WLST Issues

NoClassDefFoundError: weblogic.WLST issue

While starting WLST Script you might encounter this issue

Exception in thread "main" java.lang.NoClassDefFoundError: weblogic.WLST
   at gnu.java.lang.MainThread.run(libgcj.so.7rh)
Caused by: java.lang .ClassNotFoundException: weblogic.WLST not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:./], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
   at java.net.URLClassLoader.findClass(libgcj.so.7rh)
   at java.lang.ClassLoader.loadClass(libgcj.so.7rh)
   at java.lang.ClassLoader.loadClass(libgcj.so.7rh)
   at gnu.java.lang.MainThread.run(libgcj.so.7rh)

What to do? What is the fix? searched in google but they all said run setWLSEnv.sh or cmd. Here my way is setup two environment variable availble to your shell.

1. WL_HOME your weblogic installation path
2. CLASSPATH with WL_HOME/server/lib/weblogic.jar

You can update these environment variables in your .bash_profile or .bashrc or .profile in the Home directory.

One more alternative method is use the wlst.sh script with absolute path.

alias wlst='${MW_HOME}/oracle_common/common/bin/wlst.sh'

Now you can directly use wlst mypthon.py my.properties

Still have problem in invoking WLST?

$ java weblogic.WLST

Initializing WebLogic Scripting Tool (WLST) ...

Problem invoking WLST - java.lang.NoClassDefFoundError: weblogic.management.scripting.WLScriptContext

Solution for this issue is set the JAVA_HOME properly. that means don't use Linux provided Java instead you have to use Oracle JDK or Jrockit as follows:

export JAVA_HOME=/apps/softwares/weblogic/jdk160_05
or 
export JAVA_HOME=/apps/softwares/weblogic/jrockit_160_05
export PATH=$JAVA_HOME/bin:$PATH

Update these lines in your .bash_profile or .profile check in new Window/Terminal or execute your .bash_profile by placing dot.

$ . .bash_profile

Permission Denied issue

Today when I have tried to workout on WLST it was throwing error.It was shocked me! till yesterday it was working why it is not working now. This is common sentence for every issue :) Need to analyze the problem.

pavanbsd@ubuntu:~$ wlst

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.

*sys-package-mgr*: can't create package cache dir, '/tmpWLSTTemppavanbsd/packages'
java.io.IOException: Permission denied
        at java.io.UnixFileSystem.createFileExclusively(Native Method)
        at java.io.File.createNewFile(File.java:1006)
        at java.io.File.createTempFile(File.java:1989)
        at java.io.File.createTempFile(File.java:2040)
        at com.oracle.cie.domain.script.jython.WLST_offline.getWLSTOfflineInitFilePath(WLST_offline.java:239)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at weblogic.management.scripting.utils.WLSTUtil.getOfflineWLSTScriptPathInternal(WLSTUtil.java:104)
        at weblogic.management.scripting.utils.WLSTUtil.setupOfflineInternal(WLSTUtil.java:300)
        at weblogic.management.scripting.utils.WLSTUtil.setupOffline(WLSTUtil.java:277)
        at weblogic.management.scripting.utils.WLSTUtilWrapper.setupOffline(WLSTUtilWrapper.java:29)
        at weblogic.management.scripting.utils.WLSTInterpreter.(WLSTInterpreter.java:168)
        at weblogic.management.scripting.WLST.main(WLST.java:130)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at weblogic.WLST.main(WLST.java:29)
Problem invoking WLST - java.lang.NullPointerException

Problem here is OS Permission denied to create files in /tmp path. I've remmebered that when I want to try re-install the Weblogic software encountered not enough space in /tmp path. So I had removed all the files forcefully using root user. That makes in accessable to weblogic user to write into the /tmp path.
Here is the solution

sudo chmod 1777 /tmp

Issues in WLST 2 :

This again While Starting with the WLST Shell, we were facing the below issue, offcourse this is common for the first time WLST users:

bash-3.00$ java weblogic.WLST
Initializing WebLogic Scripting Tool (WLST) ...
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/rt.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/weblogic92/server/lib/weblogic.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/rt.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/jsse.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/jce.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/charsets.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/ext/sunjce_provider.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/ext/sunpkcs11.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/ext/dnsns.jar'
*sys-package-mgr*: can't write cache file for '/HomeServerInstancepath/bea/jdk150_10/jre/lib/ext/localedata.jar'
*sys-package-mgr*: can't write index file
Welcome to WebLogic Server Administration Scripting Shell
Type help() for help on available commands
wls:/offline>

-->

To Fix the above issue, we have two options:

1) This problem I had encountered in Solaris machine, We need to change the permissions of /var/tmp/wlstTemp directory content must be accessed by all users means to use "chmod 777"
or
2) we need to define the cache directory path using open for every user path as /tmp/wlstTemp

bash-3.00$ java -Dpython.cachedir=/tmp/wlstTemp weblogic.WLST
Initializing WebLogic Scripting Tool (WLST) ...

