This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Hi, I have a demo application in which there is a link..If user Clicks on that link i increment the counter in my database table.The counter field has type bigint. After trial run ...When i see the counter value in the database then it is Reseted to 2...After trial run it has value 250 but it Shows counter now 2 why this is happen ??? is there any problem of Concurrency ??
It depends on your code..... But one thing seems very obvious..
you might have done something like you intialized the variable , started incrementing that and putting in database.So, the problem is when the Servlet reloads that variable might be again setted to its intial value.