2016-10-03 15:45:55 140365520271616 [ERROR] Plugin 'tokudb' already installed
2016-10-03 15:45:55 140365520271616 [ERROR] Can't find symbol 'tokudb_user_data' in library
2016-10-03 15:45:55 140365520271616 [ERROR] Can't find symbol 'tokudb_user_data_exact' in library
2016-10-03 15:45:55 140365520271616 [ERROR] Plugin 'tokudb_file_map' already installed
2016-10-03 15:45:55 140365520271616 [ERROR] Plugin 'tokudb_fractal_tree_info' already installed
2016-10-03 15:45:55 140365520271616 [ERROR] Plugin 'tokudb_fractal_tree_block_map' already installed
/home/buildbot/buildbot/build/mariadb-10.1.18/storage/tokudb/PerconaFT/ft/logger/logfilemgr.cc:120 toku_logfilemgr_init: Assertion `lf_info->maxlsn.lsn >= tmp_lsn.lsn' failed (errno=2)
: No such file or directory
Backtrace: (Note: toku_do_assert=0x0x7fa91ad88380)
/usr/lib/mysql/plugin/ha_tokudb.so(_Z19db_env_do_backtraceP8_IO_FILE+0x2e)[0x7fa91ad87bfe]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x124d33)[0x7fa91ad87d33]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x1250de)[0x7fa91ad880de]
/usr/lib/mysql/plugin/ha_tokudb.so(_Z20toku_logfilemgr_initP15toku_logfilemgrPKcPm+0x287)[0x7fa91ad3ce57]
/usr/lib/mysql/plugin/ha_tokudb.so(_Z30toku_logger_open_with_last_xidPKcP10tokuloggerm+0x41)[0x7fa91ad294a1]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x9bf7f)[0x7fa91acfef7f]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x594bd)[0x7fa91acbc4bd]
/usr/sbin/mysqld(_Z24ha_initialize_handlertonP13st_plugin_int+0x64)[0x5651096ed5b4]
/usr/sbin/mysqld(+0x41b3b8)[0x5651095713b8]
/usr/sbin/mysqld(_Z11plugin_initPiPPci+0x7fa)[0x565109571d6a]
/usr/sbin/mysqld(+0x374f10)[0x5651094caf10]
/usr/sbin/mysqld(_Z11mysqld_mainiPPc+0x9bf)[0x5651094cf1af]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fa962bf5830]
/usr/sbin/mysqld(_start+0x29)[0x5651094c2cb9]
Engine status function not available
Memory usage:
Arena 0:
system bytes     =          0
in use bytes     =          0
Total (incl. mmap):
system bytes     =          0
in use bytes     =          0
max mmap regions =          0
max mmap bytes   =          0
161003 15:45:55 [ERROR] mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.

Server version: 10.1.18-MariaDB-1~xenial
key_buffer_size=4294967296
read_buffer_size=67108864
max_used_connections=0
max_threads=52
thread_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 34866199 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x0 thread_stack 0x48400
/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x565109b9c62e]
/usr/sbin/mysqld(handle_fatal_signal+0x2d5)[0x5651096eb3d5]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x113d0)[0x7fa96363a3d0]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fa962c0a418]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fa962c0c01a]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x124d38)[0x7fa91ad87d38]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x1250de)[0x7fa91ad880de]
/usr/lib/mysql/plugin/ha_tokudb.so(_Z20toku_logfilemgr_initP15toku_logfilemgrPKcPm+0x287)[0x7fa91ad3ce57]
/usr/lib/mysql/plugin/ha_tokudb.so(_Z30toku_logger_open_with_last_xidPKcP10tokuloggerm+0x41)[0x7fa91ad294a1]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x9bf7f)[0x7fa91acfef7f]
/usr/lib/mysql/plugin/ha_tokudb.so(+0x594bd)[0x7fa91acbc4bd]
/usr/sbin/mysqld(_Z24ha_initialize_handlertonP13st_plugin_int+0x64)[0x5651096ed5b4]
/usr/sbin/mysqld(+0x41b3b8)[0x5651095713b8]
/usr/sbin/mysqld(_Z11plugin_initPiPPci+0x7fa)[0x565109571d6a]
/usr/sbin/mysqld(+0x374f10)[0x5651094caf10]
/usr/sbin/mysqld(_Z11mysqld_mainiPPc+0x9bf)[0x5651094cf1af]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fa962bf5830]
/usr/sbin/mysqld(_start+0x29)[0x5651094c2cb9]
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.