Welcome to WebLogic Server Administration Scripting Shell
Type help() for help on available commands

wls:/offline>

I found very good referrence blog who always talks technically :) that 'Techtalks'
http://www.prasannatech.net/2009/02/jython-sys-package-mgr-processing-jar.html

Now your turn to comment on this issue how do you feel when you see this on your Solaris machine or Linux machine :)
Keep posting your suggestions too...

Related Posts

• WLST Errors and Exceptions
• WLST Starting issues
• Best WLST Tricks and tips

WebLogic 12c new features in WLST

WLST Change in 12c domain template path

When you create a new Domain with default domain template wls.jar it is moved from 

$WL_HOME/common/templates/domain/wls.jar 

to

$WL_HOME/common/templates/wls/wls.jar 

Notify this and update your old scripts with this new template path

WLST Security Stronger

WebLogic 11g or previous versions allows password with any number of lines, but now in WebLogic 12c it has changed. You need to change the password to at obey the minimum 8 alphanumerics with atleast a number or any symbol. Example you can have like 'Welcome1'

If you directly executing your WebLogic 10 WLST offline scripts you might encounter following error:

60455: The password must be at least 8 alphanumeric characters with at least one number or special character.
60455: Correct the password.

JLine associated with WLST 12c version

While working on Martin book we have found that Linux/Unix environments don't have feature like in Windows - WLST shell had. To enable that Martin suggested Apache JLine 0.9 need to installed and keep in the path. but now in WebLogic 12c (12.1.3) version it is buit-in.

• You can use up arrow and down arrow for navigating to previous WLST commands
• There would be separate history hidden file created .jline-WLST.history in the home directory, it is similar to .bash_history 

[wladmin@srv2 ~]$ cat .jline-WLST.history
exit
execfile('createDomain.py')
exit
exit()
print os.pathsep
help('nmConnect')
nmConnect('weblogic','welcome1','183.82.51.72','5556','sivaDomain','/home/wladmin/wldomain/sivaDomain','plain')
nmConnect('weblogic','welcome1','183.82.51.72','5556','sivaDomain','/home/wladmin/wldomains/sivaDomain','plain')
nm()
nmKill('managed3')
help(nmKill)
help('nmKill')
nmKill('managed3')
nmStart('managed3')
nmDisconnect()

This has been tested and executed on RHEL environment.

What if we don't have 12c latest version?

You can download jLine from sorceforge.net site and include the library path into your CLASSPATH then run your WLST. RefLink: JLine sourceforge.net

Related Posts

• WLST Errors and Exceptions
• WLST Starting issues
• Best WLST Tricks and tips

Create Managed Server using WLST Automation

This post is intended for those who just started working on WLST for configuration of WebLogic domain. Here I have a sample WLST script that creates a Managed server. You have two choices to configure managed server: offline and online mode. Here we have online configuration script. Here the first trail with the direct connection parameter passing. I have tried it on my Oracle VirtualBox running WebLogic 12.1.2. I know this is bad coding style that is using hardcoding the values in the script.

Better you might try with properties file that can be updated frequently for your domains.

def createMS(name, listenadr, port):
        connect('weblogic', 'welcome1', 't3://192.168.1.106:9100')
        edit()
        startEdit()
        cd('/')
        cmo.createServer(name)
        cd('/Servers/' + name)
        cmo.setListenAddress(listenadr)
        cmo.setListenPort(port)
        activate()

#=========MAIN PROGRAM =========================
name=raw_input('Please enter managed server:')
listenip=raw_input('please enter listenip:')
port=int(input('please enter port:'))
createMS(name, listenip, port)

Script best practices says all the domain parameters must be generic and develop using propertice file.
try it yourself :)

The output of the above script

pavanbsd@ubuntu:~/pybin$ wlst createms.py

Initializing WebLogic Scripting Tool (WLST) ...

Welcome to WebLogic Server Administration Scripting Shell

Type help() for help on available commands

Please enter managed server:BAms2
please enter listenip:192.168.1.106
please enter port:9102
Connecting to t3://192.168.1.106:9100 with userid weblogic ...
Successfully connected to Admin Server "BA_admin" that belongs to domain "BAdomain".

Warning: An insecure protocol was used to connect to the
server. To ensure on-the-wire security, the SSL port or
Admin port should be used instead.

Location changed to edit tree. This is a writable tree with
DomainMBean as the root. To make changes you will need to start
an edit session via startEdit().

For more help, use help('edit')
You already have an edit session in progress and hence WLST will
continue with your edit session.

Starting an edit session ...
Started edit session, please be sure to save and activate your
changes once you are done.
Activating all your changes, this may take a while ...
The edit lock associated with this edit session is released
once the activation is completed.
Activation completed

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