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java.lang.NullPointerException: 	at java.util.LinkedList.addBefore(Unknown Source)	at java.util.LinkedList.addFirst(Unknown Source)	at org.ofbiz.core.util.UtilCache.put(UtilCache.java:196)	at com.atlassian.jira.issue.cache.IssueCache.addIssueCacheValueToCache(IssueCache.java:179)	at com.atlassian.jira.issue.cache.IssueCache.getIssue(IssueCache.java:134)	at com.atlassian.jira.issue.cache.IssueCache.getIssue(IssueCache.java:112)	at com.atlassian.jira.issue.cache.DefaultCacheManager.getValueByAttribute(DefaultCacheManager.java:66)	at com.atlassian.jira.issue.managers.CachingIssueManager.getIssue(CachingIssueManager.java:42)	at sun.reflect.GeneratedMethodAccessor113.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at com.atlassian.util.profiling.object.ObjectProfiler.profiledInvoke(ObjectProfiler.java:71)	at com.atlassian.jira.config.component.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:27)	at $Proxy2.getIssue(Unknown Source)	at com.atlassian.jira.servlet.QuickLinkServlet.service(QuickLinkServlet.java:46)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)	at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)	at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)	at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:168)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)