-Is it safe to have static methods in Hadoop Framework
Huy Pham 2013-07-25, 18:46
I am writing a class (called Parser) with a couple of static functions because I don't want millions of instances of this class to be created during the run.
However, I realized that Hadoop will eventually produce parallel jobs, and if all jobs will call static functions of this Parser class, would that be safe?
In other words, will all hadoop jobs share the same class Parser or will each of them have their own Parser? In the former case, if all jobs share the same class, then if I make the methods synchronized, then the jobs would need to wait until the locks to the functions are released, thus that would affect the performance. However, in later case, that would not cause any problem.
Can someone provide some insights?