Re: [jgroups-dev] JGroup - Connection broken

appreciate your prompt reply.

This leads 2 quick questions: 

1) what is default value of Conn_expire_time?

2) Can you please confirm understanding of relationship of Failure detection
( time out = 2 seconds, max tries = 30 ) and connection expire time?

2 JVM (A & B) : 

JVM A running 35 seconds full GC which stops-the-world 
JVM B will detect failure of JVM A only after 60 seconds (2 * 30 ) 
JVM A becomes responsive after 35 seconds but by the time TCP connection
already closed as it passes conn_expire_time, gets broken pipe error

In this case setting only FD parameter does not help.  Is this correct? 



Bela Ban wrote:
> 
> 
> 
> On 11/26/12 11:26 PM, Dalal wrote:
>>
>> Hi,
>>
>> We are aware that newer version 3.X+ series has many new features as well
>> defect fixes. Due to release schedule and testing effort, we are continue
>> on
>> 2.8.0 GA version.
>>
>> Please, help to identify the impact of following parameter:
>>
>> tcp.conn_expire_time
> 
> http://www.jgroups.org/manual-3.x/html/protlist.html#TCP
> 
> If a connection is idle for more than conn_expire_time ms, it will be 
> closed. 0 disables this.
> 
> 
> 
>> What I want to confirm is, if JVM running longer GC like 30+ Seconds,
>> would
>> this kill TCP connection due to not setting above parameter?
> 
> 
> No, the connection has to be idle, e.g. no incoming or outgoing traffic.
> 
> 
>> By the way, we are setting FD (TimeOut & MaxTries ) which has combine
>> effects of 60 Seconds.
>>
>> Thanks,
>> Kamal.
>>
> 
> -- 
> Bela Ban, JGroups lead (http://www.jgroups.org)
> 
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