[MXS-270] Crash with MySQLBackend protocol module - Jira

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MaxScale crashes with the following configuration soon after startup.

[Galera Service]

type=service

router=readwritesplit

servers=server1,server2,server3

max_slave_connections=90%

user=maxuser

passwd=

enable_root_user=0

Stack trace from the crash.

2015-07-07 07:57:00   Fatal: MaxScale received fatal signal 11. Attempting backtrace.

2015-07-07 07:57:00     /usr/local/mariadb-maxscale/bin/maxscale() [0x542a98]

2015-07-07 07:57:00     /lib64/libpthread.so.0(+0xf130) [0x7f105782f130]

2015-07-07 07:57:00     /usr/local/mariadb-maxscale/modules/libMySQLBackend.so(+0x514b) [0x7f1038a1614b]

2015-07-07 07:57:00     /usr/local/mariadb-maxscale/modules/libMySQLBackend.so(+0x318f) [0x7f1038a1418f]

2015-07-07 07:57:00     /usr/local/mariadb-maxscale/bin/maxscale() [0x554a92]

2015-07-07 07:57:00     /usr/local/mariadb-maxscale/bin/maxscale(poll_waitevents+0x616) [0x55435b]

2015-07-07 07:57:00     /usr/local/mariadb-maxscale/bin/maxscale(main+0x1a10) [0x545563]

2015-07-07 07:57:00     /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f1056021af5]

2015-07-07 07:57:00     /usr/local/mariadb-maxscale/bin/maxscale() [0x5418dd]

is duplicated by

MXS-314 Read Write Split Error with Galera Nodes

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