How to fix “No remote command visitor” error getting while Dumping data on request in tcpclient mode

[Vijay Nanekar]

Hello,

We have started our micro service with jacoco java agent with tcpclient output mode, -javaagent:$PWD/coverage/jacocoagent.jar=output=tcpclient,includes=*,address=100.XXX.XXX.XXX,port=6300

Micro-service get started successfully.

Next, On another machine (100.XXX.XXX.XXX), we have executed ExecutionDataServer.java given on jacoco site (https://www.jacoco.org/jacoco/trunk/doc/examples/java/ExecutionDataServer.java) This will continuously listen for an incoming connection on port 6300.

Now, we have executed test cases.

After that, We connect to micro-service machine to dump coverage data on the fly (Without shutdown). To do that we execute below jacoco command on micro service machine. java -jar coverage/jacococli.jar dump --address 100.XXX.XXX.XXX –destfile jacoco-server.exec

Once I executed the above command, connection successfully gets created between 100.XXX.XXX.XXX machine and micro service machine. But data is not getting dumped on 100.XXX.XXX.XXX machine. We are getting "No remote command visitor" error.

Stack Trace : Exception in thread "main" java.io.IOException: No remote command visitor. at org.jacoco.cli.internal.core.runtime.RemoteControlReader.readDumpCommand(RemoteControlReader.java:63) at org.jacoco.cli.internal.core.runtime.RemoteControlReader.readBlock(RemoteControlReader.java:42) at org.jacoco.cli.internal.core.data.ExecutionDataReader.read(ExecutionDataReader.java:92) at org.jacoco.cli.internal.core.tools.ExecDumpClient.dump(ExecDumpClient.java:127) at org.jacoco.cli.internal.core.tools.ExecDumpClient.dump(ExecDumpClient.java:98) at org.jacoco.cli.internal.commands.Dump.execute(Dump.java:69) at org.jacoco.cli.internal.Main.execute(Main.java:89) at org.jacoco.cli.internal.Main.main(Main.java:104)

Please help me to resolve this issue.

Thanks,

Vijay

ᐧ

[Evgeny Mandrikov]

On Tuesday, April 2, 2019 at 6:29:24 PM UTC+2, Vijay Nanekar wrote:

We have started our micro service with jacoco java agent with tcpclient output mode, -javaagent:$PWD/coverage/jacocoagent.jar=output=tcpclient,includes=*,address=100.XXX.XXX.XXX,port=6300

...

After that, We connect to micro-service machine to dump coverage data on the fly (Without shutdown). To do that we execute below jacoco command on micro service machine. java -jar coverage/jacococli.jar dump --address 100.XXX.XXX.XXX –destfile jacoco-server.exec

"dump" from command line interface is not applicable here - quoting its description ( https://www.jacoco.org/jacoco/trunk/doc/cli.html ):

Request execution data from a JaCoCo agent running in 'tcpserver' output mode.

In case of output=tcpclient ExecutionDataServer can request dump from its client - see https://groups.google.com/d/msg/jacoco/V7Bmz5r0P24/PdCC5apIoqgJ

[Vijay Nanekar]

Thanks a lot Evgeny. 

Yes, I got it now that cli dump is only for agent running in 'tcpserver' output mode. 

In our case, we are using output=tcpclient, And as per post link you provided, we have to call RemoteControlWriter.visitDumpCommand(true, false).

Do we need to place this call in ExecutionDataServer.java class? or Do I need to execute this from micro service container?

[Evgeny Mandrikov]

On Tuesday, April 9, 2019 at 6:50:29 AM UTC+2, Vijay Nanekar wrote:

Do we need to place this call in ExecutionDataServer.java class?

Yes 

[Vijay Nanekar]

Thanks a lot Evgeny. It is working for me now.

[abat...@indeed.com]

Hello,
Could you elaborate more on how this worked, please?
If there are updates required to ExecutionDataServer.java, is this file updated? I am still getting the same error "No remote command visitor".

[Vijay Nanekar]

Hello Abatarseh,

Yes you need to update ExecutionDataServer.java. And add below API call to send dump command.

RemoteControlWriter.visitDumpCommand(true, false) 

Thanks,

Vijay

--
You received this message because you are subscribed to the Google Groups "JaCoCo and EclEmma Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to jacoco+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/jacoco/6305ee4d-6068-4834-a9d5-2212d2d7a2bd%40googlegroups.com.