[System Test] Rebalance failure - Cannot find an available shard, all candidate shards (num: 1) are under transfer or restore

[user:error,2024-01-25T18:00:39.823-08:00,ns_1@172.23.97.67:<0.22016.0>:ns_orchestrator:log_rebalance_completion:1661]Rebalance exited with reason {service_rebalance_failed,index,

                              {worker_died,

                               {'EXIT',<0.15135.308>,

                                {task_failed,rebalance,

                                 {service_error,

                                  <<"Error creating slice Unable to initialize /data/@2i/bucket1_idx8_smeBu_12604540048321060787_3.index/mainIndex, err = Cannot find an available shard, all candidate shards (num: 1) are under transfer or restore, retry later">>}}}}}.

[user:error,2024-01-25T18:08:12.030-08:00,ns_1@172.23.97.67:<0.22016.0>:ns_orchestrator:log_rebalance_completion:1661]Rebalance exited with reason {service_rebalance_failed,index,

                              {worker_died,

                               {'EXIT',<0.31589.310>,

                                {task_failed,rebalance,

                                 {service_error,

                                  <<"Error creating slice Unable to initialize /data/@2i/bucket1_idx8_smeBu_12604540048321060787_3.index/mainIndex, err = Cannot find an available shard, all candidate shards (num: 1) are under transfer or restore, retry later">>}}}}}.

Rebalance Operation Id = ec5693f15bfb725e2009b681bee8850b