Plugin SDK unable to start Confluence 8.5.0-rc2

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1

I can launch Confluence with Plugin SDK when I don’t specify a version. The Confluence version is shown to be version 7.

I wanted to experiment with custom emoji, which seems to be in version 8 only. So I cleared cache and chagned the command to add --version parameter:
Executing: "C:\Applications\Atlassian\atlassian-plugin-sdk-8.2.7\apache-maven-3.5.4\bin\mvn.cmd" com.atlassian.maven.plugins:amps-dispatcher-maven-plugin:8.1.2:run -gs C:\Applications\Atlassian\atlassian-plugin-sdk-8.2.7\apache-maven-3.5.4/conf/settings.xml -Dhttp.port=2990 -Dajp.port=8009 -Dproduct=confluence -Djvmargs=-Datlassian.mail.senddisabled=false -Djvmargs=-Xmx6G -Dproduct.version=8.5.0-rc2

Version 8 gets downloaded and launched:

[INFO] [talledLocalContainer] Tomcat 9.x started on port [2990]
[INFO] confluence started successfully in 65s at http://localhost:2990/confluence
[INFO] Type Ctrl-C to shutdown gracefully

But when I hit the URL, it shows me a blank page.

The log file has nothing in it:

Aug 31, 2023 9:22:20 AM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Aug 31, 2023 9:22:20 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory [C:\KC\git\PCCW_Confluence\ConfluencePlugin\target\container\tomcat9x\cargo-confluence-home\webapps\manager] has finished in [1,627] ms
Aug 31, 2023 9:22:20 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-nio-2990"]
Aug 31, 2023 9:22:20 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in [19956] milliseconds

Why does it not work?

2

Hello @KCWong,

How are you starting the server?

This works for me. I am using linux but I suspect the way you pass the version in is wrong.
It is not a JVM argument it is a script argument as the documentation describes it.
The argument is also version not --product.version–

atlas-run \
 --product confluence \
 --context-path ROOT \
 --version 8.5.0-rc2 \
 --jvmargs "-Datlassian.mail.senddisabled=true  -XX:+ExplicitGCInvokesConcurrent"

NOTE: I have not tried starting this version of Confluence but I have used the above command to start Jira, Confluence and Bitbucket versions of interest to me.