Month: June 2021

Uninstall docker from Ubuntu

If you installed docker with snap:

simple uninstall:

sudo snap remove docker

and to disable automatic snapshot:

sudo snap remove --purge docker

If after reinstalling docker you have the following error:

bash: /snap/bin/docker: No such file or directory

you need to run

hash docker

and 

hash docker-compose

Installation instruction:

https://docs.docker.com/engine/install/ubuntu/

Note that if you installed an old version with snap, you should follow the instruction provided in this article.

https://docs.docker.com/compose/install/

Log integer in beanshell and get integer from variables

Issue:

log.info() returns the following error in JMeter beanshell:

 Error in method invocation: Method info( int ) not found in class'org.apache.logging.slf4j.Log4jLogger'

Solution:

The error message indicates you are trying to pass an integer in the log.info() method. To prevent this issue, convert the integer to the type String using:

String SomeString = new Integer.toString(somInteger);

Similarly, numerals are passed as strings in JMeter variables, to make arithmetic operation on them, you’ll need to convert them to integer using:

int someInteger = new Integer.parseInt(someString);

Example use:

vars.put("test", new Integer(i).toString());

yarn : ERROR: There are no scenarios; must have at least one. On Ubuntu

Issue: The following error is displayed when running yarn in the same directory as the package.jsnon file: 

00h00m00s 0/0: : ERROR: There are no scenarios; must have at least one.

Solution:

this is the wrong yarn, ubuntu install cmdtest.

Run: 

sudo apt remove cmdtest
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add - echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list 
sudo apt update 
sudo apt install yarn