Resolution:
The error below can appear in the Admin GUI web page when trying to access the Discriminator Admin page. It is likely to be due to invalid parameters. For example, a String with double quotes. To resolve this error, check the discriminator insertion query that appears in the internal.script DB. Check the following directory to locate it: datasynapse\webapps\livecluster\WEB-INF\db\internal.

Error text

Page Requested: /livecluster/admin/control/job/jobDescDiscrimination.jsp An unexpected Manager error has occurred. please go back and try again.
java.lang.IllegalArgumentException: com.datasynapse.commons.serialization.xml.XmlException at
com.livecluster.util.db.DBUtils.xmlDeserialize(DBUtils.java:422) at
com.livecluster.gridserver.repository.db.DiscriminatorTable$Discriminato rTableData.(DiscriminatorTable.java:53) at
com.livecluster.gridserver.repository.db.DiscriminatorTable.getData(Disc riminatorTable.java:35) at
com.livecluster.gridserver.repository.db.RepositoryTable.fillCache(Repos itoryTable.java:64) at
com.livecluster.util.sql.Table.retrieveData(Table.java:233) at
com.livecluster.gridserver.repository.db.RepositoryDBImpl.retrieveData(R epositoryDBImpl.java:65) at
com.livecluster.gridserver.repository.db.DiscriminatorRepositoryDBImpl.r etrieveDiscriminators(DiscriminatorRepositoryDBImpl.java:58) at
com.livecluster.admin.handler.DiscriminatorAdminHandler.DDKeyIterator(Di scriminatorAdminHandler.java:186) at
com.livecluster.admin.handler.DiscriminatorAdminHandler.getItems(Discrim inatorAdminHandler.java:94) at
com.livecluster.admin.handler.AbstractPropertiesHandler.service(Abstract PropertiesHandler.java:66) at
com.livecluster.admin.handler.AbstractApplicationHandler.serviceRequest( AbstractApplicationHandler.java:58) at
com.livecluster.admin.servlet.AdminControllerServlet.process(AdminContro llerServlet.java:470) at
com.livecluster.admin.servlet.AdminControllerServlet.doGet(AdminControll erServlet.java:210) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:115) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:92) at
com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChai n.java:106) at
com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.ja va:178) at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.j ava:229) at
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:259) at com.caucho.server.port.TcpConnection.run(TcpConnection.java:386) at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:490) at
com.caucho.util.ThreadPool.run(ThreadPool.java:423) at
java.lang.Thread.run(Thread.java:595)

Discriminator page error