MySQL Cluster - When rebooting a data node machine on a 4 machine cluster it hangs SQL nodes -


i have mysql cluster 4 machines such (example ip's): 

[ndbd(ndb)] 2 node(s)  id=1    @1.1.1.1 (mysql-5.6.23 ndb-7.4.5, nodegroup: 0) id=2    @1.1.1.2 (mysql-5.6.23 ndb-7.4.5, nodegroup: 0, *)  [ndb_mgmd(mgm)] 2 node(s) id=49   @1.1.1.51 (mysql-5.6.23 ndb-7.4.5) id=52   @1.1.1.52 (mysql-5.6.23 ndb-7.4.5)  [mysqld(api)]   3 node(s) id=50 (not connected, accepting connect 1.1.1.51) id=55   @1.1.1.51 (mysql-5.6.23 ndb-7.4.5) id=56   @1.1.1.52 (mysql-5.6.23 ndb-7.4.5)

if cold reboot on either data node machine (id=1 or id=2) cannot run sql queries (on nodes 55 or 56) until data node machine comes online reboot. here errors:

error 1297 (hy000): got temporary error 4028 'node failure caused abort of transaction' ndbcluster

error 1205 (hy000): lock wait timeout exceeded; try restarting transaction

if stop data node first in ndb_mgm such 1 stop or 2 stop , reboot machine there no issue.

is correct behavior? if data node machine crashes or pulls plug on cluster inoperable (unable issue sql commands) until data node machine comes online? or doing wrong?

thanks in advance!


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