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| Error Code | Detail |
| 101000 | Receiver input/output error sending |
| 101001 | Receiver input/output error receiving |
| 101500 | Sender input/output error sending |
| 101501 | Sender input/output error receiving |
| 101503 | Connection failed |
| 101504 | Connection timed out |
| 101505 | Connection closed |
| 101506 | NHTTP protocol violation |
| 101507 | Connection canceled |
| 101508 | Connection timed out |
| 101509 | Send abort |
| 101510 | Response processing failed |
Endpoint Failures
This section describes the error codes for endpoint failures. For more information on handling endpoint errors, see Endpoint Error Handling.
General Errors
| Error Code | Detail |
| 303000 | Load Balance endpoint is not ready to connect |
| 303000 | Recipient List Endpoint is not ready |
| 303000 | Failover endpoint is not ready to connect |
| 303001 | Address Endpoint is not Ready to connect |
| 303002 | WSDL Address is not ready to connect |
Failure on Endpoint in the Session
| Error Code | Detail |
| 309001 | Session aware load balance endpoint, No ready child endpoints |
| 309002 | Session aware load balance endpoint, Invalid reference |
| 309003 | Session aware load balance endpoint, Failed session |
Non-Fatal Warnings
| Error Code | Detail |
| 303100 | A failover occurred in a Load balance endpoint |
| 304100 | A failover occurred in a Failover endpoint |
Referring Real Endpoint is Null
| Error Code | Detail |
| 305100 | Indirect endpoint not ready |
Callout Operation Failed
| Error Code | Detail |
| 401000 | Callout operation failed (from the callout mediator) |
| Info |
|---|
For information on best practices for handling errors in WSO2 ESB, see WSO2 ESB by Example - Best practices for error handling on the WSO2 ESB. |