While processing message adapter was called twice.

Hello,

i'm using SAP XI/PI 7.11 (Dual Stack). Recently i have met a problem in a synchronous web service (SOAP -> XI/PI -> RFC):

Mapping program is not available in runtime cache: Object ID 602A4FBB72ED330EA5EE10C48D91BD3E Software Component 373DD8319E2611DFB255FC2DC1174885

The payloads of the answer is:

RFC_ERROR_SYSTEM_FAILURE

Specify one object in the objectlist

Then i have refreshed the cache (SXI_CACHE and SXMB_IFR). But it does not work. Now i found the difference: if one message is processed successfully, adapter-call occurs once. if the error is coming, adapter-call occurs twice. i have also attached one screenshot. Could someone know the reason? thx.

Best regards,

Fanglin Ye