"jacococli.jar dump", Connection refused

[Vasu BK]

Hello experts,

First of all would like to wish you all a wonderful year ahead.

Now, here is an issue I am facing and need your help.

I am trying to implement a Java code coverage solution for my project using jacoco. The projects gets build in gradle environment. I wanted to have capability to collect/dump coverage data on-demand. For that, I am trying to use jacoco CLI (ref: https://www.jacoco.org/jacoco/trunk/doc/cli.html). So, I have configured my jacocoagent with below options.

output = "tcpserver"                

address = "*" 

port = 6300

But, when I run "jacococli.jar dump" command, I get below error. My dev environment is Linux. I tried with output = tcpclient  as well. The issue remains same. Any insights would be highly appreciated.

$ java -jar /da/ToolsAndLibs/NoArch/jacoco-0.8.7/lib/jacococli.jar dump --destfile /da/data/coverage/coverage_demanddump_dva.exec 

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

[WARN] Connection refused (Connection refused).

[INFO] Connecting to localhost/127.0.0.1:6300.

Exception in thread "main" java.net.ConnectException: Connection refused (Connection refused)

   at java.net.PlainSocketImpl.socketConnect(Native Method)

   at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)

   at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

   at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

   at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

   at java.net.Socket.connect(Socket.java:607)

   at java.net.Socket.connect(Socket.java:556)

   at java.net.Socket.<init>(Socket.java:452)

   at java.net.Socket.<init>(Socket.java:262)

   at org.jacoco.cli.internal.core.tools.ExecDumpClient.tryConnect(ExecDumpClient.java:144)

   at org.jacoco.cli.internal.core.tools.ExecDumpClient.dump(ExecDumpClient.java:116)

   at org.jacoco.cli.internal.core.tools.ExecDumpClient.dump(ExecDumpClient.java:99)

   at org.jacoco.cli.internal.commands.Dump.execute(Dump.java:70)

   at org.jacoco.cli.internal.Main.execute(Main.java:90)

   at org.jacoco.cli.internal.Main.main(Main.java:105)

Thank you in advance for your help.

Regards,

Vasu

[Marc Hoffmann]

Hi Vasu,

I assume your test program is running on the same machine where you execute the cli command, right?

As a first step I would double-check whether the tcp server is actually running.  the When you execute

   netstat -an

on your system, can you see an entry like this?

tcp4       0      0  127.0.0.1.6300        *.*                    LISTEN

Regards,

-marc

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