Unable to debug with CodeRunner

Server Code
1

Hello,

I’m trying to change an event handler for my app. I’ve followed the steps outlined here: Read Me First - Developing Backendless Server Code with Java
I am able to start CodeRunner with the following output:

milen@Milens-New-MBP HelpAPaw__JAVA_default_coding % ./bin/CodeRunner.sh
Path to “JAVA_HOME”: /Users/milen/Library/Java/JavaVirtualMachines/openjdk-14.0.2/Contents/Home

Running CodeRunner …
env JAVA_HOME=/Users/milen/Library/Java/JavaVirtualMachines/openjdk-14.0.2/Contents/Home /Users/milen/Library/Java/JavaVirtualMachines/openjdk-14.0.2/Contents/Home/bin/java -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -server -Xms384m -Xmx768m -Duser.timezone=UTC -Dfile.encoding=UTF-8 -Djava.net.preferIPv4Stack=true -Dlogback.configurationFile=logback.xml --add-modules java.se --add-exports java.base/jdk.internal.ref=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.nio=ALL-UNNAMED --add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.management/sun.management=ALL-UNNAMED --add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED -Dcom.sun.management.jmxremote.port=1097 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=backendless-dev.local -cp “:…/libs/” com.backendless.coderunner.CodeRunnerLoader

08:55:01.394 [INFO] c.b.c.CodeRunnerLoader |main| JDK from “JAVA_HOME” - /Users/milen/Library/Java/JavaVirtualMachines/openjdk-14.0.2/Contents/Home
08:55:01.406 [INFO] c.b.c.CommandLineProcessor |main| CodeRunner™ Backendless Debugging Utility
08:55:01.406 [INFO] c.b.c.CommandLineProcessor |main| Copyright(C) 2020 Backendless Corp. All rights reserved.
08:55:01.406 [INFO] c.b.c.CommandLineProcessor |main| Build date: 2020-08-21T10:54:23Z
Version: 6.0.10
Build id: 198337
VCS revision: 7c400b026c5a0c79cbb3a2b9b1d33fcac545a413
08:55:01.407 [INFO] c.b.c.CommandLineProcessor |main| CodeRunner session is running for 2 hours and will be terminated on 10:55:01.407435[UTC]

08:55:01.441 [INFO] c.b.h.HealthCheckHttpServer |main| Management port is absent, management server not started
08:55:01.442 [INFO] c.b.coderunner.LocalCodeRunner |main| Registering runner on: ‘https://api.backendless.com’
08:55:01.443 [INFO] c.b.coderunner.LocalCodeRunner |main| Application ID: ‘BDCD56B9-351A-E067-FFA4-9EA9CF2F4000’
08:55:01.443 [INFO] c.b.coderunner.LocalCodeRunner |main| Api key: ‘35577C95-0D09-F75B-FF06-2F92E51C9400’
08:55:04.134 [INFO] c.b.coderunner.LocalCodeRunner |main| Runner successfully registered
08:55:04.140 [INFO] c.b.c.parser.EventModelParser |main| Parsing event model…
08:55:04.172 [WARN] c.b.c.parser.EventModelParser |main| Timer’s ‘MoveOldSignals’ start time is in the past. The timer will run accordingly to the schedule.
08:55:04.510 [INFO] c.b.c.d.DebuggerConsoleInterface |main| Build successfully: 3 event handlers and 1 timer and 0 services
08:55:04.511 [INFO] c.b.c.d.DebuggerConsoleInterface |main| Deploying model to server, and starting debug…
08:55:04.932 [INFO] c.b.c.d.DebuggerConsoleInterface |main| Model successfully deployed.
08:55:04.932 [INFO] c.b.c.d.DebuggerConsoleInterface |main| Waiting for events…

This is the screenshot of my remote debugging configuration:

Screenshot 2020-09-05 at 12.00.38
Screenshot 2020-09-05 at 12.00.382150×1362 266 KB

However, when I try to run it I keep getting the following error:

Error running ‘CodeRunner’: Unable to open debugger port (localhost:5005): java.net.ConnectException “Connection refused (Connection refused)”

I’ve tried restarting IntelliJ Idea and the computer. I’ve checked if port 5005 is busy:

milen@Milens-New-MBP ~ % sudo lsof | grep localhost
Password:
idea 752 milen 194u IPv6 0x998c0bc9875bc931 0t0 TCP localhost:6942 (LISTEN)
idea 752 milen 450u IPv6 0x998c0bc9875bcf51 0t0 TCP localhost:63342 (LISTEN)
idea 752 milen 519u IPv6 0x998c0bc9875bb6d1 0t0 TCP localhost:49412 (LISTEN)
idea 752 milen 523u IPv6 0x998c0bc9875bedf1 0t0 TCP localhost:49412->localhost:49419 (ESTABLISHED)
java 820 milen 75u IPv6 0x998c0bc9875bdb91 0t0 TCP localhost:49419->localhost:49412 (ESTABLISHED)

I’ve also tried to change the port to a different number and still get the same error!

