Well the new things are cool to test and learn. But it is not possible every time, to have smooth testing process. if you can’t get right software on your hand.
So there are great articles about this new plugin here you can follow all of them: Group Replication Topics
I must say that, plugin available for download as source code and as for Oracle Linux 6 x86_64 from -> labs.mysql.com
So if you want to try it with MySQL 5.7.8-rc2 on Ubuntu you should compile it with MySQL. But you will not be able to compile due to well known ‘boost’ dependency -> see BUG #78600
UPDATE to BUG 78600:
Pedro Gomes clarified the reason of failed compiling process. There must not be any “spaces” between cmake options specified with -DMYSQL_SERVER_CMAKE_ARGS=””. So we have working cmake command as follows:
cmake .. -DMYSQL_SERVER_SRC_DIR="/home/sh/Sandboxes/mysql-5.7.8-rc" -DMYSQL_SERVER_CMAKE_ARGS="-DMYSQL_DATADIR=/opt/mysql-5.7.8-grouprepl/datadir;-DSYSCONFDIR=/opt/mysql-5.7.8-grouprepl;-DWITH_SSL=system;-DMYSQL_TCP_PORT=3307;-DMYSQL_UNIX_ADDR=/opt/mysql-5.7.8-grouprepl/mysqld.sock;-DDEFAULT_CHARSET=utf8;-DDEFAULT_COLLATION=utf8_general_ci;-DWITH_DEBUG=1;-DCOMPILATION_COMMENT='Group Replication enabled MySQL-5.7.8';-DOPTIMIZER_TRACE=1;-DWITH_ZLIB=system;-DWITH_VALGRIND=1;-DCMAKE_C_FLAGS=-DHAVE_purify;-DCMAKE_CXX_FLAGS=-DHAVE_purify;-DDOWNLOAD_BOOST=1;-DWITH_BOOST=/home/sh/Sandboxes"
But even you have Oracle Linux 6 x86_64 and even you follow topics: 1. Corosync Guide 2. Getting Started with MySQL Group Replication
You will likely get “Segmentation Fault” after running START GROUP_REPLICATION:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc8ef2700 (LWP 3294)]
0x00007ffff625d532 in _int_malloc () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install corosynclib-1.4.7-2.el6.x86_64
(gdb) bt
#0 0x00007ffff625d532 in _int_malloc () from /lib64/libc.so.6
#1 0x00007ffff625e991 in malloc () from /lib64/libc.so.6
#2 0x00007ffff6acf0bd in operator new(unsigned long) () from /usr/lib64/libstdc++.so.6
#3 0x00007fffc8f5b2ab in Certifier::Certifier (this=0x7fffbc051d20)
at /export/home/pb2/build/sb_0-16452762-1441960761.59/release-0.5.0-export-8447366/BIN/BUILD/mysql-server/plugin/group_replication/src/certifier.cc:209
#4 0x00007fffc8f6bb36 in Certification_handler::initialize (this=0x7fffbc0507e0)
at /export/home/pb2/build/sb_0-16452762-1441960761.59/release-0.5.0-export-8447366/BIN/BUILD/mysql-server/plugin/group_replication/src/handlers/certification_handler.cc:32
#5 0x00007fffc8f634d7 in configure_pipeline (pipeline=0x7fffbc051a80, handler_list=0x7fffbc0506f0, num_handlers=3)
at /export/home/pb2/build/sb_0-16452762-1441960761.59/release-0.5.0-export-8447366/BIN/BUILD/mysql-server/plugin/group_replication/src/pipeline_factory.cc:143
#6 0x00007fffc8f6364d in get_pipeline (pipeline_type=<value optimized out>, pipeline=0x7fffbc051a80)
at /export/home/pb2/build/sb_0-16452762-1441960761.59/release-0.5.0-export-8447366/BIN/BUILD/mysql-server/plugin/group_replication/src/pipeline_factory.cc:30
#7 0x00007fffc8f554b0 in Applier_module::setup_applier_module (this=0x7fffbc051920, pipeline_type=STANDARD_GROUP_REPLICATION_PIPELINE, reset_logs=false,
stop_timeout=31536000, group_sidno=2)
at /export/home/pb2/build/sb_0-16452762-1441960761.59/release-0.5.0-export-8447366/BIN/BUILD/mysql-server/plugin/group_replication/src/applier.cc:99
#8 0x00007fffc8f63eca in configure_and_start_applier_module ()
at /export/home/pb2/build/sb_0-16452762-1441960761.59/release-0.5.0-export-8447366/BIN/BUILD/mysql-server/plugin/group_replication/src/plugin.cc:761
#9 0x00007fffc8f657df in plugin_group_replication_start ()
at /export/home/pb2/build/sb_0-16452762-1441960761.59/release-0.5.0-export-8447366/BIN/BUILD/mysql-server/plugin/group_replication/src/plugin.cc:289
#10 0x00000000016927c9 in Group_replication_handler::start (this=0x378f2d0) at /home/full_datadir/mysql-5.7.8-rc/sql/rpl_group_replication.cc:56
#11 0x0000000001692b81 in group_replication_start () at /home/full_datadir/mysql-5.7.8-rc/sql/rpl_group_replication.cc:192
#12 0x000000000149739c in mysql_execute_command (thd=0x7fffbc007180) at /home/full_datadir/mysql-5.7.8-rc/sql/sql_parse.cc:3029
#13 0x000000000149e15b in mysql_parse (thd=0x7fffbc007180, parser_state=0x7fffc8ef14a0) at /home/full_datadir/mysql-5.7.8-rc/sql/sql_parse.cc:5255
#14 0x0000000001492dec in dispatch_command (thd=0x7fffbc007180, com_data=0x7fffc8ef1cd0, command=COM_QUERY)
at /home/full_datadir/mysql-5.7.8-rc/sql/sql_parse.cc:1272
#15 0x00000000014917f3 in do_command (thd=0x7fffbc007180) at /home/full_datadir/mysql-5.7.8-rc/sql/sql_parse.cc:852
#16 0x00000000015c9042 in handle_connection (arg=0x36c1a50) at /home/full_datadir/mysql-5.7.8-rc/sql/conn_handler/connection_handler_per_thread.cc:300
#17 0x0000000001c56c41 in pfs_spawn_thread (arg=0x37d1990) at /home/full_datadir/mysql-5.7.8-rc/storage/perfschema/pfs.cc:2178
#18 0x00007ffff7bc79d1 in start_thread () from /lib64/libpthread.so.0
#19 0x00007ffff62ccb6d in clone () from /lib64/libc.so.6
For further reading refer to related fresh BUG report -> #78627
It is really cool to help community to improve Open Source projects. So go on and test by your own, report interesting things and ofcourse contact with community members. They are all open to discussion