3407750 - Replication not working post system refresh showing INITIALIZING constantly

HANA System Replication initialisation of a secondary site shows status 'INITIALIZING' and 'Connection lost during datashipping - resume on reconnect' constantly over a longer than expected time period.

Indexserver on secondary frequently restarting with no crashdump trace.

Indexserver trace on secondary shows error:

 e Memory           mmShmAllocator.cpp(00191) : shared memory allocation failed: exception  1: no.71000004  (Basis/SharedMemory/impl/ptl_shm.cpp:411) TID: 3484360
    ShmSystem::create (size=67108864) - No space left on device

Allocation failed ; $failure_type$=SHM_GET_FAILED; $failure_flag$=; $size$=67108864; $name$=<unnamed>; $type$=shm; $inuse_count$=11933; $allocated_size$=xxxx

SAP HANA, platform edition 2.0

shared memory, allocation filed, no space left on device, shmmax, INITIALIZING, Connection lost during datashipping - resume on reconnect, shmmni, shmall, sysctl, replication, network, memory, secondary, parameter, linux kernel, register, unregister , KBA , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) , Problem