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This exception has no message.
java.lang.NullPointerException: 	at org.apache.catalina.loader.WebappClassLoader.findResources(WebappClassLoader.java:993)	at java.lang.ClassLoader.getResources(ClassLoader.java:1041)	at org.apache.commons.discovery.jdk.JDK12Hooks.getResources(JDK12Hooks.java:150)	at org.apache.commons.discovery.resource.DiscoverResources$1.getNextResources(DiscoverResources.java:153)	at org.apache.commons.discovery.resource.DiscoverResources$1.getNextResource(DiscoverResources.java:129)	at org.apache.commons.discovery.resource.DiscoverResources$1.hasNext(DiscoverResources.java:116)	at org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.getNextClassNames(DiscoverNamesInFile.java:186)	at org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.getNextClassName(DiscoverNamesInFile.java:170)	at org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.hasNext(DiscoverNamesInFile.java:157)	at org.apache.commons.discovery.resource.names.NameDiscoverers$1.getNextIterator(NameDiscoverers.java:143)	at org.apache.commons.discovery.resource.names.NameDiscoverers$1.hasNext(NameDiscoverers.java:126)	at org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$1.getNextResource(ResourceClassDiscoverImpl.java:159)	at org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$1.hasNext(ResourceClassDiscoverImpl.java:147)	at org.apache.axis.configuration.EngineConfigurationFactoryFinder$1.run(EngineConfigurationFactoryFinder.java:120)	at java.security.AccessController.doPrivileged(Native Method)	at org.apache.axis.configuration.EngineConfigurationFactoryFinder.newFactory(EngineConfigurationFactoryFinder.java:113)	at org.apache.axis.configuration.EngineConfigurationFactoryFinder.newFactory(EngineConfigurationFactoryFinder.java:160)	at org.apache.axis.client.Service.getEngineConfiguration(Service.java:813)	at org.apache.axis.client.Service.getAxisClient(Service.java:104)	at org.apache.axis.client.Service.(Service.java:113)	at com.atlassian.jira.rpc.soap.client.JiraSoapServiceServiceLocator.(JiraSoapServiceServiceLocator.java:12)	at com.atlassian.bamboo.jira.JiraSoapServiceFactory.newJiraSoapService(JiraSoapServiceFactory.java:26)	at com.atlassian.bamboo.jira.jiraissues.JiraRemoteIssueManagerImpl.getJiraSoapService(JiraRemoteIssueManagerImpl.java:185)	at com.atlassian.bamboo.jira.jiraissues.JiraRemoteIssueManagerImpl.refreshLoginToken(JiraRemoteIssueManagerImpl.java:157)	at com.atlassian.bamboo.jira.jiraissues.JiraRemoteIssueManagerImpl.getJiraIssueDetails(JiraRemoteIssueManagerImpl.java:97)	at com.atlassian.bamboo.jira.jiraissues.CachedJiraIssueDetails.getObject(CachedJiraIssueDetails.java:27)	at com.atlassian.bamboo.jira.jiraissues.JiraRemoteIssueManagerCache.getJiraIssueDetails(JiraRemoteIssueManagerCache.java:54)	at com.atlassian.bamboo.jira.jiraissues.JiraIssueManagerImpl$1.call(JiraIssueManagerImpl.java:53)	at com.atlassian.bamboo.jira.jiraissues.JiraIssueManagerImpl$1.call(JiraIssueManagerImpl.java:50)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)	at java.util.concurrent.FutureTask.run(FutureTask.java:138)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:619)