# node hangs on SET GLOBAL wsrep\_cluster\_address='gcomm://';

**URL:** <https://forums.percona.com/t/node-hangs-on-set-global-wsrep-cluster-address-gcomm/2461>\
**Category:** Percona XtraDB Cluster 5.x\
**Created:** [August 8, 2012, 11:44pm UTC](https://forums.percona.com/t/node-hangs-on-set-global-wsrep-cluster-address-gcomm/2461 "2012-08-08T23:44:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![abdel](https://avatars.discourse-cdn.com/v4/letter/a/a6a055/32.png) [@abdel](https://forums.percona.com/u/abdel)\
**Post date:** [August 8, 2012, 11:44pm UTC](https://forums.percona.com/t/node-hangs-on-set-global-wsrep-cluster-address-gcomm/2461/1 "2012-08-08T23:44:04Z")

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We have 3 nodes. I would like to make node 1 as the master but hangs after the following:

mysql\> SET wsrep\_on=0;  
mysql\> SET GLOBAL wsrep\_cluster\_address=‘gcomm://’;

What did I do wrong? how to pull a node from cluster?

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<div class="post-metadata">

**Author:** ![lefred](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/lefred/32/16885_2.png) [@lefred](https://forums.percona.com/u/lefred)\
**Post date:** [August 14, 2012, 1:38am UTC](https://forums.percona.com/t/node-hangs-on-set-global-wsrep-cluster-address-gcomm/2461/2 "2012-08-14T01:38:15Z")

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With PXC you don’t have master, all the nodes are master and all the nodes are slaves. Despite it’s possible to write always on the same node (it could even be recommended on certain workload).

Why do you set wsrep\_on=0 ?

I don’t understand what you want to try to achieve here.

Regards,

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<div class="post-metadata">

**Author:** ![abdel](https://avatars.discourse-cdn.com/v4/letter/a/a6a055/32.png) [@abdel](https://forums.percona.com/u/abdel)\
**Post date:** [August 14, 2012, 3:12am UTC](https://forums.percona.com/t/node-hangs-on-set-global-wsrep-cluster-address-gcomm/2461/3 "2012-08-14T03:12:56Z")

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What I would like to achieve is the following assuming I have 3 nodes:

1. Bring down node 1.
2. Node 2 and Node 3 are in sync. This works.
3. Turn on node 1

Result:  
Node 1 should pull the changes from either node 2 or node 3.

Thanks,