XMLStreamException:尝试输出第二个根,StaXparser

Question

writer.writeStartElement(startElement.getName().getLocalPart());

//当我在具有一个线程的独立计算机上运行时,它工作正常,但是当我在服务器上运行多个线程的多个作业时,它会给我以下错误:

writer.writeStartElement(startElement.getName().getLocalPart());

javax.xml.stream.XMLStreamException: Trying to output second root, <element>

ERROR [STDERR] (JBossQuartzScheduler_Worker-4) javax.xml.stream.XMLStreamException:
 Trying to output second root, <handset>
ERROR [STDERR] (JBossQuartzScheduler_Worker-4)  at com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1473)
ERROR [STDERR] (JBossQuartzScheduler_Worker-4)  at com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1480)
ERROR [STDERR] (JBossQuartzScheduler_Worker-4)  at com.ctc.wstx.sw.BaseStreamWriter.reportNwfStructure(BaseStreamWriter.java:1508)
ERROR [STDERR] (JBossQuartzScheduler_Worker-4)  at com.ctc.wstx.sw.BaseNsStreamWriter.checkStartElement(BaseNsStreamWriter.java:444)
ERROR [STDERR] (JBossQuartzScheduler_Worker-4)  at com.ctc.wstx.sw.BaseNsStreamWriter.writeStartElement(BaseNsStreamWriter.java:292)