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  1. MariaDB Server
  2. MDEV-5195

Slave crashes in rpt_handle_event on executing check_warnings and FLUSH LOGS

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: None
        • Fix Version/s: 10.0.5
        • Component/s: None
        • Labels:
          None

          Description

          
--source include/master-slave.inc
CREATE TABLE t1 (i INT);
FLUSH LOGS;

          Executing this MTR test with slave-parallel-threads>0 several times (e.g. with repeat=10) causes a crash:

          #2  0x00000000007f2e70 in handle_fatal_signal (sig=11) at /home/elenst/bzr/10.0-knielsen/sql/signal_handler.cc:262
#3  <signal handler called>
#4  0x0000000000786b54 in rpt_handle_event (qev=0x7fc83c016940, rpt=0x3a58c58) at /home/elenst/bzr/10.0-knielsen/sql/rpl_parallel.cc:44
#5  0x000000000078721b in handle_rpl_parallel_thread (arg=0x3a58c58) at /home/elenst/bzr/10.0-knielsen/sql/rpl_parallel.cc:216
#6  0x000000000099204e in pfs_spawn_thread (arg=0x3a58e00) at /home/elenst/bzr/10.0-knielsen/storage/perfschema/pfs.cc:1015
#7  0x00007fc889deee9a in start_thread (arg=0x7fc8720c7700) at pthread_create.c:308
#8  0x00007fc8890e2cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

          revision-id: knielsen@knielsen-hq.org-20131025191714-lclqx9vuu5jrh24z
revno: 3687
branch-nick: 10.0-knielsen
BUILD/compile-pentium-debug-max-no-ndb

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                relates to

                Task - A task that needs to be done. MDEV-4506 MWL#184: Parallel replication of group-committed transactions

                • Critical - Crashes, loss of data, severe memory leak.
                • Closed

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                  Permalink
                  knielsen Kristian Nielsen added a comment -

                  I am able to repeat this

                  Show
                  knielsen Kristian Nielsen added a comment - I am able to repeat this
                  Hide
                  Permalink
                  knielsen Kristian Nielsen added a comment -

                  In parallel replication, when the IO thread switches relay log,
                  the SQL thread re-opens the current relaylog and seeks to the
                  current position. There was a race that would cause it to
                  sometimes seek to the wrong position, causing corruption and
                  crash.

                  Show
                  knielsen Kristian Nielsen added a comment - In parallel replication, when the IO thread switches relay log, the SQL thread re-opens the current relaylog and seeks to the current position. There was a race that would cause it to sometimes seek to the wrong position, causing corruption and crash.

                    People

                    • Assignee:
                      knielsen Kristian Nielsen
                      Reporter:
                      elenst Elena Stepanova
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                      Dates

                      • Created:
                        Updated:
                        Resolved: