wasp probe is in red and not starting

Document ID : KB000110272
Last Modified Date : 10/08/2018
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Issue:
wasp probe is down and due to which the monitoring has been stopped.
Environment:
UIM: 8.5.1 
controller version on UMP robot: 7.80 
wasp : 8.51
Cause:
Could be because of java path inaccessibility and throwing following error.

Aug  9 08:59:39:991 [4696] Controller: Probe 'wasp' FAILED to start (command = ../../..//bin/java.exe -Dfile.encoding=UTF-8 -Xmx8192m -Xms2048m -XX:MaxPermSize=1024m -server -cp "lib/*;i18n" -Djava.util.logging.config.file=conf/logging.properties -Djava.security.auth.login.config=conf/NimJAAS.config -Djava.library.path=../../../lib -Djs.license.directory=conf com.nimsoft.nimbus.probe.service.wasp.Probe) error = (2) The system cannot find the file specified.
 
Aug  9 09:00:42:095 [1788] Controller: Probe 'wasp' FAILED to start (command = ../../..//bin/java.exe -Dfile.encoding=UTF-8 -Xmx8192m -Xms2048m -XX:MaxPermSize=1024m -server -cp "lib/*;i18n" -Djava.util.logging.config.file=conf/logging.properties -Djava.security.auth.login.config=conf/NimJAAS.config -Djava.library.path=../../../lib -Djs.license.directory=conf com.nimsoft.nimbus.probe.service.wasp.Probe) error = (2) The system cannot find the file specified.
 
Resolution:
1 Observed that following variables are missing in controller -> Environment tab.
NIM_JRE_HOME
NIM_JRE_HOME_1_8

Note: Either we can version 1_7 or 1_8 but not both.

2. Added these two variables in the Environment tab in the controller probe in UMP robot.

3. Restarted the robot.

4. Deleted wasp-engine folder from ~\Nimsoft\probes\service\wasp\work folder

5. Activated the wasp probe.

6. Clear the browser cache and verify the UMP

In case if still it is not working, please check with CA Support.