3336716 - Web service jobs fail with "Unknown error communicating with server" message - SAP Data Services 4.x

• Web service jobs are failing with the following message.

                XML-243003: |Data flow |Transform Q_Function5
                                                       Unknown error communicating with server.

• Applied SAP Note 1771712, which didn’t resolve the issue.
• Checked that the certificates are all valid.
• Checked that the user connecting to Web service is active and a valid password is maintained on Data Services and Web service side.
• Checked the Axis2.log file and found.

[debug] ..\..\src\core\transport\http\sender\http_sender.c(422) msg_ctx_id:urn:uuid:f229700e-3f4c-4238-b696-e591295d1949
[info]  [ssl client] Client certificate chain filenot specified
[error] ..\..\src\core\transport\http\sender\ssl\ssl_utils.c(273) [ssl client] SSL certificate verification failed (error:00000014:lib(0):func(0):reason(20))
[error] ..\..\src\core\transport\http\sender\ssl\ssl_stream.c(105) Error occurred in SSL engine
[error] ..\..\src\core\transport\http\sender\http_client.c(297) Data stream creation failed for Host <servername> and <port number> port
[error] ..\..\src\core\transport\http\sender\http_client.c(554) client data stream null or socket error for host <> and <port number> port
[error] ..\..\src\core\transport\http\sender\http_client.c(558) A read attempt(HTTP) for the reply without sending the request
[error] ..\..\src\core\transport\http\sender\http_sender.c(1389) status_code < 0
[error] ..\..\src\core\engine\engine.c(179) Transport sender invoke failed.

• SAP Data Services 4.x
• All Supported Platforms

SSL client, SSL certificate verification failed (error:00000014:lib(0):func(0):reason(20)), Unknown error communicating with server, XML-243003, 243003,bods,Web Services,SAP Data Services,SNI , KBA , EIM-DS-EXE , Job Execution , Problem