gRPC with jmeter is not working in alpinejmeter:5.6.3 image - Stack Overflow

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I was able to run the jmeter http sampler request script in Kubernetes, but when I try with the gRPC request, I get the below error:

2025-01-08 10:33:25,530 ERROR v.z.b.GRPCSampler: java.lang.RuntimeException: Unable to resolve service by invoking protoc: 
Unable to execute protoc binary
        at vn.zalopay.benchmark.core.ClientCaller.init(ClientCaller.java:88)
        at vn.zalopay.benchmark.core.ClientCaller.<init>(ClientCaller.java:53)
        at vn.zalopay.benchmark.GRPCSampler.initGrpcClient(GRPCSampler.java:81)
        at vn.zalopay.benchmark.GRPCSampler.initGrpcInCurrentThread(GRPCSampler.java:203)
        at vn.zalopay.benchmark.GRPCSampler.initGrpcRequestSampler(GRPCSampler.java:133)
        at vn.zalopay.benchmark.GRPCSampler.sample(GRPCSampler.java:90)
        at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:651)
        at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:570)
        at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:501)
        at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:268)
        at java.lang.Thread.run(Thread.java:750)

I was able to run the gRPC sampler request from my local JMeter UI and command line successfully but I am facing issue while executing it in docker container

docker file:

FROM alpine/jmeter:5.6.3
COPY ./lib/jmeter-grpc-request.jar /opt/apache-jmeter-5.6.3/lib/ext/jmeter-grpc-request.jar
COPY ./lib/jmeter-plugins-manager-1.10.jar /opt/apache-jmeter-5.6.3/lib/ext/jmeter-plugins-manager-1.10.jar
RUN apk add protobuf

My proto file:

syntax = "proto3";

package com.grpc.spring;

option java_package = "com.grpc.spring.service";
option java_outer_classname = "Solutions";
option java_generic_services = true;

option java_multiple_files = true;

service SolutionService {
  rpc getSolution (SolutionRequest) returns (SolutionResponse) {};
}

message SolutionRequest {
  string name = 1;
}

message SolutionResponse {
  string message = 1;
}

Below is the protoc version from local/image:

local: libprotoc 28.3 Image: libprotoc 24.4

Will the difference in protoc version make any difference in the behaviour?

Note:

Both jmeter-plugins-manager-1.10.jar and jmeter-grpc-request.jar I pushed it from my local to the image.

Any help would be very much appreciated. Thanks in advance.

I was able to run the jmeter http sampler request script in Kubernetes, but when I try with the gRPC request, I get the below error:

2025-01-08 10:33:25,530 ERROR v.z.b.GRPCSampler: java.lang.RuntimeException: Unable to resolve service by invoking protoc: 
Unable to execute protoc binary
        at vn.zalopay.benchmark.core.ClientCaller.init(ClientCaller.java:88)
        at vn.zalopay.benchmark.core.ClientCaller.<init>(ClientCaller.java:53)
        at vn.zalopay.benchmark.GRPCSampler.initGrpcClient(GRPCSampler.java:81)
        at vn.zalopay.benchmark.GRPCSampler.initGrpcInCurrentThread(GRPCSampler.java:203)
        at vn.zalopay.benchmark.GRPCSampler.initGrpcRequestSampler(GRPCSampler.java:133)
        at vn.zalopay.benchmark.GRPCSampler.sample(GRPCSampler.java:90)
        at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:651)
        at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:570)
        at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:501)
        at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:268)
        at java.lang.Thread.run(Thread.java:750)

I was able to run the gRPC sampler request from my local JMeter UI and command line successfully but I am facing issue while executing it in docker container

docker file:

FROM alpine/jmeter:5.6.3
COPY ./lib/jmeter-grpc-request.jar /opt/apache-jmeter-5.6.3/lib/ext/jmeter-grpc-request.jar
COPY ./lib/jmeter-plugins-manager-1.10.jar /opt/apache-jmeter-5.6.3/lib/ext/jmeter-plugins-manager-1.10.jar
RUN apk add protobuf

My proto file:

syntax = "proto3";

package com.grpc.spring;

option java_package = "com.grpc.spring.service";
option java_outer_classname = "Solutions";
option java_generic_services = true;

option java_multiple_files = true;

service SolutionService {
  rpc getSolution (SolutionRequest) returns (SolutionResponse) {};
}

message SolutionRequest {
  string name = 1;
}

message SolutionResponse {
  string message = 1;
}

Below is the protoc version from local/image:

local: libprotoc 28.3 Image: libprotoc 24.4

Will the difference in protoc version make any difference in the behaviour?

Note:

Both jmeter-plugins-manager-1.10.jar and jmeter-grpc-request.jar I pushed it from my local to the image.

Any help would be very much appreciated. Thanks in advance.

• jmeter
• grpc
• jmeter-plugins
• protoc
• protobuf-java

Share Improve this question Follow edited Jan 8 at 11:53 Praveen Dhasarathan asked Jan 8 at 11:45 Praveen DhasarathanPraveen Dhasarathan 66822 gold badges1111 silver badges2525 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

Run arch command in both local and k8s pod and see what is the output. It might be the case you need to re-compile or cross-compile your proto files

Going forward consider taking a look into jmeter.log file for any suspicious entries and it would also be a good idea to enable JMeter debug logging at least for the components/plugins you're having problems with.

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