java - Setting connection reference to null after closing it -

is required/good practice set connection reference null after closing it?

i closing connections in finally block.

conn.close(); conn = null; 

i facing connection wait timeout exception during performance testing maximum connections getting exceeded.

you'll see pattern in use when people want explicitly throw away reference, , aid garbage collection, , trigger finalisers. virtually redundant.

if conn variable used indicate new connection required (by making field, perhaps, , resetting null before later reference) that's different pattern, unrelated immediate resource management.