How to handle Timed out receiving message from renderer: 300.000

[R. Sowmya]

 I am trying to run 30 browser automation testcases using testng testsuite. While running the testcases I get "Timed out receiving message from renderer: 300.000 " this at different places each time and it makes the testcase to wait even after the specified timeout.It also occurs at driver.getCurrentUrl() statement in before method at different testcases each time but the same before method works fine in other testcases.