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嘗試編輯DSpace中具有1000個比特流的文件的元數據字段時遇到錯誤。DSpace，具有超過1000個比特流的錯誤編輯項目
我在帶有Ubuntu 14.04的機器上使用DSpace v5.1和Apache Tomcat 8.0.26。
我有一個存儲庫，每個項目（1到200）有不同數量的比特流，超過3000個項目。我已經成功地插入了一個包含1000個比特流的文檔，但是當我要通過JSPUI編輯元數據字段時，服務器會返回一條內部錯誤消息。首先，我認爲這是由於HTTP請求中參數過多所致，所以我將Tomcat的HTTP連接器配置參數的最大數量修改爲小於零（conf/server.xml中的maxParameterCount="-1"），所以它會沒有參數數量的限制。發生錯誤時，Tomcat的日誌沒有任何問題，所以我相信它與DSpace有關。
從錯誤在DSpace的（dspace.log.2016-11-25文件）日誌如下：
java.lang.NullPointerException
at org.dspace.handle.HandleManager.findHandle(HandleManager.java:404)
at org.dspace.app.webui.servlet.admin.EditItemServlet.doDSPost(EditItemServlet.java:207)
at org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:115)
at org.dspace.app.webui.servlet.DSpaceServlet.doPost(DSpaceServlet.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.dspace.app.webui.filter.RegisteredOnlyFilter.doFilter(RegisteredOnlyFilter.java:66)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
我如何能解決這個問題的任何想法？
非常感謝您的幫助