maxscale crash with signal 11

MariaDB MaxScale  /var/log/maxscale/maxscale.log  Mon Dec 10 09:04:16 2018

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2018-12-10 09:04:16   notice : syslog logging is enabled.

2018-12-10 09:04:16   notice : maxlog logging is enabled.

2018-12-10 09:04:16   notice : Using up to 5.91GiB of memory for query classifier cache

2018-12-10 09:04:16   notice : Working directory: /var/log/maxscale

2018-12-10 09:04:16   notice : The collection of SQLite memory allocation statistics turned off.

2018-12-10 09:04:16   notice : Threading mode of SQLite set to Multi-thread.

2018-12-10 09:04:16   notice : MariaDB MaxScale 2.3.2 started (Commit: 1126c687a4570f60ee26a163520198a3263ccbbd)

2018-12-10 09:04:16   notice : MaxScale is running in process 5649

2018-12-10 09:04:16   notice : Configuration file: /etc/maxscale.cnf

2018-12-10 09:04:16   notice : Log directory: /var/log/maxscale

2018-12-10 09:04:16   notice : Data directory: /var/lib/maxscale

2018-12-10 09:04:16   notice : Module directory: /usr/lib64/maxscale

2018-12-10 09:04:16   notice : Service cache: /var/cache/maxscale

2018-12-10 09:04:16   notice : No query classifier specified, using default 'qc_sqlite'.

2018-12-10 09:04:16   notice : Loaded module qc_sqlite: V1.0.0 from /usr/lib64/maxscale/libqc_sqlite.so

2018-12-10 09:04:16   notice : Query classification results are cached and reused. Memory used per thread: 2.95GiB

2018-12-10 09:04:16   notice : The systemd watchdog is Enabled. Internal timeout = 30s

2018-12-10 09:04:16   notice : Loading /etc/maxscale.cnf.

2018-12-10 09:04:16   notice : Loaded module MariaDBBackend: V2.0.0 from /usr/lib64/maxscale/libmariadbbackend.so

2018-12-10 09:04:16   notice : Loaded module MariaDBClient: V1.1.0 from /usr/lib64/maxscale/libmariadbclient.so

2018-12-10 09:04:16   notice : Initializing statement-based read/write split router module.

2018-12-10 09:04:16   notice : Loaded module readwritesplit: V1.1.0 from /usr/lib64/maxscale/libreadwritesplit.so

2018-12-10 09:04:16   notice : Initialise the MariaDB Monitor module.

2018-12-10 09:04:16   notice : Loaded module mariadbmon: V1.5.0 from /usr/lib64/maxscale/libmariadbmon.so

2018-12-10 09:04:16   notice : Loaded module MySQLBackendAuth: V1.0.0 from /usr/lib64/maxscale/libmysqlbackendauth.so

2018-12-10 09:04:16   notice : Loaded module MySQLAuth: V1.1.0 from /usr/lib64/maxscale/libmysqlauth.so

2018-12-10 09:04:16   notice : Housekeeper thread started.

2018-12-10 09:04:16   notice : Using encrypted passwords. Encryption key: '/var/lib/maxscale/.secrets'.

2018-12-10 09:04:16   notice : Loaded server states from journal file: /var/lib/maxscale/DatabaseMonitor/monitor.dat

2018-12-10 09:04:16   notice : Starting a total of 1 services...

2018-12-10 09:04:16   notice : [SplitterService] Loaded 67 MySQL users for listener SplitterListener.

2018-12-10 09:04:16   notice : Listening for connections at [::]:3306 with protocol MySQL

2018-12-10 09:04:16   notice : Service 'SplitterService' started (1/1)

2018-12-10 09:04:16   notice : Started REST API on [127.0.0.1]:8989

2018-12-10 09:04:16   notice : MaxScale started with 2 worker threads, each with a stack size of 8388608 bytes.

2018-12-10 09:04:55   alert  : Fatal: MaxScale 2.3.2 received fatal signal 11. Attempting backtrace.

