3780969 - Fiori tiles are inaccessible on one application server with HTTP 500 and STRING_BAD_REF dump

• All Fiori tiles are inaccessible when requests land on one specific application server.
• Requests routed to the other application server work.
• Browser shows HTTP 500 while accessing the Fiori UI.
• SM21 on the affected server logs error STRING_BAD_REF (e.g., “error during logon”, “cfunction ab_StrRefSTRHPTR”, “errcode STRING_BAD_REF”).
• Issue time window observed around a specific timestamp.

• SAP NetWeaver
• ABAP Runtime Environment - ABAP Language Issues Only

fiori tiles, http 500, sm21, STRING_BAD_REF, cl_icf_shm_area, icf shared memory, shared objects, shmm, invalidate area, flp, attach_for_read, shared memory corruption, dual app server, instance-specific error, abap dumps , KBA , BC-ABA , ABAP Runtime Environment - ABAP Language Issues Only , Problem