Created
May 29, 2015 13:56
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Rudimentary check whether all servers/members of a ZooKeeper ensemble are synchronized / in sync.
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| $ for zk in `seq 1 3`; do echo stat | nc zookeeper${zk} 2181|egrep "^(Zxid|Node)"; done | |
| Zxid: 0x46d1b3ebc | |
| Node count: 4557 | |
| Zxid: 0x46d1b3ebc | |
| Node count: 4557 | |
| Zxid: 0x46d1b3ebf | |
| Node count: 4557 | |
| # All values should be the same, though with ongoing transactions from clients you might see the values | |
| # to diverge slightly (e.g. if you wait 1 second in between querying `stat` from zookeeper1 and zookeeper2, | |
| # zookeeper2's `Zxid` values might be "higher" simply because additional transactions were received and | |
| # processed during the 1sec wait). | |
| # | |
| # Of course there are other reasons why the values can be different -- legitimate failures like network | |
| # partitions are another cause, for example. |
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