Sunday, 16 June 2019

How to approach Traffic Parrot speed issues during load testing

We had one of our prospects reach out to us this week:

"I am stuck with my POC (Proof Of Concept project) on Traffic Parrot as I am facing out of memory issues at 30 TPS for 100 concurrent users for HTTP and IBM MQ JMS, please advise." -  Test Automation and Service Virtualization Consultant at an Australian Bank

Typically we advise starting by having a look at common approaches to speeding up Traffic Parrot for performance testing which is located here:

If the guidelines outlined there do not resolve the issue, please contact, and we will suggest how we can improve the performance of Traffic Parrot in your specific use case.

In this particular case increasing the memory from -Xmx128mb to -Xmx1g (Traffic Parrot JVM heap size increase from 128MB to 1GB) in jvm.args resolved the issue. The issue was that the request to response mappings used by the prospect were complex enough to require higher than standard use of memory for 100 concurrent users.

Saturday, 15 June 2019

I want to learn Service Virtualization

"I want to learn Service Virtualization for mocking. How can I do that?" - An anonymous website visitor.

We recommend looking at the Service Virtualization and API mocking tutorials available on our website, starting with Chapter 1: Getting started with stubbing, mocking and service virtualization and then Chapter 2: How to record and replay HTTP SOAP requests and responses to create API mocks.

If you would like to schedule a free 45-minute "Service Virtualization and API mocking" webinar for your company or your team, please reach out to, and we will organise it at a time convenient to you and your team.

Wednesday, 12 June 2019

Do you have single user licenses?

Recently a website visitor asked:

"Do you have single user licenses?" - QA Lead at a Russell 3000 company, Pennsylvania.

Yes, we do support the single user scenario. For a single user, we have an option for a single floating license (only one instance allowed to be running at the same time).

If you are interested in single user licenses, we would be happy to provide a quote according to your requirements. Please contact for more information.

Friday, 31 May 2019

Error 2085 when creating IBM MQ mocks

Recently we have received a query from an engineer evaluating Traffic Parrot:

"Hi! I am trying to do an MQ stub, but facing some issues. I get an error code 2085, can you please help me out?" - Software Engineer at a Bank, Australia.

Typically error 2085 means the queue or topic your application or Traffic Parrot connects to does not exist on the IBM MQ broker.

It will be hard to help more just by looking at the error code alone. If you see an error like this, please contact to schedule a quick call with screen sharing to resolve your issue.

Here is a tutorial of JMS IBM MQ:
Here is a video tutorial JMS IBM MQ: 
Here are the docs for JMS:
Here is how you can run IBM MQ on Docker for development and testing purposes:

Tuesday, 28 May 2019

Is there a free version of Traffic Parrot?

Recently we have received a query from one of our website visitors:

"Hello! Is there free version of Traffic Parrot available?" - Software Engineer at a Software Consultancy, Ukraine.

We do not offer a free version, however, we do have a 14-day trial available.

If you are interested in the enterprise edition, we would be happy to set up a call to discuss budgetary pricing according to your requirements, please contact

Alternatively, you can compare the open source tools available on Wikipedia.

Thursday, 4 April 2019

Service Virtualization Test Container Pattern

Traffic Parrot has first-class support for the Service Virtualization Test Container Pattern (also called API Mock Test Container or API Simulation Test Container)

Let's assume if you work with a Jenkins Continuous Integration pipeline and test your microservices there to get to production fast. The more external dependencies the build pipeline has, the more risk you have those dependencies will cause the build to be unstable and fail because of external dependency issues, not related to the code quality. External dependencies should be kept to a minimum. For example, run your database in Docker per build (on Jenkins Slave), not in a shared environment. It is a pattern similar to the "sidecar" container pattern recommended by Jenkins just used in tests.

We recommend running your API mocks in the same process as your tests (and using Service Virtualization As Code - API Mocking As Code). If you decide to run your API mocks or virtual services in a separate process though, run them in a docker container. This way you are taking your automation to the next level, you have a fully automated and reproducible build pipeline.
Because of issues with dependencies, avoid using centralized instances running API mocks and virtual services outside your build pipeline. You can use them for exposing mocks to other teams and departments and for manual exploratory testing, but not in your automated CI builds.

Running in a container like Docker also means you are doing Infrastructure as code with all of its benefits to your business.

Friday, 29 March 2019

How to run Traffic Parrot behind a firewall? How to use a proxy?

Recently one of the Traffic Parrot users asked us:

"When I try to capture traffic from a HTTP API it does not register anything or generate an error, it just does not capture anything. I have a proxy in my company, but I can not find how to tell the application to go through that proxy to make the recording. Please advise." - A developer at a Colombian bank

Are you running Traffic Parrot inside an organisation where you have to use a HTTP Proxy to access APIs?

No problem!

You can find documentation here how to use a HTTP Proxy here:

Friday, 15 March 2019

How to add requests and responses manually

A user recently asked us this good question.

> I would like to know your inputs for below query: if we do not have any restful API details apart from one URI and one set of Request and response.
> That to URI is not accessible in our dev cloud. then we do not have any recording url for that to put on since it is not accessible. How can we do virtualization here using traffic parrot

You can add requests and responses manually to Traffic Parrot by clicking on HTTP->Add/Edit.

Monday, 4 March 2019

Delaying JMS messages in IBM MQ or Active MQ (mocking and service virtualization)

Starting from version 4.4.0 Traffic Parrot supports delayed JMS messages.

Here is the documentation how to enable delayed messages:

It is useful in scenarios like performance testing, when you would like to simulate a dependency system that takes a while to process messages asynchronously and its impact on your systems performance.

Wednesday, 13 February 2019

Tutorial: Mocking and simulating gRPC APIs

gRPC is an open source protocol used for remote procedure calls which was initially developed at Google. Traffic Parrot support gRPC service virtualization and API mocking.

If you would like to learn more have a look at the new tutorial Chapter 5: Mocking and simulating gRPC.

Saturday, 19 January 2019

Tutorial: How to use Traffic Parrot APIs

Sometimes developers would like to configure Traffic Parrot programmatically. You can do that using Traffic Parrot APIs.
Have a look at the video below for more details. Here is the Postman collection that should allow you to explore what APIs are available. Here you can also find the Swagger/OpenAPI documentation of the APIs.