NoSuchMethodError on com.google.common.base

[aleksandar-spasojevic]

Dear All,

I've tried to use this plugin, but failed to do so. A basic example on Mac OS X (10.15.4):

• download repo
• execute mvn clean install in root folder with java 1.8.232 (Zulu)
• move jmeter-grpc-client-sampler.jar to _{jmeterhome}/lib/ext
• go to docs/example/grpc-lib
• put my measurements.proto into src/main/proto

syntax = "proto3";

option java_multiple_files = true;
option java_package = "ch.zhaw.grpc";
option java_outer_classname = "Measurements";
option objc_class_prefix = "HLW";

package ch.zhaw.grpc;

import "google/protobuf/timestamp.proto";

service MeasurementsService {
  rpc send (MeasurementsRequest) returns (MeasurementsReply) {}
}

message MeasurementsRequest {
  google.protobuf.Timestamp timeValue = 1;
  int32 value = 2;
}

message MeasurementsReply {
  string timeValue = 1;
  int32 value = 2;
}

• execute mvn clean install with java 1.8.232 (Zulu)
• move grpc-lib-0.0.1.jar to _{jmeterhome}/lib/ext

Now make a Test Plan in order to try a GRPC Sampler, which fails due to missing Method. The funny thing is, if I execute in the very same session once again, I get an other error, namely

First try

Second try (in the same session, just seconds after

Best regards Aleks

[thoainguyen]

Hi, Thanks for your detailed description, your issue may be due to incompatible dependencies Try to recompile jmeter-grpc-client-sampler.jar:

• Change version com.google.guava in pom.xml to the newer:

      <dependency>
          <groupId>com.google.guava</groupId>
          <artifactId>guava</artifactId>
          <version>28.2-jre</version>
      </dependency>

• In requestBuilderCode, add import java.time.Instant;

[aleksandar-spasojevic]

Hi there, thanks for your prompt response 👍. I haven't mentioned: I am using JMeter 5.2.1 installed via brew install jmeter. I tried so, but without any success:

I still get the very same error message

[thoainguyen]

Hi @aleksandar-spasojevic, sorry for the late response, The JMeter which you installed via brew install jmeter maybe contains another dependency that causes this problem, Do you try to install the new one or portable one in here ?

Best regards Thoai Nguyen

[aleksandar-spasojevic]

Hi @thoainguyen thanks for your response. Since I have the urge to load test (bachelor thesis) my application, I was forced to do my tests in https://locust.io . Due to the current situation, I am not able to investigate further. I hope you understand. Best regards Aleks