sometimes show hosts don't display version

[HarrisChu]

when verify client version, if the meta leader change, and then cannot write version key in metad.

(root@nebula) [(none)]> show hosts
+-----------------+------+----------+--------------+----------------------+------------------------+----------+
| Host            | Port | Status   | Leader count | Leader distribution  | Partition distribution | Version  |
+-----------------+------+----------+--------------+----------------------+------------------------+----------+
| "192.168.15.13" | 3772 | "ONLINE" | 16           | "sf1:9, sf100:7"     | "sf1:24, sf100:24"     | "v3.0.0" |
| "192.168.15.13" | 2772 | "ONLINE" | 32           | "sf1:15, sf100:17"   | "sf1:24, sf100:24"     | "v3.0.0" |
| "192.168.15.13" | 1772 | "ONLINE" | 0            | "No valid partition" | "sf1:24, sf100:24"     |          |
+-----------------+------+----------+--------------+----------------------+------------------------+----------+
Got 3 rows (time spent 2872/4624 us)

Mon, 07 Feb 2022 07:30:19 UTC

steps:

1. deploy three nebula in one hosts, e.g. nebula1, nebula2, nebula3.
2. run

for i in `seq 1 3`;do ./nebula$i/scripts/nebula.service start all;done

[CPWstatic]

Thanks, we should verify the result of doSyncPut.