Confluence plugin development in WSL

Question

Hi, I am using Windows 10 and have WSL2 (Windows Subsystem for Linux) with Ubuntu 20.04. I have installed AdoptOpenJDK 8 $ java -version openjdk version "1.8.0_292" OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_292-b10) OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.292-b10, mixed mode) $ echo $JAVA_HOME /usr/lib/jvm/adoptopenjdk-8-hotspot-amd64 I have created a "hello-world" plugin as described here: https://developer.atlassian.com/server/framework/atlassian-sdk/create-a-confluence-hello-world-macro/ When I run `atlas-run` it starts but not accessible End of the log where I see some exeptions: [INFO] [talledLocalContainer] INFO: Deploying web application archive [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/confluence.war] [WARNING] [talledLocalContainer] log4j:WARN No such property [bufferedIO] in com.atlassian.confluence.logging.ConfluenceHomeLogAppender. [INFO] [talledLocalContainer] 2021-04-27 19:02:45,070 INFO [main] [com.atlassian.confluence.lifecycle] contextInitialized Starting Confluence 6.14.0 [build 7901 based on commit hash 9eed016aaa593220cd98620fec88bcbd9fd55893] - synchrony version 2.1.0-master-9d112c9d [INFO] [talledLocalContainer] 2021-04-27 19:04:00,681 ERROR [main] [ContainerBase.[Catalina].[localhost].[/confluence]] log Exception sending context initialized event to listener instance of class [com.atlassian.confluence.setup.ConfluenceConfigurationListener] [INFO] [talledLocalContainer] java.lang.ExceptionInInitializerError [INFO] [talledLocalContainer] at com.ibm.icu.text.Collator.(Collator.java:946) [INFO] [talledLocalContainer] at java.lang.Class.forName0(Native Method) [INFO] [talledLocalContainer] at java.lang.Class.forName(Class.java:264) [INFO] [talledLocalContainer] at org.h2.value.CompareMode.(CompareMode.java:57) [INFO] [talledLocalContainer] at org.h2.engine.SessionRemote.(SessionRemote.java:95) [INFO] [talledLocalContainer] at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:116) [INFO] [talledLocalContainer] at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:100) [INFO] [talledLocalContainer] at org.h2.Driver.connect(Driver.java:69) [INFO] [talledLocalContainer] at org.h2.server.TcpServer.initManagementDb(TcpServer.java:92) [INFO] [talledLocalContainer] at org.h2.server.TcpServer.start(TcpServer.java:238) [INFO] [talledLocalContainer] at org.h2.tools.Server.start(Server.java:484) [INFO] [talledLocalContainer] at com.atlassian.h2.ServerLifecycle.start(ServerLifecycle.java:83) [INFO] [talledLocalContainer] at com.atlassian.confluence.core.persistence.hibernate.ConfluenceHibernateConfig.getHibernateProperties(ConfluenceHibernateConfig.java:51) [INFO] [talledLocalContainer] at com.atlassian.confluence.setup.DefaultBootstrapManager.getHibernateProperties(DefaultBootstrapManager.java:660) [INFO] [talledLocalContainer] at com.atlassian.confluence.setup.DefaultBootstrapManager.performPersistenceUpgrade(DefaultBootstrapManager.java:343) [INFO] [talledLocalContainer] at com.atlassian.config.bootstrap.DefaultAtlassianBootstrapManager.init(DefaultAtlassianBootstrapManager.java:81) [INFO] [talledLocalContainer] at com.atlassian.confluence.setup.DefaultBootstrapManager.init(DefaultBootstrapManager.java:190) [INFO] [talledLocalContainer] at com.atlassian.config.util.BootstrapUtils.init(BootstrapUtils.java:36) [INFO] [talledLocalContainer] at com.atlassian.confluence.setup.ConfluenceConfigurationListener.initialiseBootstrapContext(ConfluenceConfigurationListener.java:133) [INFO] [talledLocalContainer] at com.atlassian.confluence.setup.ConfluenceConfigurationListener.contextInitialized(ConfluenceConfigurationListener.java:64) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4643) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5109) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:743) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:719) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:703) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:986) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1858) [INFO] [talledLocalContainer] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [INFO] [talledLocalContainer] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [INFO] [talledLocalContainer] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [INFO] [talledLocalContainer] at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:772) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:426) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1585) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:308) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:424) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:367) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:969) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [INFO] [talledLocalContainer] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [INFO] [talledLocalContainer] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [INFO] [talledLocalContainer] at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:261) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.startup.Catalina.start(Catalina.java:682) [INFO] [talledLocalContainer] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [INFO] [talledLocalContainer] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [INFO] [talledLocalContainer] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [INFO] [talledLocalContainer] at java.lang.reflect.Method.invoke(Method.java:498) [INFO] [talledLocalContainer] at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350) [INFO] [talledLocalContainer] at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492) [INFO] [talledLocalContainer] Caused by: java.lang.IllegalArgumentException: Invalid version number: Version number may be negative or greater than 255 [INFO] [talledLocalContainer] at com.ibm.icu.util.VersionInfo.getInstance(VersionInfo.java:191) [INFO] [talledLocalContainer] at com.ibm.icu.impl.ICUDebug.getInstanceLenient(ICUDebug.java:65) [INFO] [talledLocalContainer] at com.ibm.icu.impl.ICUDebug.(ICUDebug.java:69) [INFO] [talledLocalContainer] ... 61 more [INFO] [talledLocalContainer] 2021-04-27 19:04:01,261 INFO [main] [atlassian.confluence.plugin.PluginFrameworkContextListener] contextInitialized Initialising plugin system [INFO] [talledLocalContainer] 2021-04-27 19:04:01,262 FATAL [main] [atlassian.spring.container.SpringContainerContext] getComponent Spring Application context has not been set [INFO] [talledLocalContainer] 2021-04-27 19:04:01,262 ERROR [main] [atlassian.confluence.plugin.PluginFrameworkContextListener] contextInitialized Error initialising plugin manager: Spring Application context has not been set [INFO] [talledLocalContainer] java.lang.IllegalStateException: Spring Application context has not been set [INFO] [talledLocalContainer] at com.atlassian.spring.container.SpringContainerContext.getComponent(SpringContainerContext.java:48) [INFO] [talledLocalContainer] at com.atlassian.spring.container.ContainerManager.getComponent(ContainerManager.java:33) [INFO] [talledLocalContainer] at com.atlassian.confluence.plugin.PluginFrameworkContextListener.getPluginSystemLifecycle(PluginFrameworkContextListener.java:187) [INFO] [talledLocalContainer] at