Java error when trying to run GRPC request - port number required

[Christian-Marc]

2023-06-07 22:48:55,261 ERROR v.z.b.GRPCSampler: java.lang.IllegalStateException
at com.google.common.base.Preconditions.checkState(Preconditions.java:495)
at com.google.common.net.HostAndPort.getPort(HostAndPort.java:110)
at vn.zalopay.benchmark.core.grpc.ChannelFactory.createChannelBuilder(ChannelFactory.java:51)
at vn.zalopay.benchmark.core.grpc.ChannelFactory.createChannel(ChannelFactory.java:39)
at vn.zalopay.benchmark.core.ClientCaller.createDynamicClient(ClientCaller.java:154)
at vn.zalopay.benchmark.core.ClientCaller.init(ClientCaller.java:96)
at vn.zalopay.benchmark.core.ClientCaller.(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:1623)

I think I found the issue: the port number is required, but the service don't have a port number. How can I use it without a port number