PI to BPM - Error in call over HTTP: HTTP 0 null

Hi,

I am using PI 7.31 single stack.

I am making a PI to BPM scenario. When message is going from PI to BPM ,i am getting below error :

Failed to call the endpoint: Error in call over HTTP: HTTP 0 null

SOAP: Call failed: java.net.SocketTimeoutException: Read timed out

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

Any pointers for it.