com.atlassian.confluence.plugin.PluginFrameworkContextListener.contextInitialized(PluginFrameworkContextListener.java:69) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4643) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5109) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:743) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:719) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:703) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:986) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1858) [INFO] [talledLocalContainer] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [INFO] [talledLocalContainer] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [INFO] [talledLocalContainer] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [INFO] [talledLocalContainer] at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:772) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:426) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1585) [INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:308) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:424) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:367) [INFO] [talledLocalContainer] Apr 27, 2021 7:04:01 PM org.apache.catalina.core.StandardContext startInternal [INFO] [talledLocalContainer] SEVERE: One or more listeners failed to start. Full details will be found in the appropriate container log file [INFO] [talledLocalContainer] Apr 27, 2021 7:04:01 PM org.apache.catalina.core.StandardContext startInternal [INFO] [talledLocalContainer] SEVERE: Context [/confluence] startup failed due to previous errors [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:969) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [INFO] [talledLocalContainer] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [INFO] [talledLocalContainer] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [INFO] [talledLocalContainer] at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:261) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770) [INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [INFO] [talledLocalContainer] at org.apache.catalina.startup.Catalina.start(Catalina.java:682) [INFO] [talledLocalContainer] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [INFO] [talledLocalContainer] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [INFO] [talledLocalContainer] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [INFO] [talledLocalContainer] at java.lang.reflect.Method.invoke(Method.java:498) [INFO] [talledLocalContainer] at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350) [INFO] [talledLocalContainer] at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492) [INFO] [talledLocalContainer] 2021-04-27 19:04:01,362 FATAL [main] [atlassian.spring.container.SpringContainerContext] getComponent Spring Application context has not been set [INFO] [talledLocalContainer] 2021-04-27 19:04:02,603 WARN [main] [atlassian.confluence.plugin.PluginFrameworkContextListener] contextDestroyed Failed to shut down plugin system during ServletContext shutdown: Spring Application context has not been set [INFO] [talledLocalContainer] 2021-04-27 19:04:02,712 INFO [main] [com.atlassian.confluence.lifecycle] contextDestroyed Stopping Confluence [INFO] [talledLocalContainer] 2021-04-27 19:04:03,055 ERROR [main] [com.atlassian.threadlocal.BruteForceThreadLocalCleanup] logErr Thread[main,5,main] created a ThreadLocal with key of type [org.springframework.core.NamedThreadLocal] (value [Prototype beans currently in creation]) and a value of type [null] (value [null]). This will be cleaned up [INFO] [talledLocalContainer] 2021-04-27 19:04:03,055 ERROR [main] [com.atlassian.threadlocal.BruteForceThreadLocalCleanup] logErr Thread[main,5,main] created a ThreadLocal with key of type [org.apache.log4j.helpers.ThreadLocalMap] (value [org.apache.log4j.helpers.ThreadLocalMap@4b79eecc]) and a value of type [null] (value [null]). This will be cleaned up [INFO] [talledLocalContainer] Apr 27, 2021 7:04:03 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc [WARNING] [talledLocalContainer] WARNING: The web application [confluence] registered the JDBC driver [org.h2.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. [INFO] [talledLocalContainer] Apr 27, 2021 7:04:03 PM org.apache.catalina.startup.HostConfig deployWAR [INFO] [talledLocalContainer] INFO: Deployment of web application archive [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/confluence.war] has finished in [225,457] ms [INFO] [talledLocalContainer] Apr 27, 2021 7:04:03 PM org.apache.catalina.startup.HostConfig deployWAR [INFO] [talledLocalContainer] INFO: Deploying web application archive [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/synchrony-proxy.war] [INFO] [talledLocalContainer] Apr 27, 2021 7:05:06 PM org.apache.jasper.servlet.TldScanner scanJars [INFO] [talledLocalContainer] 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. [INFO] [talledLocalContainer] Apr 27, 2021 7:05:13 PM org.apache.catalina.core.ApplicationContext log [INFO] [talledLocalContainer] INFO: 1 Spring WebApplicationInitializers detected on classpath [INFO] [talledLocalContainer] 19:05:18 [main] o.a.c.c.C.[.[.[/synchrony-proxy][INFO] log - Initializing Spring DispatcherServlet 'dispatcher' [INFO] [talledLocalContainer] Apr 27, 2021 7:05:18 PM org.apache.catalina.core.ApplicationContext log [INFO] [talledLocalContainer] INFO: Initializing Spring DispatcherServlet 'dispatcher' [INFO] [talledLocalContainer] Apr 27, 2021 7:05:50 PM org.apache.catalina.startup.HostConfig deployWAR [INFO] [talledLocalContainer] INFO: Deployment of web application archive [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/synchrony-proxy.war] has finished in [107,136] ms [INFO] [talledLocalContainer] Apr 27, 2021 7:05:50 PM org.apache.catalina.startup.HostConfig deployDirectory [INFO] [talledLocalContainer] INFO: Deploying web application directory [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/host-manager] [INFO] [talledLocalContainer] Apr 27, 2021 7:06:42 PM org.apache.jasper.servlet.TldScanner scanJars [INFO] [talledLocalContainer] 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. [INFO] [talledLocalContainer] Apr 27, 2021 7:06:42 PM org.apache.catalina.startup.HostConfig deployDirectory [INFO] [talledLocalContainer] INFO: Deployment of web application directory [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/host-manager] has finished in [51,969] ms [INFO] [talledLocalContainer] Apr 27, 2021 7:06:42 PM org.apache.catalina.startup.HostConfig deployDirectory [INFO] [talledLocalContainer] INFO: Deploying web application directory [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/manager] [INFO] [talledLocalContainer] Apr 27, 2021 7:07:35 PM org.apache.jasper.servlet.TldScanner scanJars [INFO] [talledLocalContainer] 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. [INFO] [talledLocalContainer] Apr 27, 2021 7:07:35 PM org.apache.catalina.startup.HostConfig deployDirectory [INFO] [talledLocalContainer] INFO: Deployment of web application directory [/c/Users/joaci/projects/confluence-test/mermaid-render-plugin/target/container/tomcat9x/cargo-confluence-home/webapps/manager] has finished in [53,289] ms [INFO] [talledLocalContainer] Apr 27, 2021 7:07:35 PM org.apache.coyote.AbstractProtocol start [INFO] [talledLocalContainer] INFO: Starting ProtocolHandler ["http-nio-1990"] [INFO] [talledLocalContainer] Apr 27, 2021 7:07:35 PM org.apache.coyote.AbstractProtocol start [INFO] [talledLocalContainer] INFO: Starting ProtocolHandler ["ajp-nio-8009"] [INFO] [talledLocalContainer] Apr 27, 2021 7:07:35 PM org.apache.catalina.startup.Catalina start [INFO] [talledLocalContainer] INFO: Server startup in 488782 ms [INFO] [talledLocalContainer] Tomcat 9.x started on port [1990] [INFO] confluence started successfully in 747s at http://localhost:1990/confluence [INFO] Type Ctrl-C to shutdown gracefully Any idea what's failing?

