One of the way to resolve java.lang.OutOfMemoryError is by running Jmeter in non-gui-mode.
First prepare your test plan with Jmeter and save it, let's say the file name is 'script.jmx'.
Second Apache JMETER_HOME/bin folder using command shell. And then run Jmeter with the following parameters, to execute the test.
Command :
jmeter -n -t C:\TestScripts\script.jmx -l C:\TestScripts\scriptresults.jtl
-n [This specifies JMeter is to run in non-gui mode]
-t [name of JMX file that contains the Test Plan]
-l [name of JTL file to log sample results to]
-j [name of JMeter run log file].
Test is running the results will be saved in the 'mytest_results.jtl'
