Steps to Upgrade Java version in Weblogic 12.2
In this article, we are going to perform a change Java version in Weblogic 12.2. There are 2 methods to change Java versions in Weblogic 12c.
1. Installed JAVA tar file in a new location and changed JAVA version/location in all respected scripts.
2. Best and simple method installed new java location and create a symbolic link.
In today’s post, we are going to change the java version in Weblogic 12.2 using the second method. Below are the steps to follow to update the java version/location in Weblogic.
Step1:- Create JAVA dir into /u02 mount point.
Here we are creating JAVA dir into /u02 mount point you can use any mount point according to your organization’s policy or standard norms.
root@DbsGurus ~]# cd /u02
[root@DbsGurus u02]# mkdir JAVA
root@DbsGurus u02]# ls -lrt
drwxr-xr-x. 2 oracle oracle 6 Nov 18 12:02 JAVA
Step2:- Download JDK tar(archive) file.
We have to download the jdk1.8 version from Oracle support and copy the JDK file into /u02/JAVA.
[oracle@DbsGurus tmp]$ cd /u02/JAVA/
[oracle@DbsGurus JAVA]$ cp /tmp/jdk-8u271-linux-x64.tar.gz .
[oracle@DbsGurus JAVA]$ ls -lrt
total 139788
-rw-rw-r--. 1 oracle oracle 143142634 Nov 18 12:07 jdk-8u271-linux-x64.tar.gz
Step3:- untar/unpack jdk tar file.
Below is the step to untar jdk-8u271-linux-x64.tar.gz.
[oracle@DbsGurus JAVA]$ tar -xvf jdk-8u271-linux-x64.tar.gz
[oracle@DbsGurus JAVA]$ ls -lrt
total 139792
drwxr-xr-x. 8 oracle oracle 4096 Sep 16 13:14 jdk1.8.0_271
-rw-rw-r--. 1 oracle oracle 143142634 Nov 18 12:07 jdk-8u271-linux-x64.tar.gz
Step4:- Create a symbolic link.
[oracle@DbsGurus JAVA]$ ln -s /u02/JAVA/jdk1.8.0_271 latest
[oracle@DbsGurus JAVA]$ ls -lrt
total 139792
drwxr-xr-x. 8 oracle oracle 4096 Sep 16 13:14 jdk1.8.0_271
-rw-rw-r--. 1 oracle oracle 143142634 Nov 18 12:07 jdk-8u271-linux-x64.tar.gz
lrwxrwxrwx. 1 oracle oracle 22 Nov 18 12:09 latest -> /u02/JAVA/jdk1.8.0_271
Step5:- Below are the WebLogic script that we need to update.
5.1:- Edit JAVA_HOME into nodemanager.properties.
[oracle@DbsGurus nodemanager]$ pwd
/u01/app/oracle/Middleware/user_projects/domains/base_domain/nodemanager
[oracle@DbsGurus nodemanager]$ vi nodemanager.properties
1 #Fri Apr 10 00:51:12 EDT 2020
2 #Node manager properties
3 #Thu Apr 09 19:31:55 EDT 2020
4 DomainsFile=/u01/app/oracle/Middleware/user_projects/domains/base_domain/nodemanager/nodemanager.domains
5 LogLimit=0
6 PropertiesVersion=12.2.1.3.0
7 AuthenticationEnabled=true
8 NodeManagerHome=/u01/app/oracle/Middleware/user_projects/domains/base_domain/nodemanager
9 JavaHome=/u02/JAVA/latest
5.2:- Edit JAVA_HOME into setDomainEnv.sh
[oracle@DbsGurus bin]$ cd
$MW_HOME/user_projects/domains/base_domain/bin
[oracle@DbsGurus bin]$ vi setDomainEnv.sh
99 BEA_JAVA_HOME=""
100 export BEA_JAVA_HOME
101
102 DEFAULT_BEA_JAVA_HOME=""
103 export DEFAULT_BEA_JAVA_HOME
104
105 SUN_JAVA_HOME="/u02/JAVA/latest"
106 export SUN_JAVA_HOME
107
108 DEFAULT_SUN_JAVA_HOME="/u02/JAVA/latest"
109 export DEFAULT_SUN_JAVA_HOME
110
111 ACC_HOME="/u01/app/oracle/Middleware/ohs"
112 export ACC_HOME
113
114
115 if [ "${SUN_JAVA_HOME}" = "" ] ; then
116 SUN_JAVA_HOME="@DEFAULT_SUN_JAVA_HOME"
117 export SUN_JAVA_HOME
118 fi
119
120 if [ "${BEA_JAVA_HOME}" = "" ] ; then
121 BEA_JAVA_HOME="@DEFAULT_BEA_JAVA_HOME"
122 export BEA_JAVA_HOME
123 fi
124
125 if [ "${VM_TYPE}" = "JRockit" ] ; then
126 JAVA_HOME="${BEA_JAVA_HOME}"
127 export JAVA_HOME
128 else
129 if [ "${JAVA_VENDOR}" = "Sun" ] ; then
130 JAVA_HOME="${SUN_JAVA_HOME}"
131 export JAVA_HOME
132 else
133 JAVA_VENDOR="Oracle"
134 export JAVA_VENDOR
135 JAVA_HOME="/u02/JAVA/latest"
136 export JAVA_HOME
137 VM_TYPE="HotSpot"
138 export VM_TYPE
139 fi
140 fi
5.3:- Edit JAVA_HOME into setNMJavaHome.sh
[oracle@RDbsGurus bin]$ cd
$MW_HOME/user_projects/domains/base_domain/bin
[oracle@DbsGurus bin]$ vi setNMJavaHome.sh
6 # *************************************************************************
7 # This script is used to JAVA_HOME for NodeManager.
