JMeter script FAQs

1、 Use http cookie manager Get the... In the response header of the login interface cookie value ,cookie The reference variable name is correct , But what we get cookie No entry into force , Still reporting a mistake 401 reason ：bin In the catalog jmeter properties File default cookiemanager.save.cookies=false, Acquired cookie Value not saved solve ： Remove the comment from this line , Change to cookiemanager.save.cookies=true

2、 Run the login interface in batch to obtain a batch of valid cookie data , The login account and password are correct and not repeated , But the obtained part cookie Always expired reason ： Used 2000 Account number and password , Keep running 5min, This leads to the recycling of these accounts and passwords , Resulting in partially generated cookie Be overwritten solve ： In thread group loop count Not set to -1, It is set to the number of times , Run as many times , Ensure that each account generates a unique cookie

3、 Use csv Data files guarantee script parameterization , But from the dependent file uid The field value is incorrect , Still uid Isoparametric name reason ： The parameter name is set in the first line of the dependent file , And in the csv The first row of... Is ignored in the setting false solve ： When the parameter name is set in the first line of the dependent file ,csv The first line selection... Is ignored in the data file settings true; The parameter name is not set in the first line of the dependent file ,csv set selection false

4、coding Platform operation jmeter Script , Completion of task construction during pressure test , The script doesn't work reason ： The script uses csv Data files , stay coding The file path is written incorrectly when executing on the platform ：jmeter/xxx.csv solve ： Change the path to /jmeter/xxx.csv, Here's the absolute path

5、coding Platform operation jmeter Script , After the pressure test grafana No pressure measurement data can be seen on the panel reason ： The pressure test cluster of this project is configured with multiple namespaces , Only defalut Under the configuration of grafana Monitor dashboard , So in addition to defalut outside , Results executed under other namespaces are not displayed solve ： Put... In the back-end listener influxdbUrl from http://jmeter-influxdb:8086/write?db=jmeter Change to ：http://jmeter-influxdb.default:8086/write?db=jmeter

6、 The backend listeners under two different thread groups are set to Baidu 1 And baidu 2 Value , After operation grafana All the pressure test results in the panel are displayed in Baidu 1 in , Baidu 2 The data in is empty reason ：jmeter A pit in ！ In the source code “ Back end listener ” This name determines whether the listener is running （ Instead of its set value ）, Because each thread group is consistent by default , Therefore, not actively changing the name here will cause all the listening data to be mixed in the first one solve ： Different backend listeners have different names , for example ： Back end listener -1： Baidu 1, Back end listener -2： Baidu 2 etc.

7、 The script dependency file is too large to upload to coding platform , adopt git Upload files ,push I always report mistakes when I'm on duty ：rejected reason ： The code inconsistency between the remote library and the local library results in solve ： In execution push Before the command , Merge updates from the remote library to the local , Execute the following command ：git pull --rebase origin master