Wednesday, March 18, 2015

Fixing Error: Could not find a suitable provider in Puppet

I'm quite new to Puppet and I had a Puppet script which configures a MySQL database working fine on a Puppet learning VM on VirtualBox. This issue happened when I installed a and setup Puppet on a server of my own. I kept seeing the following error and it was driving me crazy for some time.

[hesxxxxxxx@xxxxxxpocx ~]$ sudo puppet apply --verbose --noop /etc/puppet/manifests/site.pp 
Info: Loading facts
Info: Loading facts
Info: Loading facts
Warning: Config file /etc/puppet/hiera.yaml not found, using Hiera defaults
Notice: Compiled catalog for xxxxxxxxxxxxxxxxxxx in environment production in 0.99 seconds
Warning: The package type's allow_virtual parameter will be changing its default value from false to true in a future release. If you do not want to allow virtual packages, please explicitly set allow_virtual to false.
   (at /usr/lib/ruby/site_ruby/1.8/puppet/type/package.rb:430:in `default')
Info: Applying configuration version '1426611197'
Notice: /Stage[main]/Mysql::Server::Install/Package[mysql-server]/ensure: current_value absent, should be present (noop)
Notice: /Stage[main]/Mysql::Server::Install/Exec[mysql_install_db]/returns: current_value notrun, should be 0 (noop)
Notice: Class[Mysql::Server::Install]: Would have triggered 'refresh' from 2 events
Notice: /Stage[main]/Mysql::Server::Config/File[mysql-config-file]/content: current_value {md5}8ace886bbe7e274448bc8bea16d3ead6, should be {md5}d0d209eb5ed544658b3f1a72274bc3ed (noop)
Notice: /Stage[main]/Mysql::Server::Config/File[/etc/my.cnf.d]/ensure: current_value absent, should be directory (noop)
Notice: Class[Mysql::Server::Config]: Would have triggered 'refresh' from 2 events
Notice: /Stage[main]/Mysql::Server::Service/Service[mysqld]/ensure: current_value stopped, should be running (noop)
Info: /Stage[main]/Mysql::Server::Service/Service[mysqld]: Unscheduling refresh on Service[mysqld]
Notice: /Stage[main]/Mysql::Server::Service/File[/var/log/mysqld.log]/ensure: current_value absent, should be present (noop)
Notice: Class[Mysql::Server::Service]: Would have triggered 'refresh' from 2 events
Error: Could not prefetch mysql_grant provider 'mysql': Command mysql is missing
Notice: /Stage[main]/Main/Node[default]/Mysql_grant[m_user@localhost/lvm.*]: Dependency Mysql_user[m_user@localhost] has failures: true
Warning: /Stage[main]/Main/Node[default]/Mysql_grant[m_user@localhost/lvm.*]: Skipping because of failed dependencies
Notice: Stage[main]: Would have triggered 'refresh' from 3 events
Error: Could not find a suitable provider for mysql_user
Error: Could not find a suitable provider for mysql_database

The issue was I was running puppet with —noop mode. When my Puppet tries to configure the mysql setup it gives errors because it didn’t have a mysql setup to configure since I had —noop. Removing this did the trick.

Although this is trivial, I thought of blogging this because someone might find this useful when facing the same issue as I did.

Monday, February 2, 2015

Resolving EACCES error when using Angular with Yeoman

In one of my earlier posts, I discussed installing NodeJS, NPM and Yeoman. Although the setup was good to start off my initial work, it was not was giving me the following error when trying to install Angular generator. Following post describe how to resolve this error.


    |       |    .------------------------------------------.
    |--(o)--|    | Update available: 1.4.5 (current: 1.3.3) |
   `---------´   |     Run npm install -g yo to update.     |
    ( _´U`_ )    '------------------------------------------'
     |  ~  |     
 ´   `  |° ´ Y ` 

? 'Allo Heshan! What would you like to do? Install a generator
? Search NPM for generators: angular
? Here's what I found. Install one? angular
npm ERR! Darwin 14.0.0
npm ERR! argv "node" "/usr/local/bin/npm" "install" "-g" "generator-angular"
npm ERR! node v0.10.33
npm ERR! npm  v2.1.11
npm ERR! path /Users/heshans/.node/lib/node_modules/generator-angular/
npm ERR! code EACCES
npm ERR! errno 3

npm ERR! Error: EACCES, unlink '/Users/heshans/.node/lib/node_modules/generator-angular/'
npm ERR!  { [Error: EACCES, unlink '/Users/heshans/.node/lib/node_modules/generator-angular/']
npm ERR!   errno: 3,
npm ERR!   code: 'EACCES',
npm ERR!   path: '/Users/heshans/.node/lib/node_modules/generator-angular/' }
npm ERR! 
npm ERR! Please try running this command again as root/Administrator.
npm ERR! error rolling back Error: EACCES, unlink '/Users/heshans/.node/lib/node_modules/generator-angular/'
npm ERR! error rolling back  { [Error: EACCES, unlink '/Users/heshans/.node/lib/node_modules/generator-angular/']
npm ERR! error rolling back   errno: 3,
npm ERR! error rolling back   code: 'EACCES',
npm ERR! error rolling back   path: '/Users/heshans/.node/lib/node_modules/generator-angular/' }