Joacim J · Answer

No success in asking here or in the other thread :(

Joacim J · Answer

Thanks @Daniel Eads but no success and I posted in this as you suggested https://community.developer.atlassian.com/t/issues-of-creating-a-confluence-plugin/47664

Daniel Eads · Answer

Hi @Joacim J ,

Sorry you've gone a few days without response! Community is largely answered by fellow Atlassian users, many of whom don't specifically do plugin development. Atlassian Staff also generally look for questions that have gone unanswered - and the replies with more information (which were helpful - thank you!) unfortunately made it less likely that Staff might see the thread while going through posts to respond to. I've moved the thread to the question post type as well (originally a discussion post type) as that's the type of content we are typically trying to help on.

We do have a dedicated Developer Community that might be good to check out for plugin development related questions. Since the topics are more focused, it's easier for other developers to watch the questions coming in and provide guidance. Fortunately - I did find a thread with a similar pattern that might be of help. Our own developer extraordinaire Melissa offers this advice from that thread:

Have you tried doing an atlas-clean on your confluence plugin directory before an atlas-run?
Particularly if the process wasn’t shut down using Ctrl-D it can cause some issues with the container and so cleaning and recreating it is your best bet.
I’ve just verified on a windows 10 machine, and I was able to start confluence and access it both at:

* localhost:1990/confluence; and
* machine-name:1990/confluence

I'm hopeful that Melissa's advice resolves the issue you see when trying to access your Confluence instance from the SDK. If you have more questions related to the SDK, I would also suggest posting in the Developer Community I linked to for a likelier chance of getting a response from another developer.

Cheers,
Daniel | Atlassian Community