mirror of
https://github.com/MariaDB/server.git
synced 2025-08-30 11:22:14 +03:00
391f1aa6ee
Back port upstream fix commit 1800b015a1d487330f7b15f2020b887be348a66b Author: Venkatesh Duggirala <venkatesh.duggirala@oracle.com> Date: Fri Sep 8 20:29:22 2017 +0530 Bug#26027024 SLAVE_COMPRESSED_PROTOCOL DOESN'T WORK WITH SEMI-SYNC REPLICATION IN MYSQL-5.7 Analysis: In mysql-5.6, dump thread (the thread that is created on Master after Slave requested for a binlog dump) is also used to receive acknowledgements from the Slave and act on them accordingly. For performance reasons, a special thread called Ack Receiver thread is added in mysql-5.7 Semi synchronous replication plugin. This thread does not have special handling to receive acknowledgements if Slave has enabled compression in the protocol. Hence Master is unable to handle any slave if Slave_compressed_protocol is enabled on it. Fix: Enable compress flag on the communication channels if the Slave has Slave_compressed_protocol ON.
How to run. =========== ./mysql-test-run.pl --suite=rpl --mysqld=--binlog-format=mixed