using Jmeter with non-GUI for test plan - jmeter

Question

i have faced a weird problem
i run 300 users simultaneously to log in to a website and read a file
i used the non-GUI mode to do this test plan
my problem is that this test plan have passed for just one time then when i run it again it get error then i tried to reduce the number of users to 200 and it passed but again after a while it did not.
Here is what i get:
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=64m; support
was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; sup
port was removed in 8.0
Creating summariser <summary>
Created the tree successfully using C:\Users\samo\Dropbox\Jmeter\jmetet\Reading_
script.jmx
Starting the test # Mon Jul 07 13:24:11 GMT+03:00 2014 (1404728651964)
Waiting for possible shutdown message on port 4445
summary + 1980 in 48s = 41.6/s Avg: 5536 Min: 6 Max: 21171 Err: 77
2 (38.99%) Active: 300 Started: 300 Finished: 0
summary + 1272 in 40.1s = 31.7/s Avg: 3257 Min: 3 Max: 39796 Err: 3
1 (2.44%) Active: 192 Started: 300 Finished: 108
summary = 3252 in 77.4s = 42.0/s Avg: 4644 Min: 3 Max: 39796 Err: 80
3 (24.69%)
summary + 1203 in 70s = 17.2/s Avg: 6020 Min: 3 Max: 69837 Err: 5
8 (4.82%) Active: 84 Started: 300 Finished: 216
summary = 4455 in 107s = 41.5/s Avg: 5016 Min: 3 Max: 69837 Err: 86
1 (19.33%)
summary + 608 in 100s = 6.1/s Avg: 6753 Min: 3 Max: 78722 Err: 4
2 (6.91%) Active: 7 Started: 300 Finished: 293
summary = 5063 in 137s = 36.9/s Avg: 5224 Min: 3 Max: 78722 Err: 90
3 (17.84%)
summary + 37 in 41s = 0.9/s Avg: 4880 Min: 4 Max: 37736 Err: 1
7 (45.95%) Active: 0 Started: 300 Finished: 300
summary = 5100 in 142s = 35.9/s Avg: 5222 Min: 3 Max: 78722 Err: 92
0 (18.04%)
Tidying up ... # Mon Jul 07 13:26:34 GMT+03:00 2014 (1404728794704)
... end of run
what did i miss to face this problem?
and how to know if the problem is out of memory or something else

Answer 1

hi guys i have figured out the problem
1- First of all i changed the heap size in the properties file in the bin folder to be:
BEFORE: set HEAP=-Xms512m -Xmx512m AFTER: set HEAP=-Xms2048m -Xmx2048m
2- Removed all the listeners i used before
3- Set the ramp up time in the thread group interface to be 180.
Ramp-Up before making changes was set to 1 which is not realistic because Jmeter can not run all the 300 users in 1 second
4- Set the loop count in the thread group interface to be 2
the error that i get before making these change was
java.net.SocketException,Non HTTP response message: Connection reset
which means that the server closed the connection
hope this can help someone out there