1. 12 Feb, 2008 2 commits
  2. 11 Feb, 2008 1 commit
  3. 08 Feb, 2008 1 commit
    • aelkin/andrei@mysql1000.dsl.inet.fi's avatar
      bug#34427 slave misses rendezvous in rpl_variables · f01531b7
      aelkin/andrei@mysql1000.dsl.inet.fi authored
      There was no instruction in the test that enforces the slave successfully connect
      to the master.
      The way the test was been written allowed the slave to had been late for rendezvous 
      so that about-connecting time queries to the master failed and are error-logged
      to had been seen in Warnings of pb.
      
      Fixed with adding a sychronization primitive to the test.
      No test case is possible, observe error logs on pb.
      
      Todo: revise need of rpl_report.pl's rules due to failing execution of
      queries from get_master_verion_and_clock().
      Any test should try to use a synchornization primitive like the current fix
      makes and do not let the slave to miss successful connecting.
      f01531b7
  4. 06 Feb, 2008 1 commit
  5. 05 Feb, 2008 1 commit
    • aelkin/elkin@koti.dsl.inet.fi's avatar
      Bug #34305 show slave status handling segfaults when slave io is about · 51b33ea3
      aelkin/elkin@koti.dsl.inet.fi authored
          to leave
      
      The artifact was caused by
      a flaw in concurrent accessing the slave's io thd by
      the io itself and a handling show slave status thread.
      Namely, show_master_info did not acquire mi->run_lock mutex that is
      specified for mi->io_thd member.
      
      Fixed with deploying the mutex locking and unlocking. The mutex is kept
      short time and without interleaving with mi->data_lock mutex.
      
      Todo: to report and fix an issue with 
          sys_var_slave_skip_counter::{methods} 
      seem to acquire incorrectly
           active_mi->rli.run_lock
      instead of the specified
           active_mi->rli.data_lock
      
      A test case is difficult to compose, so rpl_packet should continue serving
      as the indicator.
      51b33ea3
  6. 04 Feb, 2008 4 commits
  7. 01 Feb, 2008 6 commits
  8. 31 Jan, 2008 3 commits
  9. 30 Jan, 2008 4 commits
  10. 29 Jan, 2008 2 commits
    • hezx@mail.hezx.com's avatar
      update test result · 7572a9e3
      hezx@mail.hezx.com authored
      7572a9e3
    • hezx@mail.hezx.com's avatar
      BUG#26489 Corruption in relay logs · e4f37eab
      hezx@mail.hezx.com authored
      Here is the scenario that causes the failure.(by Mats)
      
      1. The to-be corrupt log event (let's call it X), is split into two
         packets B and C on the network level (net_write_buff()). The parts
         are X = (x',x''). The part x' ends up in packet B and part x''
         ends up in packet C. Prior to the corrupt event X, the event Y has
         been written successfully, but has been split into two packets as
         well, which we call (y',y'').
      2. The master sends packet A = (y'',x') to the slave, increases the
         packet sequence number, the slave receives the packet, but fails
         to reply before the master gets a timeout.
      3. Since the master got a timeout, it reports failure, and aborts
         sending the binary log by exiting mysql_binlog_send(). However, it
         leaves the buffer intact, still holding y'' (but not x', since the
         write_pos is not increased).
      4. After exiting mysql_binlog_send(), the master does a
         disconnection of the client thread, which involves sending an
         error message e to the client (i.e., the slave).
      5. In this case, net_write_buff() is used again, but this time the
         old contents of the packet is used so that the new packet is
         D = (y'',e). Note that this will use a new packet sequence number,
         since the packet number was increased in step 2.
      6. The slave receives the tail y'' of the Y log event, concatenates
         this with x' (which it already received), and writes the event
         (x',y'') it to the relay log since it hasn't noticed anything is
         amiss.
      7. It then tries to read more bytes, which is either e (if the length
         given for X just happened to match the length given for Y, or just
         plain garbage because the slave is out of sync with what is
         actually sent.
      8. After a while, the SQL thread tries to execute the event (x',y''),
         which is very likely to be just nonsense.
      
      The problem can be fixed by not resetting net->error after the call of 
      mysql_binlog_send, so the error message will not be sent and the connection
      will be closed.
      e4f37eab
  11. 27 Jan, 2008 1 commit
  12. 25 Jan, 2008 3 commits
  13. 24 Jan, 2008 1 commit
  14. 23 Jan, 2008 7 commits
  15. 22 Jan, 2008 3 commits