Pallavi,
It might be an issue with the Tomcat running out of memory.
Can you please check this thread which discusses similar issue and try the suggestions?
http://stackoverflow.com/questions/19769675/tomcat-7-outofmemoryerror-from-uncaughtexceptionhandler
If the Tomcat environment is right, then can you please try increasing the -Xmx value in the myeclipse.ini file (located in the MyEclipse installation directory) and see if it helps ? Try increasing the -Xmx value by 100 each time and check.
If the issue persists even after increasing the memory, then please give us some more information :
1. Are you working with a large workspace ? If yes approximately how many MB?
2. Please share the MyEclipse Installation Details from MyEclipse > Installation Summary > Installation Details.
3. Also share the .log file which is located at /.metadata/.log for further investigation. Before sending us the .log file, clear its contents and replicate the issue.
Alternatively, it is possible to make use of jVisualVM directly, which has the profiling capability used by our previous functionality. Refer to this tutorial for more information about how to run jvisualvm.exe (part of any Oracle JDK) : https://docs.oracle.com/javase/8/docs/technotes/guides/visualvm/intro.html
Hope this helps.Let us know how it works for you.
–Swapna
MyEclipse Support