fatal signal 11

MaxScale crash with this error:
2018-06-11 15:47:38 alert : Fatal: MaxScale 2.2.9 received fatal signal 11. Attempting backtrace.
2018-06-11 15:47:38 alert : Commit ID: dfd898e2cccae1fb57c404360c349dfb2dd7612d System name: Linux Release string: NAME="CentOS Linux"
2018-06-11 15:47:38 alert : /usr/bin/maxscale() [0x407921]: ??:0
2018-06-11 15:47:38 alert : /lib64/libpthread.so.0(+0xf6d0) [0x7f9e8e8756d0]: sigaction.c:?
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_Z17session_json_dataPK7sessionPKc+0x2f7) [0x7f9e8ed80f87]: /home/ec2-user/MaxScale/server/core/session.cc:1016 (discriminator 1)
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_Z10seslist_cbP3dcbPv+0x24) [0x7f9e8ed81654]: /home/ec2-user/MaxScale/server/core/session.cc:1086
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN13SerialDcbTask7executeERN8maxscale6WorkerE+0x42) [0x7f9e8ed4e742]: /home/ec2-user/MaxScale/server/core/dcb.cc:2912
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale6Worker4postEPNS_10WorkerTaskEPNS_9SemaphoreENS0_14execute_mode_tE+0x51) [0x7f9e8ed88191]: /home/ec2-user/MaxScale/server/core/worker.cc:594
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale6Worker16execute_seriallyERNS_10WorkerTaskE+0x48) [0x7f9e8ed882d8]: /home/ec2-user/MaxScale/server/core/worker.cc:695
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(dcb_foreach+0x34) [0x7f9e8ed4b744]: /home/ec2-user/MaxScale/server/core/dcb.cc:2922
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(session_list_to_json+0x25) [0x7f9e8ed80415]: /home/ec2-user/MaxScale/server/core/session.cc:1096
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(+0x76790) [0x7f9e8ed6a790]: /home/ec2-user/MaxScale/server/core/resource.cc:522
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZNK8Resource4callERK11HttpRequest+0xc) [0x7f9e8ed6e7fc]: /home/ec2-user/MaxScale/server/core/resource.cc:97
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(+0x7fb49) [0x7f9e8ed73b49]: /home/ec2-user/MaxScale/server/core/resource.cc:1117 (discriminator 1)
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(+0x815e8) [0x7f9e8ed755e8]: /home/ec2-user/MaxScale/server/core/resource.cc:1159
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale6Worker14handle_messageERNS_12MessageQueueERKNS_19MessageQueueMessageE+0x8b) [0x7f9e8ed8759b]: /home/ec2-user/MaxScale/server/core/worker.cc:1077
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale12MessageQueue18handle_poll_eventsEij+0x117) [0x7f9e8ed5bfe7]: /home/ec2-user/MaxScale/server/core/messagequeue.cc:242
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale6Worker15poll_waiteventsEv+0x1c1) [0x7f9e8ed890d1]: /home/ec2-user/MaxScale/server/core/worker.cc:1207
2018-06-11 15:47:38 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN8maxscale6Worker3runEv+0x72) [0x7f9e8ed89342]: /home/ec2-user/MaxScale/include/maxscale/log_manager.h:116
2018-06-11 15:47:38 alert : /usr/bin/maxscale(main+0x2437) [0x406727]: /home/ec2-user/MaxScale/server/core/gateway.cc:2254
2018-06-11 15:47:38 alert : /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f9e8c772445]: ??:?
2018-06-11 15:47:38 alert : /usr/bin/maxscale() [0x406945]: ??:0