Jmeter Mongo Db insert script is not adding iterations from csv data set - jmeter

Question

CSV set as below
enter image description here
Jmeter insert mongo DB script is as below
import com.mongodb.*
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoClient;
import com.mongodb.MongoClientSettings;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;
import java.util.Arrays;
try {
MongoCollection<Document> collection = vars.getObject("collection");
Document document = new Document("_id", "${_id}")
.append("has_mortgages",false)
.append("data", new Document ("etag":"${_etag}")
.append("links", new Document ("charges","/company/${_id}/charges"))
);
collection.insertOne(document);
}
catch (Exception e) {
SampleResult.setSuccessful(false);
SampleResult.setResponseCode("500");
SampleResult.setResponseMessage("Exception: " + e);
}
Thread group - no.of threads is 1 and loop count is 3
While running the script the first iteration is picking the value of _id as PT000001 and inserting the record. While
second iteration is picking up the _id correctly from the csv which is PT000002 but the
collection.insertOne(document); is still adding the _id PT000001
Can some one please tell me what is wrong with my script??

Answer 1

Take a look at JSR223 Sampler documentation:
The JSR223 test elements have a feature (compilation) that can significantly increase performance. To benefit from this feature:
Use Script files instead of inlining them. This will make JMeter compile them if this feature is available on ScriptEngine and cache them.
Or Use Script Text and check Cache compiled script if available property.
When using this feature, ensure your script code does not use JMeter variables or JMeter function calls directly in script code as caching would only cache first replacement. Instead use script parameters.
so you need to change "${_id}" to vars.get('_id') and "${_etag}" to vars.get('_etag') and your script will start working as expected.
vars stands for JMeterVariables class instance, see the JavaDoc for all available functions and Top 8 JMeter Java Classes You Should Be Using with Groovy for more information on this and other JMeter API shorthands available for the JSR223 Test Elements.

Answer 2

Resolved after unchecking the below check from sampler
Cache compiled script if available