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From André Warnier ...@ice-sa.com>
Subject Re: seeing RemoteEndpoint.Basic BINARY_FULL_WRITING errors under load in Tomcat 7.0.48-dev (trunk)
Date Tue, 10 Dec 2013 08:38:02 GMT
Mark Thomas wrote:
> On 09/12/2013 22:16, Bob DeRemer wrote:
> 
>> It appears that we are getting the following IOException:
>>
>> java.io.IOException: java.util.concurrent.TimeoutException
>> immediately before we got the BINARY_FULL_WRITING errors.
>>
>> Would this TimeoutException be caused because the underlying socket
>> did not receive an ACK for the sent websocket message, or could
>> something else cause this when trying to write to the websocket?
> 
> My experience debugging IO issues with WebSocket is that a write is
> reported to Tomcat as complete once it has been written to the TCP
> output buffer. Tomcat has no visibility what happens after that point.
> 
> All you can really be sure of when you see the TimeoutException is that
> Tomcat has not been able to write the data it was trying to write to the
> TCP output buffer within the time it was given to complete the write.
> 
> Possible causes are:
> - client is reading data more slowly than Tomcat is writing it
> - client has silently dropped the connection

- something else between Tomcat and the client has silently dropped the connection 
(gateway, firewall,..)

> - the machine where Tomcat is running is is overloaded it can't write
> the data fast enough
> 
> My money would be on the first two options rather than the third.
> 
> HTH,
> 
> Mark
> 
> 
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