pokuri.

TIPS: Linux Kernel prerequisites for Oracle Database 11g Installation

1) Login as "root" user

2) Edit sysctl.conf file

         vi /etc/sysctl.conf

3) Append a config directive as follows:
      

         kernel.sem = 250 32000 100 128
         fs.file-max = 8000000
         net.ipv4.ip_local_port_range = 9000 65500
         net.core.rmem_default = 4194304
         net.core.rmem_max = 4194304
         net.core.wmem_default = 262144
         net.core.wmem_max = 1048576
         fs.aio-max-nr = 1048576

4) Save and close the file. Users need to log out and log back 

   in again to changes take effect or just type the following command:

         sysctl -p

-- Siva Pokuri.