If you get a java.lang.NullPointerException while trying to check Java system reports through NetWeaver Administrator (NWA), check if the applications required are running or not.
1. Go to http://<server>:<port>/nwa --> Operation management --> Systems --> Start&Stop --> Java EE Applications
2. Restart/start the following applications
tc~lm~webadmin~performance~provider_ear
tc~lm~webadmin~performance~viewer~wd
tc~lm~webadmin~monitor~state~wd
tc~lm~webadmin~monitor~complib~wd
3. Check SAP notes 1261071 and 1349854 if you are still unable to open the reports.
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