![]() ![]() It allows the client to make several HTTP requests over single TCP connection. Keep-Alive is very important feature of HTTP protocol. $Boolean=true Recommendation #9: Enable HTTP Keep-Alive on web servers To enable the stale connection check, set the following property in user.properties: ![]() This step should be used when receiving “Socket Closed” exceptions during JMeter test runs. To avoid issues with HTTP connection pooling, it may be necessary to enable a stale connection check in JMeter. Httpclient4.retrycount=1 Recommendation #8: Enable stale connection check To retain SSL context for the duration of test: Set the properties below in the jmeter.properties to adjust the way that JMeter handles SSL sessions, protocols and ciphers: =sample Recommendation #7: Tweak JMeter SSL configuration # Keystore properties (client certificates) If your application requires SSL client certificate authentication or authorization, you will need to create a keystore and set the following properties in the system.properties file pointing to that keystore: # Truststore properties (trusted certificates) To remedy this, modify system.properties and configure the truststore with the relevant signer certs. If you have internally-signed or self-signed certificates on your application server tier, JMeter will need to be configured to recognize those certificates as valid. Recommendation #6: Configure trusted and client SSL certs If many users are to be simulated, it’s recommended to disable parallel downloads as JMeter does not simulate browser’s cache and browsers don’t re-download embedded resources on subsequent requests. If there are many users, too many threads may get created and start affecting the response times adversely due to bandwidth contention at the JMeter side. JMeter uses more resources to simulate the browser parallel fetching of embedded resources like css, gif, js and static content. Recommendation #5: Disable Parallel Downloads This allows for a very large total number of threads, provided that not too many are active concurrently. JMeter has an option to delay thread creation until the thread starts sampling (i.e., after any thread group delay and the ramp-up time for the thread itself). Individual sampler Connection timeout will override the ‘HTTP Request Default’ connection timeout value. In order to specify individual Connection Timeout, then specify in same field of each sampler. If this ‘HTTP Request Default’ is added at Test Plan level, then it will be applied to all samplers and all thread groups. In this ‘HTTP Request Default’, there is an option – Connect in ‘Timeouts (milliseconds)’ Specify your connection timeout value in this field and it will be applied to all child samplers. For example, set to 60000 (milliseconds) to increase the overall timeout to 60 seconds.Īdd a ‘HTTP Request Default’ configuration element from the ‘Configuration Elements’ option (i.e., Right-click test plan and add this ‘HTTP Request Default’). To do so, specify a higher connection timeout the HTTP Request object in your JMeter test plan. To help diagnose and resolve socket connection issues, it is often helpful to increase this value. ![]() The default connection timeout in JMeter is 20 seconds out-of-the-box. To enable debug mode for context and wire logging via log4j2.xml: Recommendation #3: Set Connection timeout To increase the log level to DEBUG via the JMeter menu: Recommendation #2: Enable DEBUG mode in JMeterĪdd the following like to jmeter.properties to enable the JMeter Logger Panel: It is highly recommended to use the most recent version, to leverage new improvements and components.Īvoid using versions that are older than 3 versions before the last one. Non HTTP response code: Non HTTP response message: Read timed out Recommendation #1: Use latest version of JMeter Non HTTP response code: Non HTTP response message: connect timed out Non HTTP response code: Non HTTP response message: Connection reset This article highlights how to overcome these connection-related errors by configuring and tuning JMeter accordingly.Įxamples of error messages that indicate SSL socket issues in Jmeter include the following: When executing performance and/or load testing against an SSL-enabled application using Apache JMeter, SSL socket errors can be a frequently encountered nuisance which can severely hinder your testing efforts. ![]()
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