2018-12-10 09:04:55   alert  : Commit ID: 1126c687a4570f60ee26a163520198a3263ccbbd System name: Linux Release string: NAME="CentOS Linux"

2018-12-10 09:04:55   alert  :   /usr/bin/maxscale(_ZN7maxbase15dump_stacktraceESt8functionIFvPKcS2_EE+0x2b) [0x40cbeb]: /home/vagrant/MaxScale/maxutils/maxbase/src/stacktrace.cc:130

2018-12-10 09:04:55   alert  :   /usr/bin/maxscale(_ZN7maxbase15dump_stacktraceEPFvPKcS1_E+0x4e) [0x40cf4e]: /usr/include/c++/4.8.2/functional:2029

2018-12-10 09:04:55   alert  :   /usr/bin/maxscale() [0x4095c9]: ??:0

2018-12-10 09:04:55   alert  :   /lib64/libpthread.so.0(+0xf6d0) [0x7f922de0a6d0]: sigaction.c:?

2018-12-10 09:04:55   alert  :   /usr/lib64/maxscale/libmysqlcommon.so.2.0.0(mysql_protocol_done+0x12) [0x7f9226d17c72]: /home/vagrant/MaxScale/server/modules/protocol/MySQL/mysql_common.cc:79

2018-12-10 09:04:55   alert  :   /usr/lib64/maxscale/libmariadbclient.so(+0x3371) [0x7f9226b0a371]: /home/vagrant/MaxScale/server/modules/protocol/MySQL/mariadbclient/mysql_client.cc:1497

2018-12-10 09:04:55   alert  :   /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(dcb_final_close+0x488) [0x7f922e535e08]: /home/vagrant/MaxScale/server/core/dcb.cc:1237

2018-12-10 09:04:55   alert  :   /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale13RoutingWorker14delete_zombiesEv+0x34) [0x7f922e56e7a4]: /usr/include/c++/4.8.2/bits/stl_vector.h:734

2018-12-10 09:04:55   alert  :   /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale13RoutingWorker10epoll_tickEv+0x26) [0x7f922e56f016]: /home/vagrant/MaxScale/server/core/routingworker.cc:641

2018-12-10 09:04:55   alert  :   /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN7maxbase6Worker15poll_waiteventsEv+0x326) [0x7f922e590676]: /home/vagrant/MaxScale/maxutils/maxbase/src/worker.cc:762

2018-12-10 09:04:55   alert  :   /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN7maxbase6Worker3runEPNS_9SemaphoreE+0x51) [0x7f922e590701]: /home/vagrant/MaxScale/maxutils/maxbase/src/worker.cc:545

2018-12-10 09:04:55   alert  :   /usr/bin/maxscale(main+0x2019) [0x4087f9]: /home/vagrant/MaxScale/server/core/gateway.cc:2260

2018-12-10 09:04:55   alert  :   /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f922bd07445]: ??:?

2018-12-10 09:04:55   alert  :   /usr/bin/maxscale() [0x409022]: ??:0

[maxscale]

threads=auto

[DatabaseMonitor]

type=monitor

servers=mariadb1,mariadb2,mariadb3

user=maxscale

password=redacted

monitor_interval=100

detect_standalone_master=true

module=mariadbmon

replication_user=repli

replication_password=redacted

journal_max_age=28800

script_timeout=90

[SplitterService]

type=service

router=readwritesplit

servers=mariadb1,mariadb2,mariadb3

user=maxscale

password=redacted

use_sql_variables_in=master

#detect_replication_lag=1

#max_slave_replication_lag=1

[SplitterListener]

type=listener

service=SplitterService

protocol=MariaDBClient

port=3306

[mariadb1]

type=server

address=mariadb-prod-1.customer.com

port=3306

protocol=MariaDBBackend

[mariadb2]

type=server

address=mariadb-prod-2.customer.com

port=3306

protocol=MariaDBBackend

[mariadb3]

type=server

address=mariadb-prod-3.customer.com

port=3306

protocol=MariaDBBackend