Hi @amar.khavare,
how much memory you have allocated to KNIME in the knime.ini?
->in the knime executor / knime server configuration
How can I increase the Java Heap Space for KNIME?
In the KNIME installation directory there is a file called knime.ini (under Linux it might be .knime.ini; for MacOS: right click on KNIME.app, select “Show package contents”, go to “/Contents/Eclipse/” and you should find a Knime.ini). Open the file,
Find the entry -Xmx1024m and change it to -Xmx4g or higher (for example).
(Re)start KNIME.