# Not all 3 xtradb cluster nodes are receiving connections

**URL:** <https://forums.percona.com/t/not-all-3-xtradb-cluster-nodes-are-receiving-connections/7986>\
**Category:** Percona XtraDB Cluster 5.x\
**Created:** [September 1, 2020, 5:10am UTC](https://forums.percona.com/t/not-all-3-xtradb-cluster-nodes-are-receiving-connections/7986 "2020-09-01T05:10:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![blacksensei](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/blacksensei/32/59_2.png) [@blacksensei](https://forums.percona.com/u/blacksensei)\
**Post date:** [September 1, 2020, 5:10am UTC](https://forums.percona.com/t/not-all-3-xtradb-cluster-nodes-are-receiving-connections/7986/1 "2020-09-01T05:10:18Z")

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Hello Here,

Sorry for the double post. I have currently posted on DB stackexchange [https://dba.stackexchange.com/questions/274545/percona-xtradb-cluster-5-7-solution-on-aws-and-on-premise-not-all-nodes-are-con](https://dba.stackexchange.com/questions/274545/percona-xtradb-cluster-5-7-solution-on-aws-and-on-premise-not-all-nodes-are-con) and looking at the number of views etc it looks like I should have posted it here.

For a little context on those here. The cluster seems to be fine and working well but , the “last” one doesn’t seem to be used at all by anything and I found that a bit odd so I am asking for a little guidance and help.

Thanks in advance.

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**Author:** ![matthewb](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthewb/32/34_2.png) [@matthewb](https://forums.percona.com/u/matthewb)\
**Post date:** [September 4, 2020, 10:51am UTC](https://forums.percona.com/t/not-all-3-xtradb-cluster-nodes-are-receiving-connections/7986/2 "2020-09-04T10:51:21Z")

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_Cross-posting answer for double points 🙂_

According to [the documentation][1], the JDBC connector will use the servers listed in the connectstring in order, while always reattempting to connect to the server before it. So, if you have A,B,C and A goes down, the connector will use B and will continue to use B until A comes back up. When A comes back online, the connector will resume using A. C will only get used if both A and B are down.

[1]: [https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-config-failover.html](https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-config-failover.html)