java.lang.NoClassDefFoundError: Could not initialize class proto.SigningProto

[Bhala1987]

I am getting the following error, please let me know what may be wrong:

2020-05-27 18:06:21,909 INFO j.g.c.GrpcClientSampler: Created GrpcClientSampler 2020-05-27 18:06:21,910 INFO o.a.j.e.StandardJMeterEngine: Running the test! 2020-05-27 18:06:21,910 INFO o.a.j.s.SampleEvent: List of sample_variables: [] 2020-05-27 18:06:21,912 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Downloads\apache-jmeter-5.2.1\lib\ext\bcprov-jdk15on-1.60.jar to classpath 2020-05-27 18:06:21,912 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Downloads\apache-jmeter-5.2.1\lib\ext\grpc-api-1.29.0.jar to classpath 2020-05-27 18:06:21,912 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Downloads\apache-jmeter-5.2.1\lib\ext\grpc-netty-1.29.0.jar to classpath 2020-05-27 18:06:21,912 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Downloads\apache-jmeter-5.2.1\lib\ext\grpc-netty-shaded-1.29.0.jar to classpath 2020-05-27 18:06:21,912 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Downloads\apache-jmeter-5.2.1\lib\ext\grpc-okhttp-1.29.0.jar to classpath 2020-05-27 18:06:21,913 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Downloads\apache-jmeter-5.2.1\lib\ext\jmeter-grpc-plugin.jar to classpath 2020-05-27 18:06:21,913 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Downloads\apache-jmeter-5.2.1\lib\ext\lombok-1.18.10.jar to classpath 2020-05-27 18:06:21,913 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Documents\Bhala\EHRData\bitbucket\jmeter\src\main\resources\config.properties to classpath 2020-05-27 18:06:21,913 INFO o.a.j.t.TestPlan: added C:\Users\b.rajalakshmi\Documents\Bhala\EHRData\bitbucket\jmeter\src\main\resources\jmeter\grpc\utils\GrpcClientSamplerResources.properties to classpath 2020-05-27 18:06:21,913 INFO o.a.j.g.u.JMeterMenuBar: setRunning(true, local) 2020-05-27 18:06:22,040 INFO o.a.j.e.StandardJMeterEngine: Starting ThreadGroup: 1 : Thread Group 2020-05-27 18:06:22,040 INFO o.a.j.e.StandardJMeterEngine: Starting 1 threads for group Thread Group. 2020-05-27 18:06:22,040 INFO o.a.j.e.StandardJMeterEngine: Thread will continue on error 2020-05-27 18:06:22,040 INFO o.a.j.t.ThreadGroup: Starting thread group... number=1 threads=1 ramp-up=1 delayedStart=false 2020-05-27 18:06:22,040 INFO j.g.c.GrpcClientSampler: Created GrpcClientSampler 2020-05-27 18:06:22,041 INFO o.a.j.t.ThreadGroup: Started thread group number 1 2020-05-27 18:06:22,041 INFO o.a.j.e.StandardJMeterEngine: All thread groups have been started 2020-05-27 18:06:22,042 INFO o.a.j.t.JMeterThread: Thread started: Thread Group 1-1 2020-05-27 18:06:22,213 INFO o.a.j.t.JMeterThread: Thread finished: Thread Group 1-1 2020-05-27 18:06:22,213 ERROR o.a.j.JMeter: Uncaught exception in thread Thread[Thread Group 1-1,6,main] java.lang.NoClassDefFoundError: Could not initialize class proto.SigningProto at proto.GetPublicKeyRequest.internalGetFieldAccessorTable(GetPublicKeyRequest.java:212) ~[jmeter-grpc-plugin.jar:?] at com.google.protobuf.GeneratedMessageV3.getDescriptorForType(GeneratedMessageV3.java:133) ~[jmeter-grpc-plugin.jar:?] at com.google.protobuf.TextFormat$Printer.print(TextFormat.java:344) ~[jmeter-grpc-plugin.jar:?] at com.google.protobuf.TextFormat$Printer.print(TextFormat.java:334) ~[jmeter-grpc-plugin.jar:?] at com.google.protobuf.TextFormat$Printer.printToString(TextFormat.java:519) ~[jmeter-grpc-plugin.jar:?] at com.google.protobuf.AbstractMessage.toString(AbstractMessage.java:111) ~[jmeter-grpc-plugin.jar:?] at jmeter.grpc.client.ClientRecorder.(ClientRecorder.java:14) ~[jmeter-grpc-plugin.jar:?] at jmeter.grpc.client.GrpcClientSampler.sample(GrpcClientSampler.java:88) ~[jmeter-grpc-plugin.jar:?] at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:627) ~[ApacheJMeter_core.jar:5.2.1] at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:551) ~[ApacheJMeter_core.jar:5.2.1] at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:490) ~[ApacheJMeter_core.jar:5.2.1] at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:257) ~[ApacheJMeter_core.jar:5.2.1] at java.lang.Thread.run(Unknown Source) [?:1.8.0_241] 2020-05-27 18:06:22,214 INFO o.a.j.e.StandardJMeterEngine: Notifying test listeners of end of test 2020-05-27 18:06:22,215 INFO o.a.j.g.u.JMeterMenuBar: setRunning(false, local)

please find attached the screenshot of jmeter and the JAR file used for reference. jmeter-grpc-plugin.zip

[thoainguyen]

Hi @Bhala1987, Might you forget type import proto.SigninProto; line in requestBuilderCode ? Please attach the jmx file for detailed

[Bhala1987]

Thanks a lot @thoainguyen for getting back to me, I fixed it by adding the missing proto class for descriptor in the request :)