8 # *************************************************************************
9
10 BEA_JAVA_HOME=""
11 export BEA_JAVA_HOME
12
13 DEFAULT_BEA_JAVA_HOME=""
14 export DEFAULT_BEA_JAVA_HOME
15
16 SUN_JAVA_HOME="/u02/JAVA/latest"
17 export SUN_JAVA_HOME
18
19 DEFAULT_SUN_JAVA_HOME="/u02/JAVA/latest"
20 export DEFAULT_SUN_JAVA_HOME
21
22 if [ "${VM_TYPE}" = "JRockit" ] ; then
23 JAVA_HOME="${BEA_JAVA_HOME}"
24 else
25 if [ "${JAVA_VENDOR}" = "Sun" ] ; then
26 JAVA_HOME="${SUN_JAVA_HOME}"
27 else
28 JAVA_VENDOR="Oracle"
29 export JAVA_VENDOR
30 JAVA_HOME="/u02/JAVA/latest"
31 VM_TYPE="HotSpot"
32 fi
33 fi
34
35 JAVA_HOME="${JAVA_HOME}"
36 export JAVA_HOME
Step6:- Restart WebLogic Services.
we need to bounce WebLogic services so that the above JAVA version changes applied successfully.
6.1:- Stopped node manager and Weblogic process
[oracle@DBGURU bin]$cd /u01/app/oracle/Middleware/user_projects/domains/base_domain/bin
[oracle@DBGURU bin]$ pwd
/u01/app/oracle/Middleware/user_projects/domains/base_domain/bin
[oracle@DBGURU bin]$ ./stopNodeManager.sh
<2020-07-15 EDT 13:22:17>
<2020-07-15 EDT 13:22:17>
<2020-07-15 EDT 13:22:17>
<2020-07-15 EDT 13:22:17>
<2020-07-15 EDT 13:22:17>
<2020-07-15 EDT 13:22:17>
<2020-07-15 EDT 13:22:18>
/u01/app/oracle/Middleware/user_projects/domains/base_domain/nodemanager/stopnodemanager.log was copied to /u01/app/oracle/Middleware/user_projects/domains/base_domain/nodemanager/nodemanager.log
[oracle@DBGURU bin]$ ./stopWebLogic.sh
Stopping Weblogic Server…
Initializing WebLogic Scripting Tool (WLST) …
Jython scans all the jar files it can find at first startup. Depending on the system, this process may take a few minutes to complete, and WLST may not return a prompt right away.
Exiting WebLogic Scripting Tool.
WLST lost connection to the WebLogic Server that you were connected to.
This may happen if the server was shut down or partitioned.
You will have to re-connect to the server once the server is available.
Disconnected from weblogic server:
Done
Stopping Derby Server…
Derby server stopped.
6.2:- Start Weblogic services
[oracle@DBGURU 30965714]$ cd /u01/app/oracle/Middleware/user_projects/domains/base_domain/bin
[oracle@DBGURU bin]$ nohup sh startWebLogic.sh>startWebLogic.log 2>&1&
[1] 72617
[oracle@DBGURU bin]$ nohup sh startNodeManager.sh > startNodeManager.log 2>&1&
Step7:- Validate Java version
[Oracle@DBsGURU ~]$ which java
/u02/java/latest/bin/java
[Oracle@DBsGURU ~]$ java -version
java version "1.8.0_271"
Java(TM) SE Runtime Environment (build 1.8.0_271-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.271-b09, mixed mode)
This document is only for learning purpose and always validate in the LAB environment first before applying in the LIVE environment.
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