jmeter测试遇到过的坑

1.在linux环境执行脚本时，一直报错，问题是不清楚报的什么问题，只能看到很少的日志，但是接口又是通的（有CSV Data Set Config组件时）

# cat log.jtl 
timeStamp,elapsed,label,responseCode,responseMessage,threadName,dataType,success,failureMessage,bytes,sentBytes,grpThreads,allThreads,URL,Latency,IdleTime,Connect
1574846769407,33,HTTP请求,200,OK,线程组 1-1,text,false,"Test failed: text expected to contain /""code"":10000/",161,227,1,1,http://xxxxx/image/lrr271,33,0,21

# jmeter -n -t lrr1.jmx -l log.jtl
Creating summariser <summary>
Created the tree successfully using lrr20mubiao1.jmx
Starting the test @ Wed Nov 27 17:26:09 CST 2019 (1574846769002)
Waiting for possible Shutdown/StopTestNow/HeapDump/ThreadDump message on port 4445
summary =      1 in 00:00:00 =    5.5/s Avg:    33 Min:    33 Max:    33 Err:     1 (100.00%)
Tidying up ...    @ Wed Nov 27 17:26:09 CST 2019 (1574846769449)
... end of run

Body Data中的json引用的变量未加大括号$W

 <stringProp name="Argument.value">{&quot;base64&quot;:&quot;$w&quot;}</stringProp>

最后发现问题：json格式，上传base64码，Body Data中的json引用的变量必须要加大括号，{"base64":"${w}"}；

<stringProp name="Argument.value">{&quot;base64&quot;:&quot;${w}&quot;}</stringProp>

最后执行成功

# jmeter -n -t lrr20mubiao1.jmx -l log.jtl
Creating summariser <summary>
Created the tree successfully using lrr20mubiao1.jmx
Starting the test @ Wed Nov 27 17:39:00 CST 2019 (1574847540263)
Waiting for possible Shutdown/StopTestNow/HeapDump/ThreadDump message on port 4445
summary +      1 in 00:00:01 =    1.9/s Avg:   368 Min:   368 Max:   368 Err:     0 (0.00%) Active: 1 Started: 1 Finished: 0
summary =      1 in 00:00:01 =    1.9/s Avg:   368 Min:   368 Max:   368 Err:     0 (0.00%)
Tidying up ...    @ Wed Nov 27 17:39:01 CST 2019 (1574847541089)
... end of run

总结：上传base64码，body中引用变量，必须加大括号{}；但是上传文字未加大括号也是可以的

2.body中带汉字，一定加编码utf-8,否则报参数不合法。