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/heshans/Dev/projects/myYoApp/npm-debug.log

It was due to a permission error in my setup. I tried giving my user the permission to access those files but it still didn't resolve the issue. Then I decided to remove my existing NodeJS and NPM installations. Then I used the following script by isaacs with slight modifications. It worked like a charm. Then I was able to successfully install AngularJS generator to Yeoman.

PS : Also make sure that you have updated your PATH variable in your ~/.bash_profile file.
export PATH=$HOME/local/bin:~/.node/bin:$PATH

Tuesday, December 9, 2014

Install the Yeoman toolset

1. Prerequisite: Node.js and NPM should be installed in the system.

2. Install Yeoman tools
heshans@15mbp-08077.local:~/Dev$npm install --global yo bower grunt-cli

3. Check installed versions.
heshans@15mbp-08077.local:~/Dev$yo --version && bower --version && grunt --version



grunt-cli v0.1.13

Install Node.js and NPM on Mac OSX

I’m using Homebrew for the installation. If you don't have it installed, please install it.

1. Install node
heshans@15mbp-08077.local:~/Dev$brew install node

2. Check installed versions.
heshans@15mbp-08077.local:~/Dev$node -v


heshans@15mbp-08077.local:~/Dev$npm -v


3. Update Homebrew.
heshans@15mbp-08077.local:~/Dev$brew update 

Already up-to-date.

4. Upgrade Node.
heshans@15mbp-08077.local:~/Dev$brew upgrade node

Wednesday, October 15, 2014

How to find which method called the current method at runtime

I’m using the following helper class to find which method called the current method (at runtime.)

import java.lang.reflect.Method;

public class TraceHelper {
    private volatile static Method m;
    private static Throwable t;

    public TraceHelper() {
        try {
            m = Throwable.class.getDeclaredMethod("getStackTraceElement", int.class);
                    new PrivilegedAction() {
                        public Object run() {
                            return null;
            t = new Throwable();
        } catch (Exception e) {

    public String getMethodName(final int depth, boolean useNew) {
        return getMethod(depth, t != null && !useNew ? t : new Throwable());

    public String getMethod(final int depth, Throwable t) {
        try {
            StackTraceElement element = (StackTraceElement) m.invoke(t, depth + 1);
            return element.getClassName() + "$" + element.getMethodName();
        } catch (Exception e) {
            return null;

Then I use the following code inside my aspect to get the name of the method which called my current (executing) method.
String previousMethodName = new TraceHelper().getMethodName(2, false);

Include/exclude sources when using aspect-maven-plugin

AspectJ mavn plugin will add all .java and .aj files in the project source directories by default. By using <include/> and <exclude/> tags, you can add filtering on top of that. 



Tuesday, October 14, 2014

Stackmap frame errors when building the aspectj project with Java 1.7

I had a project which used aspectj and it was building fine with Java 1.6. When I updated it to Java 1.7 I saw the following error.

[INFO] Molva the Destroyer Aspects ....................... FAILURE [2.324s]
[INFO] Molva The Destroyer Client ........................ SKIPPED
[INFO] Molva The Destroyer Parent ........................ SKIPPED
[INFO] Molva The Destroyer Distribution .................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.424s
[INFO] Finished at: Tue Oct 14 11:16:19 PDT 2014
[INFO] Final Memory: 12M/310M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.1:java (default) on project molva-the-destroyer-aspects: An exception occured while executing the Java class. Expecting a stackmap frame at branch target 30
[ERROR] Exception Details:
[ERROR] Location:
[ERROR] com/concur/puma/molva/aspects/TestTarget.main([Ljava/lang/String;)V @12: invokestatic
[ERROR] Reason:
[ERROR] Expected stackmap frame at this location.
[ERROR] Bytecode:
[ERROR] 0000000: 2a4d b200 5e01 012c b800 644e b800 c62d
[ERROR] 0000010: b600 ca2c 2db8 00bb 2db8 00bf 57b1 3a04
[ERROR] 0000020: b800 c62d 1904 b600 ce19 04bf
[ERROR] Exception Handler Table:
[ERROR] bci [12, 30] => handler: 30
[ERROR] -> [Help 1]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1]

My maven configuration looked like below.



The default compliance level for aspectj-maven-plugin is 1.4 according to Since I did not have that tag specified, the build was using the default value. Once I inserted the tag into the configuration, the build was successful.