Huge useless busy socket when using Java API

[Greg Whalin]

This is strange?  Seems as if connections are leaking, but only for one 
server (though the others look pretty high as well).  My initial 
thoughts would be some sort of networking problem, but just to be safe, 
can you let me know which version of the client you are running.  I will 
do some additional testing to look for possible memory leaks, and also 
to see if I can change the pool to look for hung connections and try to 
deal w/ them gracefully.  I should say that this does not seem like 
normal behavior for the client.  We have been running this client for 
some time w/ no such connection leaks or stability problems that I am 
aware of.

Greg

Michael Su wrote:
> Hi,
> 
> I've encounter a strange problem ... When using Java API, there are
> many connections in busy pool for the first one server after running
> 30~60 minutes. Other servers' busy pool also grow slowly.
> 
> How could I solve this strange problem? Thanks in advance. 
> 
> 
> Here's the debug message
> 
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Starting self maintenance....
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of avail pool for host ( 192.168.4.203:11211) = 8
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of busy pool for host (192.168.4.203:11211 ) = 190
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of avail pool for host (192.168.4.202:11211) = 2
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of busy pool for host ( 192.168.4.202:11211) = 3872
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Need to create 3 new sockets for pool for host: 192.168.4.202:11211
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of avail pool for host (192.168.4.205:11211) = 22
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of busy pool for host (192.168.4.205:11211) = 52
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of avail pool for host ( 192.168.4.204:11211) = 6
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - ++++
> Size of busy pool for host (192.168.4.204:11211 ) = 200
> com.danga.MemCached.SockIOPool Sun May 08 03:17:02 CST 2005 - +++
> ending self maintenance.
> 
> Here's my environment:
> 1. Resin 2.1.x on 4 machine
> 2. Memcache 1.1.11 on 4 machine
> 3. Init Code:
>          pool.setInitConn(5);
>         pool.setMinConn(5);
>         pool.setMaxConn(10);
>         pool.setMaxIdle(10000L);
>         pool.setMaintSleep(3000L);
>         pool.setSocketTO(500);
>         pool.setSocketConnectTO (500);
>         pool.setNagle(false);
> 4. Server List:
>         "192.168.4.202:11211", "192.168.4.203:11211", "
> 192.168.4.204:11211", "192.168.4.205:11211"