}

			idx := pinfo.Index

			mu.Lock()
			defer mu.Unlock()

			poolObjIdxMap[idx] = append(poolObjIdxMap[idx], obj)
			origIndexMap[idx] = append(origIndexMap[idx], j)
			return nil
		}, j)
	}

	eg.Wait() // wait to check all the pools.

	if len(poolObjIdxMap) > 0 {
		// Delete concurrently in all server pools.
		var wg sync.WaitGroup
		wg.Add(len(z.serverPools))