Problem

In some situation, you might experience errors when trying to export or import the Server Configuration. The export doesn't complete neither from the Admin UI nor from the command line of the server.

Symptoms

When using the system_export script in the server's terminal, the following message will be thrown:

java.lang.NullPointerException
at com.tumbleweed.st.util.SystemConfigExportImporRunUtil.isRunning(SystemConfigExportImporRunUtil.java:101)
at com.tumbleweed.st.util.SystemConfigExportImporRunUtil.isExportRunning(SystemConfigExportImporRunUtil.java:43)
at com.tumbleweed.st.server.exportimport.SystemConfigExportUtil.systemConfigExport(SystemConfigExportUtil.java:132)
at com.tumbleweed.st.server.exportimport.SystemConfigCommandlineUtil.main(SystemConfigCommandlineUtil.java:358)

When attempting the export from the Admin UI you won't be able to load the Operations -> Server Configuration -> Import/Export Server Configuration page, and you will be greeted by an Internal Server Error. The following message will be observed on the Server Log page:

Unexpected exception caught by error page.

With Stack Trace:

java.lang.NullPointerException
at com.tumbleweed.st.util.SystemConfigExportImporRunUtil.isRunning(SystemConfigExportImporRunUtil.java:101)
at com.tumbleweed.st.util.SystemConfigExportImporRunUtil.isExportRunning(SystemConfigExportImporRunUtil.java:43)
at com.tumbleweed.st.server.admin.configuration.ServerImportExportContext.doGet(ServerImportExportContext.java:76)
at com.tumbleweed.tda.tags.control.ContextHandler.handleAction(ContextHandler.java:88)
at com.tumbleweed.tda.tags.control.ContextHandlerTag.doEndTag(ContextHandlerTag.java:96)
at org.apache.jsp.configuration.serverImportExport_jspx._jspx_meth_control_005fcontext_005f0(serverImportExport_jspx.java:649)
at org.apache.jsp.configuration.serverImportExport_jspx._jspService(serverImportExport_jspx.java:108)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

Resolution

One possible cause for these errors might be a leftover file in the $FILEDRIVEHOME/var/tmp folder. If it exists, remove it and then attempt the configuration export again.