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  1. MariaDB Server
  2. MDEV-33048

Assertion `info->end_of_file - (info->append_read_pos-info->write_buffer) == (res= inline_mysql_file_tell("/test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c", 151, info->file, (myf) (0)))' failed.

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      I first thought this was another iteration of MDEV-30176. However, this new testcase reproduces the issue only in bb-11.4-MDEV-7850 and not in the latest 11.3 (at 9e76d94ef0f3f1a8d222a23c7922f806d00777b5) nor in the latest 11.4 (at 9bd95e914f3f12d0d9d93e7a1f2c49e6e8841f17).

      SET SESSION collation_connection=utf32_sinhala_ci;
      SET default_master_connection='my_slave';
      CHANGE MASTER TO master_use_gtid=current_pos;
      SET SESSION default_master_connection='@!*/"';
      CHANGE MASTER TO master_use_gtid=current_pos;
      FLUSH RELAY LOGS;
      SHUTDOWN;
      

      Leads to:

      bb-11.4-MDEV-7850 57618265ad914824ce78108729829df13c75e224 (Debug)

      mariadbd: /test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c:150: my_b_append_tell: Assertion `info->end_of_file - (info->append_read_pos-info->write_buffer) == (res= inline_mysql_file_tell("/test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c", 151, info->file, (myf) (0)))' failed.
      

      bb-11.4-MDEV-7850 57618265ad914824ce78108729829df13c75e224 (Debug)

      Core was generated by `/test/MDEV-7850_MD161223-mariadb-11.4.0-linux-x86_64-dbg/bin/mariadbd --no-defa'.
      Program terminated with signal SIGABRT, Aborted.
      #0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=22999004778496)
          at ./nptl/pthread_kill.c:44
      [Current thread is 1 (Thread 0x14eadf829000 (LWP 2043653))]
      (gdb) bt
      #0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=22999004778496) at ./nptl/pthread_kill.c:44
      #1  __pthread_kill_internal (signo=6, threadid=22999004778496) at ./nptl/pthread_kill.c:78
      #2  __GI___pthread_kill (threadid=22999004778496, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
      #3  0x000014eadf642476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
      #4  0x000014eadf6287f3 in __GI_abort () at ./stdlib/abort.c:79
      #5  0x000014eadf62871b in __assert_fail_base (fmt=0x14eadf7dd130 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x55cddfa952e8 "info->end_of_file - (info->append_read_pos-info->write_buffer) == (res= inline_mysql_file_tell(\"/test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c\", 151, info->file, (myf) (0)))", file=0x55cddfa95248 "/test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c", line=150, function=<optimized out>) at ./assert/assert.c:92
      #6  0x000014eadf639e96 in __GI___assert_fail (assertion=assertion@entry=0x55cddfa952e8 "info->end_of_file - (info->append_read_pos-info->write_buffer) == (res= inline_mysql_file_tell(\"/test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c\", 151, info->file, (myf) (0)))", file=file@entry=0x55cddfa95248 "/test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c", line=line@entry=150, function=function@entry=0x55cddfa95460 <__PRETTY_FUNCTION__.1> "my_b_append_tell") at ./assert/assert.c:101
      #7  0x000055cddf5dcfab in my_b_append_tell (info=0x14ea2c0399d8) at /test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c:150
      #8  0x000055cddf5dd051 in my_b_safe_tell (info=<optimized out>) at /test/bb-11.4-MDEV-7850_dbg/mysys/mf_iocache2.c:163
      #9  0x000055cddf03d6a7 in Log_event_writer::pos (this=0x7ffe386ebcd0) at /test/bb-11.4-MDEV-7850_dbg/sql/log_event.h:1007
      #10 Log_event::write_header (this=this@entry=0x7ffe386ebd60, writer=writer@entry=0x7ffe386ebcd0, event_data_length=<optimized out>) at /test/bb-11.4-MDEV-7850_dbg/sql/log_event_server.cc:863
      #11 0x000055cddf033467 in Log_event::write (this=0x7ffe386ebd60, writer=0x7ffe386ebcd0) at /test/bb-11.4-MDEV-7850_dbg/sql/log_event.h:1481
      #12 0x000055cddf00cd7e in Log_event_writer::write (ev=0x7ffe386ebd60, this=0x7ffe386ebcd0) at /test/bb-11.4-MDEV-7850_dbg/sql/log_event.h:5431
      #13 Event_log::write_event (this=this@entry=0x14ea2c039640, ev=ev@entry=0x7ffe386ebd60, checksum_alg=checksum_alg@entry=BINLOG_CHECKSUM_ALG_CRC32, cache_data=cache_data@entry=0x0, file=file@entry=0x14ea2c0399d8) at /test/bb-11.4-MDEV-7850_dbg/sql/log.cc:5840
      #14 0x000055cddf0168b2 in MYSQL_BIN_LOG::write_event (checksum_alg=BINLOG_CHECKSUM_ALG_CRC32, ev=0x7ffe386ebd60, this=0x14ea2c039638) at /test/bb-11.4-MDEV-7850_dbg/sql/log.h:1000
      #15 MYSQL_BIN_LOG::close (this=this@entry=0x14ea2c039638, exiting=exiting@entry=5) at /test/bb-11.4-MDEV-7850_dbg/sql/log.cc:9486
      #16 0x000055cddeaf7601 in end_relay_log_info (rli=rli@entry=0x14ea2c039110) at /test/bb-11.4-MDEV-7850_dbg/sql/slave.cc:7028
      #17 0x000055cdded21bcf in free_key_master_info (mi=0x14ea2c037050) at /test/bb-11.4-MDEV-7850_dbg/sql/rpl_mi.cc:894
      #18 0x000055cddf5d77be in my_hash_free_elements (hash=0x55cde2e3b740) at /test/bb-11.4-MDEV-7850_dbg/mysys/hash.c:135
      #19 my_hash_reset (hash=0x55cde2e3b740) at /test/bb-11.4-MDEV-7850_dbg/mysys/hash.c:178
      #20 0x000055cdded2211e in Master_info_index::free_connections (this=0x55cde2e3b3d0) at /test/bb-11.4-MDEV-7850_dbg/sql/rpl_mi.cc:1068
      #21 0x000055cddeaedcca in slave_prepare_for_shutdown () at /test/bb-11.4-MDEV-7850_dbg/sql/slave.cc:1298
      #22 0x000055cddeaa365b in close_connections () at /test/bb-11.4-MDEV-7850_dbg/sql/mysqld.cc:1801
      #23 mysqld_main (argc=<optimized out>, argv=<optimized out>) at /test/bb-11.4-MDEV-7850_dbg/sql/mysqld.cc:6068
      #24 0x000055cddea94c76 in main (argc=<optimized out>, argv=<optimized out>) at /test/bb-11.4-MDEV-7850_dbg/sql/main.cc:34
      

      No special mysqld options required, inc. binary logging. Apparently not sporadic. Debug builds only.

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              bnestere Brandon Nesterenko
              Roel Roel Van de Paar
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