I've searched through all available topics in the Atlassian community and couldn't find a resolution.
The error message is:
[INFO] [talledLocalContainer] com.atlassian.plugin.PluginParseException: Unable to scan for host components in plugin classes
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.factory.transform.stage.HostComponentSpringStage.execute(HostComponentSpringStage.java:62)
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.factory.transform.DefaultPluginTransformer.transform(DefaultPluginTransformer.java:146)
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.factory.OsgiPluginFactory.createOsgiPluginJar(OsgiPluginFactory.java:324)
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.factory.OsgiPluginFactory.create(OsgiPluginFactory.java:229)
[INFO] [talledLocalContainer] at com.atlassian.plugin.loaders.ScanningPluginLoader.deployPluginFromUnit(ScanningPluginLoader.java:155)
[INFO] [talledLocalContainer] at com.atlassian.plugin.loaders.ScanningPluginLoader.loadAllPlugins(ScanningPluginLoader.java:89)
[INFO] [talledLocalContainer] at com.atlassian.plugin.loaders.PermissionCheckingPluginLoader.loadAllPlugins(PermissionCheckingPluginLoader.java:24)
[INFO] [talledLocalContainer] at com.atlassian.plugin.manager.DefaultPluginManager.earlyStartup(DefaultPluginManager.java:471)
[INFO] [talledLocalContainer] at com.atlassian.plugin.manager.DefaultPluginManager.init(DefaultPluginManager.java:446)
[INFO] [talledLocalContainer] at com.atlassian.bamboo.container.BambooContainer.init(BambooContainer.java:206)
[INFO] [talledLocalContainer] at com.atlassian.bamboo.container.BambooContainer.initialise(BambooContainer.java:187)
[INFO] [talledLocalContainer] at com.atlassian.bamboo.upgrade.UpgradeLauncher.initialiseBambooContainer(UpgradeLauncher.java:185)
[INFO] [talledLocalContainer] at com.atlassian.bamboo.upgrade.UpgradeLauncher.upgradeAndStartBamboo(UpgradeLauncher.java:95)
[INFO] [talledLocalContainer] at com.atlassian.bamboo.upgrade.UpgradeLauncher.contextInitialized(UpgradeLauncher.java:40)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
[INFO] [talledLocalContainer] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)
[INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1073)
[INFO] [talledLocalContainer] at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
[INFO] [talledLocalContainer] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[INFO] [talledLocalContainer] at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[INFO] [talledLocalContainer] at java.lang.Thread.run(Thread.java:748)
[INFO] [talledLocalContainer] Caused by: java.io.IOException: Error parsing class file
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.util.ClassBinaryScanner.scanClassBinary(ClassBinaryScanner.java:66)
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.factory.transform.stage.HostComponentSpringStage.findUsedHostComponents(HostComponentSpringStage.java:194)
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.factory.transform.stage.HostComponentSpringStage.execute(HostComponentSpringStage.java:58)
[INFO] [talledLocalContainer] ... 26 more
[INFO] [talledLocalContainer] Caused by: java.lang.ArrayIndexOutOfBoundsException: 18
[INFO] [talledLocalContainer] at aQute.lib.osgi.Clazz.parseClassFile(Clazz.java:448)
[INFO] [talledLocalContainer] at aQute.lib.osgi.Clazz.parseClassFile(Clazz.java:369)
[INFO] [talledLocalContainer] at aQute.lib.osgi.Clazz.parseClassFileWithCollector(Clazz.java:359)
[INFO] [talledLocalContainer] at com.atlassian.plugin.osgi.util.ClassBinaryScanner.scanClassBinary(ClassBinaryScanner.java:38)
[INFO] [talledLocalContainer] ... 28 more
Could anyone help in identifying what is the cause of this?