OverView console plugin not responding problem; ARERR [8760] Cannot establish a network connection to the AR System Plug-In server : localhost (9999)

If you face the below issue, while login to Mid-tier.

Encounter the following error when logging into Mid-tier:

"Cannot establish a network connection to the AR System Plug-In server : localhost (9999) : RPC: Miscellaneous tli error - System error (Connection refused) (ARERR 8760)"

ARS 7.6.04, Windows 2008 64 bit, LP: BMC Remedy AR System Server 7.6.04, DR: AR System Server 7.6.04, DM: FTS 7.6.04

at com.remedy.arsys.backchannel.TableEntryListBase.doQuery(Unknown Source)

at com.remedy.arsys.backchannel.TableEntryListBase.getAndEmitTable(Unknown Source)

at com.remedy.arsys.backchannel.GetTableEntryListAgent.process(Unknown Source)

at com.remedy.arsys.backchannel.NDXRequest.processRequest(Unknown Source)

at com.remedy.arsys.backchannel.NDXRequest.<init>(Unknown Source)

at com.remedy.arsys.backchannel.EntryListBase.<init>(Unknown Source)

at com.remedy.arsys.backchannel.TableEntryListBase.<init>(Unknown Source)

at com.remedy.arsys.backchannel.NDXGetTableEntryList.<init>(Unknown Source)

at com.remedy.arsys.backchannel.GetTableEntryListAgent.<init>(Unknown Source)

at com.remedy.arsys.backchannel.NDXFactory.handleRequest(Unknown Source)

Perform the below steps 

1. Confirm if IPv6 is enabled in the Windows 2008 server box by running "ping HOSTNAME" command in the command prompt window.
2. If you have IPv6 enabled on a host, you may encounter problems in AR connecting to Java plugin server or Java plugins connecting to AR server.
3. Run "netstat -nao|findstr 9999" command, which will help to see plugin port number "9999" is listening or not.
4. If above all conditions are met add the following entry to the java line in armonitor.cfg file.

          Note: Before make the changes in armonitor.cfg file, make sure you take the backup of it.

               -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false

     5. Restart AR Server again. 

• -Djava.net.preferIPv4Stack=true
  -Djava.net.preferIPv6Addresses=false
  For example, if the original entry is:
  “C:\Program Files (x86)\Java\jre6\bin\java.exe” -Xmx512m -classpath “D:\Program Files\BMC Software\ARSystem\pluginsvr; D:\Program Files\BMC Software\ARSystem\pluginsvr\arpluginsvr7604_build002.jar”
  The new entry should be:
  “C:\Program Files (x86)\Java\jre6\bin\java.exe" -Xmx512m -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false -classpath “D:\Program Files\BMC Software\ARSystem\pluginsvr; D:\Program Files\BMC Software\ARSystem\pluginsvr\arpluginsvr7604_build002.jar”