LinkedList Throws NoSuchElementException
Hi
I have a object of LinkedList and i m using it as a queue.
while queueing an element from it i use toString() to use its value becouse the values that are being enqueued are of type string
before dequeuing i check it using isEmpty() funtion but some time this funtion returns false and controll goes to else case. and when it dequeue the value it throw and exception NoSuchElementException.
In some cases the size of LinkedList it returns 0 and in some cases its size is equals to the number of values in the queue.
i m using jdk1.4.2_06
Any one can tell me the reason
it happens with irragular intervals of time.... becose values are equeqing and dequeing continously after some time interval.
if i use the jdk1.5 Queue Interface then what could be the advantages over this aproach. in later case i have to change the jdk
[881 byte] By [
12345789a] at [2007-11-26 21:44:12]
and the real scenrio is there is a servlet that accepts user requests and enqueue them
an other servlet laods a class that has a timer task , this timer task runs after 5 seconds and for the whole length of the queue. it dequeue 25 requests combine them and send to other class for processing it
reqeusts are dequeued in a block the first check whether queue is empty or not if queue is not empty it dequeue it at this point exception ocuures
> i know i have posted the same questions on two
> different forums ...you dont need to mention
> it..........
>
> i just want a reasonable answer IF any one has. If
> you dont then plz dont reply.................
*sigh* It's good that he mentioned it. Now I know that I shouldn't waste any more time on answering this thread.
> i know i have posted the same questions on two
> different forums ...you dont need to mention
> it..........
Don't you think maybe we might have a little better chance of helping if we had all the information?
> i just want a reasonable answer IF any one has. If
> you dont then plz dont reply.................
Just a note of adminition: If you didn't get a satisfactory answer in the other forum, cross-posting it over here probably isn't going to yield a significantly different answer if you continue to refuse to give useful information.
Did you check prior to this if there might be a similar issue prior to yours? Is this LinkedList a field in your servlet, perchance?
http://forum.java.sun.com/thread.jspa?threadID=5140283
first i checked
the linkedlist as a public static variable in the servlet to populate
then i tried to have a separete class that has a linkedlist as a class variable i provided a static reference of this class to use for insertion into the list and for removing the elements
but in both cases the result is same.
it is correct that many requests are comming to servlet and all are equeuing
each request first assigned to a vairable and then enqueued.