This line from the CodeRunner.sh execution is probably a hint to the problem:

08:55:01.441 [INFO] c.b.h.HealthCheckHttpServer |main| Management port is absent, management server not started
However, I have no idea what is causing it and how can I fix it.

Can you provide some assistance in solving this problem, please?

Best,
Milen

2

Hi, Milen.
Could you post here the entire CodeRunner.sh file.
Or check manually whether CODERUNNER_RUN_CMD contains $DEBUG_CR_ARGS. If no, just add it to get something like:
CODERUNNER_RUN_CMD="env JAVA_HOME=$JAVA_HOME $JAVA_EXEC $JAVA_ARGS $ADD_OPENS_ARGS $JMX_ARGS $DEBUG_CR_ARGS -cp \"*:../libs/*\" com.backendless.coderunner.CodeRunnerLoader"

3

Hi Oleg,

Here is the file:

#!/bin/bash

cd dirname "$0";

if [[ -z $JAVA_HOME ]]; then
JAVA_HOME=java -XshowSettings:properties -version 2>&1 | grep -E "java\.home" | awk '{print $3}';
fi

echo “Path to "JAVA_HOME": $JAVA_HOME”

JAVA_EXEC=“$JAVA_HOME/bin/java”

Minimal version to run CodeRunner

MINIMAL_VERSION=11

Check if Java is present and the minimal version requirement

java_version=$JAVA_EXEC --version | head -1 | awk '{print substr ($2, 1, 2);}'

if [ $java_version ];
then
if [ $java_version -lt $MINIMAL_VERSION ]; then
echo “Error: Java version is too low to run CodeRunner. At least Java ${MINIMAL_VERSION} needed.”;
fi

else
echo “Not able to find Java executable or version. Please check your Java installation.”;

exit 1;
fi

DEBUG_CR_ARGS=“-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005”

JMX_ARGS="
-Dcom.sun.management.jmxremote.port=1097
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname=backendless-dev.local"

JAVA_ARGS="
-XX:-OmitStackTraceInFastThrow
-XX:+HeapDumpOnOutOfMemoryError
-server
-Xms384m
-Xmx768m
-Duser.timezone=UTC
-Dfile.encoding=UTF-8
-Djava.net.preferIPv4Stack=true
-Dlogback.configurationFile=logback.xml
${JAVA_ARGS}"

ADD_OPENS_ARGS="
–add-modules java.se
–add-exports java.base/jdk.internal.ref=ALL-UNNAMED
–add-opens java.base/java.lang=ALL-UNNAMED
–add-opens java.base/java.nio=ALL-UNNAMED
–add-opens java.base/sun.nio.ch=ALL-UNNAMED
–add-opens java.management/sun.management=ALL-UNNAMED
–add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED"

CODERUNNER_RUN_CMD=“env JAVA_HOME=$JAVA_HOME $JAVA_EXEC $JAVA_ARGS $ADD_OPENS_ARGS $JMX_ARGS -cp ":…/libs/" com.backendless.coderunner.CodeRunnerLoader”

if [[ “$1” == “nohup” ]];
then
shift
CODERUNNER_RUN_CMD=“nohup ${CODERUNNER_RUN_CMD} $@ &”
else
CODERUNNER_RUN_CMD=“${CODERUNNER_RUN_CMD} $@”
fi

separator=“----------------------------------------”
echo -e “${separator}\nRunning CodeRunner …”
echo $CODERUNNER_RUN_CMD
echo -e “${separator}\n”
eval $CODERUNNER_RUN_CMD

From what I see DEBUG_CR_ARGS is only defined but not used.

4

Yes, this is the problem. I’ve added to the previous post how it should look like.
We will fixed it. Thanks!

5

Now it works. Thanks!