[EMC 7.0.6.27] java stack problem

[Konrad_PL]

Hi Guys!

Today my NetSight (v 7.0.6.27) started showing an Error message with caption "Could not load report." each time when I am logging to the web service. Detailed message:

Message: Comparison method violates its general contract!
Java Class: java.lang.IllegalArgumentException
A server error has occurred.
Please check the server log for details.
java.lang.IllegalArgumentException at java.util.TimSort.mergeHi(TimSort.java:899) at java.util.TimSort.mergeAt(TimSort.java:516) at java.util.TimSort.mergeForceCollapse(TimSort.java:457) at java.util.TimSort.sort(TimSort.java:254) at java.util.Arrays.sort(Arrays.java:1512) at java.util.ArrayList.sort(ArrayList.java:1454) at java.util.Collections.sort(Collections.java:175) at com.enterasys.netsight.api.AppContext.getOperationLog(AppContext.java:996) at com.enterasys.netsight.console.server.webapps.monitor.devices.tables.DeviceDwr.getOperationLogTable(DeviceDwr.java:204) at sun.reflect.GeneratedMethodAccessor47782.invoke(:-1) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.directwebremoting.impl.CreatorModule$1.doFilter(CreatorModule.java:229) at com.enterasys.netsight.server.webapps.monitor.filters.DwrMethodFilter.doFilter(DwrMethodFilter.java:122) at org.directwebremoting.impl.CreatorModule$1.doFilter(CreatorModule.java:223) at org.directwebremoting.impl.CreatorModule.executeMethod(CreatorModule.java:241) at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:379) at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:332) at org.directwebremoting.dwrp.BaseCallHandler.handle(BaseCallHandler.java:104) at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:120) at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:141) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.enterasys.netsight.server.webapps.monitor.filters.CacheControlFilter.doFilter(CacheControlFilter.java:86) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.enterasys.netsight.server.webapps.monitor.filters.ImageExpiresHeaderFilter.doFilter(ImageExpiresHeaderFilter.java:75) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.enterasys.netsight.server.webapps.monitor.filters.CapabilitiesFilter.doFilter(CapabilitiesFilter.java:504) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.enterasys.netsight.server.webapps.monitor.filters.LicenseFilter.doFilter(LicenseFilter.java:292) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.enterasys.netsight.server.webapps.monitor.filters.UserConnectionFilter.doFilter(UserConnectionFilter.java:99) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:420) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) at java.lang.Thread.run(Thread.java:745)

It looks like a problem with Java stack. Maybe performance problem? I have not found anything related in server log. Any idea how to fix that or why it stats to showing without any reason?

[Doug]

Reference: https://gtacknowledge.extremenetworks.com/articles/Solution/Extreme-Management-displays-Could-not-lo...

[Konrad_PL]

This is not a solution but restarting the server caused the error message to disappear.
service nsserver restart