galera.galera_wan fails in buildbot with Stray state UUID msg or with "Transport endpoint is not connected" or with a failure to start a node

galera.galera_wan 'xtradb'               w1 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2017-09-20 05:02:06

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2017-09-20  5:01:58 139778875975424 [Warning] WSREP: Stray state UUID msg: 5b8a7142-9de2-11e7-92fd-7653705dc645 from node 139775415681025 (unspecified), current group state WAIT_STATE_UUID

^ Found warnings in /run/shm/var/1/log/mysqld.2.err

ok

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2017-09-20  5:01:58 140461477975808 [Warning] WSREP: Stray state UUID msg: 5b8a7142-9de2-11e7-92fd-7653705dc645 from node 140458315481089 (unspecified), current group state WAIT_STATE_UUID

^ Found warnings in /run/shm/var/1/log/mysqld.3.err

ok

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2017-09-20  5:01:58 140114248324864 [Warning] WSREP: Stray state UUID msg: 5b8a7142-9de2-11e7-92fd-7653705dc645 from node 140110423130113 (unspecified), current group state WAIT_STATE_UUID

^ Found warnings in /run/shm/var/1/log/mysqld.4.err

ok

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2017-09-20  5:01:58 140116865570560 [Warning] WSREP: Stray state UUID msg: 5b8a7142-9de2-11e7-92fd-7653705dc645 from node 140114718097409 (debian7-wheezy-amd64), current group state WAIT_STATE_UUID

^ Found warnings in /run/shm/var/1/log/mysqld.1.err

ok

galera.galera_wan 'innodb_plugin'        w2 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2017-10-22 21:07:40

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2017-10-22 21:07:31 140509163022080 [Warning] WSREP: Sending JOIN failed: -107 (Transport endpoint is not connected). Will retry in new primary component.

^ Found warnings in /run/shm/var/2/log/mysqld.1.err

ok

galera.galera_wan 'innodb'               w4 [ fail ]

        Test ended at 2017-10-12 07:26:02

CURRENT_TEST: galera.galera_wan

Failed to start mysqld.3

mysqltest failed but provided no output

 - saving '/run/shm/var/4/log/galera.galera_wan-innodb/' to '/run/shm/var/log/galera.galera_wan-innodb/'

Retrying test galera.galera_wan, attempt(2/3)...

worker[4] > Restart  - not started

worker[4] > Restart  - not started

worker[4] > Restart  - not started

worker[4] > Restart  - not started

***Warnings generated in error logs during shutdown after running tests: galera.galera_wan

2017-10-12  7:26:00 139893572536096 [Note] WSREP: (0e4a956d, 'tcp://0.0.0.0:16050') turning message relay requesting on, nonlive peers: tcp://127.0.0.1:16044 tcp://127.0.0.1:16047 tcp://127.0.0.1:16053 

2017-10-12  7:26:01 139893572536096 [Note] WSREP: (0e4a956d, 'tcp://0.0.0.0:16050') reconnecting to 0e3c3aaa (tcp://127.0.0.1:16044), attempt 0

2017-10-12  7:26:01 139893572536096 [Note] WSREP: (0e4a956d, 'tcp://0.0.0.0:16050') reconnecting to 0e42b217 (tcp://127.0.0.1:16047), attempt 0

2017-10-12  7:26:01 139893572536096 [Note] WSREP: (0e4a956d, 'tcp://0.0.0.0:16050') reconnecting to 0e48f79a (tcp://127.0.0.1:16053), attempt 0

2017-10-12  7:26:01 139893572536096 [ERROR] WSREP: failed to open gcomm backend connection: 110: failed to reach primary view: 110 (Connection timed out)

	 at gcomm/src/pc.cpp:connect():158

2017-10-12  7:26:01 139893572536096 [ERROR] WSREP: gcs/src/gcs_core.cpp:gcs_core_open():208: Failed to open backend connection: -110 (Connection timed out)

2017-10-12  7:26:01 139893572536096 [ERROR] WSREP: gcs/src/gcs.cpp:gcs_open():1404: Failed to open channel 'my_wsrep_cluster' at 'gcomm://127.0.0.1:16044': -110 (Connection timed out)

2017-10-12  7:26:01 139893572536096 [ERROR] WSREP: gcs connect failed: Connection timed out

2017-10-12  7:26:01 139893572536096 [ERROR] WSREP: wsrep::connect(gcomm://127.0.0.1:16044) failed: 7

2017-10-12  7:26:01 139893572536096 [ERROR] Aborting