java.lang.NumberFormatException: For input string: ""
   at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
   at java.lang.Long.parseLong(Long.java:431)
   at java.lang.Long.parseLong(Long.java:468)
   at org.netbeans.modules.jira.issue.NbJiraIssue.getLastModify(NbJiraIssue.java:357)
   at org.netbeans.modules.jira.repository.JiraRepository$IssueAccessorImpl.getLastModified(JiraRepository.java:717)
   at org.netbeans.modules.bugtracking.ui.issue.cache.IssueCache.setIssueData(IssueCache.java:284)
   at org.netbeans.modules.bugtracking.ui.issue.cache.IssueCache.setIssueData(IssueCache.java:222)
   at org.netbeans.modules.jira.query.JiraQuery$IssuesCollector.accept(JiraQuery.java:310)
   at org.eclipse.mylyn.internal.jira.core.JiraRepositoryConnector$QueryHitCollector.collectIssue(JiraRepositoryConnector.java:583)
   at org.eclipse.mylyn.internal.jira.core.service.web.rss.JiraRssHandler.endElement(JiraRssHandler.java:650)
   at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1774)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2930)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
   at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
   at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
   at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
   at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
   at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
   at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
   at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
   at org.eclipse.mylyn.internal.jira.core.service.web.rss.JiraRssReader.readRssFeed(JiraRssReader.java:49)
   at org.eclipse.mylyn.internal.jira.core.service.web.rss.JiraRssSessionCallback.parseResult(JiraRssSessionCallback.java:116)
   at org.eclipse.mylyn.internal.jira.core.service.web.rss.JiraRssSessionCallback.run(JiraRssSessionCallback.java:97)
   at org.eclipse.mylyn.internal.jira.core.service.web.JiraWebSession.doInSession(JiraWebSession.java:123)
   at org.eclipse.mylyn.internal.jira.core.service.web.rss.JiraRssClient.doInSession(JiraRssClient.java:45)
   at org.eclipse.mylyn.internal.jira.core.service.web.rss.JiraRssClient.findIssues(JiraRssClient.java:75)
   at org.eclipse.mylyn.internal.jira.core.service.JiraClient.findIssues(JiraClient.java:228)
   at org.eclipse.mylyn.internal.jira.core.service.JiraClient.search(JiraClient.java:470)
   at org.eclipse.mylyn.internal.jira.core.JiraRepositoryConnector.performQuery(JiraRepositoryConnector.java:135)
   at org.netbeans.modules.jira.commands.PerformQueryCommand.execute(PerformQueryCommand.java:76)
   at org.netbeans.modules.jira.commands.JiraExecutor.execute(JiraExecutor.java:109)
   at org.netbeans.modules.jira.commands.JiraExecutor.execute(JiraExecutor.java:90)
   at org.netbeans.modules.jira.query.JiraQuery$1.run(JiraQuery.java:179)
   at org.netbeans.modules.bugtracking.spi.Query.executeQuery(Query.java:261)
   at org.netbeans.modules.jira.query.JiraQuery.refreshIntern(JiraQuery.java:155)
   at org.netbeans.modules.jira.query.JiraQuery.refresh(JiraQuery.java:217)
   at org.netbeans.modules.jira.query.QueryController$QueryTask.executeQuery(QueryController.java:1260)
   at org.netbeans.modules.jira.query.QueryController$QueryTask.run(QueryController.java:1276)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1417)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1955)