A library used in JVM Oracle for random number generation applies /dev/random for UNIX platforms by default. This can lead to slow download speed of the WebLogic Server process.
It is recommended to use /dev/urandom, if the default JVM configuration starts the WebLogic server too slowly. To determine if any problems occur when starting the server, enter the following command to the CLI:
head -n 1 /dev/random
If a response is returned quickly, /dev/random can be used as a default random number generator for JVM. If a response is returned over time, perform the following actions to configure JVM to use /dev /urandom:
- Open the file $JAVA_HOME/jre/lib/security/java.security in a text editor.
Replace the following line:
securerandom.source=file:/dev/random
With this:
securerandom.source=file:/dev/./urandom
- Save the changes and exit the editor.
Solving problems after installation
"eth0" network interface not found"
Enter the menu Administration/EMS server configuration/Scheduled tasks (Monitors), select the EMS server self diagnostics monitor (ID=8) and click "Edit".
Edit window of the monitor's parameters will be opened. Replace "net_name" parameter with the name of your interface.
The interface's name can be viewed by running the following command on the server.
tester@swlc:~$ ifconfig
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.50.1 netmask 255.255.255.0 broadcast 192.168.50.255
inet6 fe80::523e:aaff:fe05:306f prefixlen 64 scopeid 0x20<link>
ether 50:3e:aa:05:30:6f txqueuelen 1000 (Ethernet)
RX packets 4711682 bytes 3737032747 (3.7 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2843658 bytes 1607515235 (1.6 GB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
"DB pool size error: Max DB connections = 151. EMS DB pools max conn info: ont=40; tree=20; wireless=30; syslog=4; event=32; radius=40; Total = 166"The number of connections
Depending on the estimated number of access points, the maximum number of AP connections should be specified via max_connections parameter. It is specified in /etc/mysql/mysql.conf.d/mysql.cnf by default, but commented out. Uncomment it and enter the required number, for example, like this:
max_connections = 500
Read more in v1.14_MySQL.