I am running Jmeter performance test in distributed mode (2 slaves + master). In my test script I have configured Summary
Report which should save some data to csv file.
This file location is configured with fixed name "reports/summary.csv" value.
When I connect successfully from master to both slaves, tests finish on slaves, but no data is returned to master directory "reports/summary.csv". When I was running setup with one slave and master, master was collecting this data. What could be the problem when I have 2 slaves? Name conflict maybe?
Actually this problem was related to "jmeter-server" process not being able to connect to master using RMI. This network issue caused my jmeter-server to hang for decade on second node, and this stopped master node jmeter process from finnishing and finalizing results in mentioned summary file.
After I got it working, important thing to know is if you use SummaryReport or AggregateReport jMeter component in your testplan in distributed env., master will take care of collecting data from each slave.
Related
Im running Jmeter test with one master machine and slave system. The issue is Im not getting the results from the slave system, even though I could see the test has started and finished in slave system.
I tried running another Jmeter test with a different script & same configuration and fortunately Im able to get the results from the slave system.
Im not able to understand why the first scenario is not working and where exactly is the issue. Kindly help me out.
From your screenshots I can only state that the test didn't produce a single SampleResult because it didn't execute any Sampler, the most common reasons are:
Your test is using CSV Data Set Config and you forgot to copy the CSV file on slave machines. JMeter master only transfers the .jmx test plan to slaves, everything else needs to be copied manually
Basically a subset of point 1: your test plan relies on a JMeter Plugin which is not present on the slaves. If this is the case - install the missing plugin(s) using the JMeter Plugins Manager
The exact failure reason can be found in jmeter.log file on master machine and jmeter-server.log files on slave machines.
I have 1 master and 2 slave machines setup. I want to create two separate summary report, one for each slave.
I know the question in duplicate of this question, but the solution provide does not work for me.
JMeter Slave Reporting in Distributed Testing
In my test plan I have summary report and have added "filename"(or complete path) under write results to file.
When I execute my test plan, result file is saved in master system with combined results of both the slaves. How can I get the response times of the requests executed with each slaves separately?
If you add a Listener to your Test Plan and configure it to save results into a file it will create a results file on each slave machine so once your test is done you will be able to fetch these results file from slaves and perform required analysis.
Assuming your configuration is good you should have 1 cumulative result on master and 2 separate results on each slaves.
Another option is using __machineName() or __machineIP() function as a sampler label prefix (or postfix) so you will be able to distinguish samplers coming from different slaves in the main .jtl results file. This approach will allow you to avoid unnecessary disk IO overhead during test execution required to generate an extra file with the results.
Once you test finishes you will be able to split main .jtl results file using Filter Results Tool to generate separate results files per slave basing on slave machine hostname or IP address.
You can install Filter Results Tool using JMeter Plugins Manager:
About JMeter Distributed configuration for load testing (not in cloud),
I can setup X JMeter masters in different machines and execute them with shared files using shared folder(s).
The benefits are:
Each master is oblivious to other and can be shutdown and start when needed with dynamic/different properties.
Each master have its own logs and results that can be explored separately.
I don't need network connection between JMeter masters' machines.
What are the benefits for using master-slave configuration in such case? It seems like an unnecessary overhead when focusing on load test.
The benefits are:
centralization of results on 1 node (master), you can follow results in Summarizer from the master node, you have the CSV/XML file generated there and you can generate the web report at end of test using this
centralization of jmx plan on 1 node (master)
synchronization of the test from master, ie the master will start/stop the test from master
Besides the drawbacks you describe there are:
- network configuration complexity
- need to deploy csv on each node (although there are options with plugins (redis, simple table server)
- network traffic between nodes and master
It was created at time deployment automation was not available through things like vagrant, ansible, cloud ...
I am performing distributed testing using JMeter and getting collective result of all slaves on Master JMeter GUI.
Please let me know if it is possible to capture separate reports for each slave?
For example, I have configured 2 Slaves + 1 Master JMeter. On executing the test, I would like capture separate report of each slave.
Thanks!!
You can get per-slave results as follows:
Add a Listener or your choice to Test Plan
Specify Filename in "Write results to file" section and choose what you need to store via "Configure" button
Once test finishes you'll have to collect result files from slave machines
Be aware that:
By default not everything can be stored, i.e. response data is being removed form successful samples
Listeners have their cost. See Greedy Listeners - Memory Leeches of Performance Testing to get an idea regarding impact and why it is better to have them off during load test.
For your case, don't use distributed testing, just launch 1 separate JMeter per slave machine.
I have configured two slaves and one master machine.
After executing the performance test in Jmeter using the master slave architecture on master machine, I am getting the result log in slaves machines but I need a consolidated log summary. Please suggest me how can I get it?
Also, I need to know that how the load is distributed over the slave machines.
First question:
If you are talking about the logs (as in jmeter-server.log) there's no automatic way to collect them all. You could write a bash script or something similar to collect them from the servers.
Second question:
Every slave machine executes the full test plan completely on their own. That means that if you configure your test plan to include 10 threads, every slave will run with 10 threads giving you a total of 20.