memory leak? a problem about DownstreamMessageEvent

Tue Jan 4 02:19:32 EST 2011

ok  thank you  ,  it is that jhat service  can help you?

Upstream network tech.  Ltd.

Chris Cheung

focus on java,c programming language and linux core

On Tue, Jan 4, 2011 at 15:10, Trustin Lee [via Netty Forums and Mailing
Lists] <ml-node+5887812-1030514654-309534 at n2.nabble.com<ml-node%2B5887812-1030514654-309534 at n2.nabble.com>
> wrote:

> It seems to take almost eternity to download the heap dump.  Let me get
> back to you once I finish downloading it and have a chance to analyze it.
>
> On 01/04/2011 02:10 PM, chris wrote:
>
> >
> > the problem about decoder i had resolved at last week , i found the core
> > problem was i config the decoder and handler as singleton,now it were not
>
> > singleton,  but the memory leak still exist.
> > i upload the jmap dump file at http://121.101.216.141:8080/0104dump
> >
> > and i startup the jhat service at http://121.101.216.141:11411
> >
> > if you can not access http://121.101.216.141:11411  please just wait for
> a
> > moment ,because the 0104dump size=2.7G, i'm startup jhat at  13:10
> >
> > i'm waiting for your reply online.
> >
> >
> >
> > Upstream network tech.  Ltd.
> >
> > Chris Cheung
> >
> > focus on java,c programming language and linux core
> >
> >
> >
> > On Tue, Jan 4, 2011 at 10:40, Trustin Lee [via Netty Forums and Mailing
> > Lists] <[hidden email]<http://user/SendEmail.jtp?type=node&node=5887812&i=0>
> <[hidden email] <http://user/SendEmail.jtp?type=node&node=5887812&i=1>>
> >> wrote:
> >
> >> Could you upload the heap dump somewhere?
> >>
> >> --
> >> Trustin Lee - http://gleamynode.net/
> >> Sent from a mobile device - please excuse the brevity.
> >>
> >> On Jan 3, 2011, at 2:06 PM, chris <[hidden email]<
> http://user/SendEmail.jtp?type=node&node=5887462&i=0>>
> >> wrote:
> >>
> >>>
> >>> i'm developing a webgame,when i was doing performance testing(based on
> 8k
> >>
> >>> online user)  for one day(about 15 hours),
> >>> i found  memory size jvm used was 4.8G ,i dump the memory by jmap,and
> >>> startup the jhat viewer,  the top 12 classes as follower:
> >>>
> >>> 307739 instances of class
> org.jboss.netty.channel.DownstreamMessageEvent
> >>> 297635 instances of class
> >>> org.jboss.netty.util.internal.LinkedTransferQueue$Node
> >>> 227420 instances of class
> >> org.jboss.netty.buffer.BigEndianHeapChannelBuffer
> >>> 159719 instances of class org.jboss.netty.channel.DefaultChannelFuture
> >>> 152708 instances of class
> >>>
> org.jboss.netty.channel.socket.nio.SocketSendBufferPool$PooledSendBuffer
> >>> 138592 instances of class
> >>> org.jboss.netty.channel.DefaultWriteCompletionEvent
> >>> 132096 instances of class
> org.jboss.netty.buffer.DuplicatedChannelBuffer
> >>> 120310 instances of class org.jboss.netty.buffer.DynamicChannelBuffer
> >>> 107109 instances of class org.jboss.netty.channel.UpstreamMessageEvent
> >>> 76816 instances of class
> >>> org.jboss.netty.util.internal.ConcurrentHashMap$Segment
> >>> 76816 instances of class
> >>> [Lorg.jboss.netty.util.internal.ConcurrentHashMap$HashEntry;
> >>> 65074 instances of class
> >>> org.jboss.netty.util.internal.ConcurrentHashMap$ValueIterator
> >>>
> >>> i can not get why the instance count of DownstreamMessageEvent and
> >>> UpstreamMessageEvent is so high?  can you  help me?
> >>> thanks all.
> >>> --
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> --
> Trustin Lee, http://gleamynode.net/
>
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