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Remote Distribution Load Testing in JMeter

Following are the troubleshooting steps to implement remote distribution load testing in JMeter.

  • Same version of JMeter in master and worker
  • Same version of Java in master and worker
  • Master should be able to ping worker, vice-versa
  • Master and Worker machines must be on the same sub-network. Here is the calculator to check.
  • Firewall should be disabled
  • Anti-virus might need to be turned off
  • Delete the unnessary network interfaces in Windows to avoid the network related issues
  • By default, JMeter uses SSL in RMI.
  • SSL for RMI certificate has the validity of 7 days by default, make sure you generate the certificate once in 7 days. The number of days can be changed in the create-rmi-keystore file: keytool -genkey -keyalg RSA -alias rmi -keystore rmi_keystore.jks -storepass changeit -validity 7 -keysize 2048 %*
  • Place the generated certificate in all the worker nodes
  • If the test plan uses, plugins, make sure it is available in the worker nodes.
  • Troubleshoot the remote testing by disable SSL in jmeter.properties

Windows Troubleshooting

Make sure you enabled only below connections in your network.

image

image

Commands

jmeter.properties in Master

remote_hosts=<WorkerIP>
server.rmi.ssl.disable=true
server.rmi.localport=4000

Starting Worker Machine

./jmeter-server -Djava.rmi.server.hostname=<Worker_IP>

Sample Output

Using local port: 4000
Created remote object: UnicastServerRef2 [liveRef: [endpoint:[192.168.0.99:4000](local),objID:[59f63471:179a76f79c7:-7fff, -5372372549273377610]]]

Starting Tests Master Machine

jmeter.properties/user.properties in Worker

server.rmi.ssl.disable=true
server.rmi.localport=4000

cd into JMeter folder

./jmeter.sh -Djava.rmi.server.hostname=<Master_IP> -n -t examples/CSVSample.jmx -l Run1.log -R<Worker_IP>

Sample Output in Master

Creating summariser <summary>
Created the tree successfully using examples/CSVSample.jmx
Configuring remote engine: 192.168.0.99
Using local port: 4000
Starting distributed test with remote engines: [192.168.0.99] @ Wed May 26 02:50:45 EDT 2021 (1622011845669)
Remote engines have been started:[192.168.0.99]
Waiting for possible Shutdown/StopTestNow/HeapDump/ThreadDump message on port 4445
summary =     12 in 00:00:04 =    3.3/s Avg:   234 Min:   123 Max:   326 Err:     0 (0.00%)
Tidying up remote @ Wed May 26 02:50:51 EDT 2021 (1622011851137)

Sample Output in Worker

Starting the test on host 192.168.0.99 @ Wed May 26 02:50:47 EDT 2021 (1622011847465)
Finished the test on host 192.168.0.99 @ Wed May 26 02:50:51 EDT 2021 (1622011851480)

Disabling Firewall in CentOS

To check the status:

sudo firewall-cmd --state

To stop the firewall:

sudo systemctl stop firewalld