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    Thrown when an application is trying to use or access an object whose reference equals to null but if you are getting no message, try using the option -XX:-OmitStackTraceInFastThrow.

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java.lang.NullPointerException: charsetName at java.io.InputStreamReader.<init>(Unknown Source) at com.sun.mail.handlers.text_plain.getContent(text_plain.java:107) at javax.activation.DataSourceDataContentHandler.getContent(Unknown Source) at javax.activation.DataHandler.getContent(Unknown Source) at javax.mail.internet.MimeBodyPart.getContent(MimeBodyPart.java:637) at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.handleMultipart(AbstractMessageHandler.java:654) at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.createAttachmentsForMessage(AbstractMessageHandler.java:627) at com.atlassian.jira.plugins.mail.handlers.CreateIssueHandler.handleMessage(CreateIssueHandler.java:274) at com.atlassian.jira.plugins.mail.handlers.CreateOrCommentHandler.handleMessage(CreateOrCommentHandler.java:133) at com.atlassian.jira.service.services.mail.MailFetcherService$1.process(MailFetcherService.java:400) at com.atlassian.jira.service.services.mail.MailFetcherService$MessageProviderImpl.getAndProcessMail(MailFetcherService.java:293) at com.atlassian.jira.service.services.mail.MailFetcherService.runImpl(MailFetcherService.java:388) at com.atlassian.jira.service.services.file.AbstractMessageHandlingService.run(AbstractMessageHandlingService.java:257) at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:61) at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:48) at org.quartz.core.JobRunShell.run(JobRunShell.java:195) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)