causal reads and mysqldump SST deadlock

Bug #928142 reported by Teemu Ollakka
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
MySQL patches by Codership
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Bug Description

Having wsrep_causal_reads=1 set on server level causes deadlock with mysqldump SST if there are any ongoing client operations on server. In particular, if any causal read from client gets scheduled in wsrep::causal_read() before SST script runs mysqldump, mysqldump operations get stuck waiting in wsrep::causal_read() too.

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