In threads i see

Native-Transport-Request:1
.
to
.
Native-Transport-Request:128

Total : 252 threads
Heap Use : 600MB
Heap Commited : 1GB
Heap Max : 8GB
CURRRENT SIZE OF CASSANDRA LOG+CACHE+DATA folders =  249MB

IMPORTANT OBSERVATION :
There is no message on cassandra console after timestamp INFO 02:04:12,590
AT 02:11:00 my threads reduced from 263 to 68...ALL Native-Transport-Request0-128 KILLED....
No error came on my application.........MORE than an 30mins NO MESSAGE CAME ON CASSANDRA console...


THREADS :


Name: Native-Transport-Requests:1
State: TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@7a0141ab
Total blocked: 24,842  Total waited: 47,722

Stack trace: 
 sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:424)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:955)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:917)
java.lang.Thread.run(Thread.java:662)





Name: Native-Transport-Requests:2
State: TIMED_WAITING on org.apache.cassandra.utils.SimpleCondition@13dabc60
Total blocked: 15,963  Total waited: 34,334

Stack trace: 
 java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:443)
java.util.concurrent.TimeUnit.timedWait(TimeUnit.java:292)
org.apache.cassandra.utils.SimpleCondition.await(SimpleCondition.java:50)
org.apache.cassandra.service.AbstractWriteResponseHandler.get(AbstractWriteResponseHandler.java:83)
org.apache.cassandra.service.StorageProxy.mutate(StorageProxy.java:199)
org.apache.cassandra.cql3.statements.ModificationStatement.execute(ModificationStatement.java:99)
org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:118)
org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:240)
org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:121)
org.apache.cassandra.transport.Message$Dispatcher.messageReceived(Message.java:287)
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:565)
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:793)
org.jboss.netty.handler.execution.ChannelUpstreamEventRunnable.doRun(ChannelUpstreamEventRunnable.java:45)
org.jboss.netty.handler.execution.ChannelEventRunnable.run(ChannelEventRunnable.java:69)
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
java.lang.Thread.run(Thread.java:662)



Name: Native-Transport-Requests:3
State: TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@7a0141ab
Total blocked: 19,032  Total waited: 38,073

Stack trace: 
 sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:424)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:955)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:917)
java.lang.Thread.run(Thread.java:662)







Name: Native-Transport-Requests:4
State: TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@7a0141ab
Total blocked: 21,460  Total waited: 42,473

Stack trace: 
 sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:424)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:955)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:917)
java.lang.Thread.run(Thread.java:662)



Name: Native-Transport-Requests:6
State: TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@7a0141ab
Total blocked: 22,708  Total waited: 42,092

Stack trace: 
 sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:424)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:955)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:917)
java.lang.Thread.run(Thread.java:662)