Hi,

We have a recurrent error on version 2.1.11, while routing traffic to the 
DB (on a 3 node setup), while we are using only one of the nodes as of now, 
because we have had other issues with the distributed nodes.

The error we hit every time we send traffic is about the maximum number of 
concurrent sessions reached. (Please see the snapshot of error as under). 

2016-03-04 10:17:00:594 WARNI Reached maximum number of concurrent 
connections (max=1000, current=1000), reject incoming connection from 
/10.43.1.238:43635 [OServerNetworkListener] 

The client server config for DB pool is:

orient.db.minPool = 50
orient.db.maxPool =100

At the time of this error the netstats at the client is:


150 TIME_WAIT
99 ESTABLISHED
10 LISTEN
1 SYN_SENT


The stand alone Server Config is:

<handler 
class="com.orientechnologies.orient.graph.handler.OGraphServerHandler"
<parameters
<parameter name="enabled" value="true"/
<parameter name="graph.pool.max" value="50"/
</parameters
</handler

<entry name="db.pool.min" value="100”/
<entry name="db.pool.max" value="400"/ >

At the time of error the Server Network Stats:

netstat -a | grep -i client-server | egrep -c 'ESTABLISHED|LISTEN|TIME'
949 
Breakup of connections:
576 TIME_WAIT
330 ESTABLISHED
13 LISTEN 

H/W config:

OS - DEBIAN squeeze 64 bit, JAVA 7, RAM 48G, dual Hex core.

We are afraid to increase the default limit of network connections (1000) 
and want to dig out why orientdb server compaints of max connections . 
Would be interested in knowing the lifecycle of OClientConnection, so as to 
help us understand how does the transaction opens and closes.


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