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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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via Sakai JIRA by Andrea Schweer, 1 year ago
This exception has no message.
via Sakai JIRA by Andrea Schweer, 2 years ago
This exception has no message.
via Google Groups by Gudjon I. Gudjonsson, 1 month ago
via Oracle Community by 773012, 1 year ago
via Oracle Community by 988337, 1 year ago
via JFrog JIRA by Alexander Fisher, 1 year ago
java.lang.NullPointerException: 	at java.util.Hashtable.put(Hashtable.java:514)	at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartParser.readHeaders(DSpaceMultipartParser.java:391)	at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartParser.parsePart(DSpaceMultipartParser.java:190)	at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartParser.parseMultiPart(DSpaceMultipartParser.java:170)	at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartParser.parseParts(DSpaceMultipartParser.java:102)	at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartParser.getParts(DSpaceMultipartParser.java:143)	at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceRequestFactory.getServletRequest(DSpaceRequestFactory.java:83)	at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartFilter.doFilter(DSpaceMultipartFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	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:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769)	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698)	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891)	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)	at java.lang.Thread.run(Thread.java:745)