This type of disconnection occurs when there's a read timeout from one of the 
bookies. The cause could be something crashing on the bookie side, or simply a 
very slow network. What type of network are you running this in?
Do you have any logs on the bookie side? 

-Ivan

On 3 Apr 2012, at 03:22, Aniruddha Laud wrote:

> While sending requests to a hedwig hub, the hub seems to disconnect from
> the bookies and never connects back. The logfile contains
> 
> 2012-04-02 22:33:09,207 - INFO [Hashed wheel timer
> #3:PerChannelBookieClient@409] - Disconnected from bookie: /
> 10.35.84.103:3181
> 2012-04-02 22:33:09,211 - INFO [Hashed wheel timer
> #4:PerChannelBookieClient@409] - Disconnected from bookie: /
> 10.34.133.114:3181
> 2012-04-02 22:33:09,214 - INFO [Hashed wheel timer
> #5:PerChannelBookieClient@409] - Disconnected from bookie: /
> 10.35.89.103:3181
> 2012-04-02 22:33:09,217 - INFO [Hashed wheel timer
> #8:PerChannelBookieClient@409] - Disconnected from bookie: /
> 10.35.91.102:3181
> 2012-04-02 22:33:09,247 - INFO [Hashed wheel timer
> #10:PerChannelBookieClient@409] - Disconnected from bookie: /
> 10.34.234.125:3181
> 2012-04-02 22:33:09,256 - INFO [Hashed wheel timer
> #7:PerChannelBookieClient@409] - Disconnected from bookie: /
> 10.34.235.129:3181
> 
> Some time before getting this message, the "Got response for ..." messages
> stop and there are only "Successfully wrote request ..." messages in the
> hedwig log file. The bookkeeper log-file shows no indication of the
> connection being lost. All the bookies and hedwig hubs are up and running
> and I am able to connect to them with the hedwig console and able to create
> new topics and publish/subscribe to them. But I'm not able to publish or
> subscribe to the topic that caused the errors. About 200,000 entries were
> created in the topic that caused this error.
> 
> I'm unable to attach the log files or even portions of it, because the
> relevant portions are around 3MB.
> 
> Regards,
> Aniruddha.

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