ProxytoSoap - Read timed out

Hello Guys,

In simple synchronous proxy to soap I'm facing exception:

com.sap.engine.interfaces.messaging.api.exception.MessagingException: java.net.SocketTimeoutException: Read timed out

It happens randomly (3 times per 100 requests). Normally response comes in 1 second. Messages are very small.

1. Service is available. Tried to test it with soapui using load testing. Every response (tried 200 requests) comes within seconds.

2. I increased XMBWS.Timeout to 3 minutes and HTTP_TIMEOUT of integration engine to 3 minutes.

Now exception is

com.sap.engine.interfaces.messaging.api.exception.MessageExpiredException: Message 55f56f4d-636c-0810-e100-8000c0a80a46(INBOUND) expired

or

com.sap.engine.interfaces.messaging.api.exception.MessagingException: java.net.SocketException: Connection reset

3. I've spoken to network guys. No firewall issue or anything on their site.

Any clues?