DOC HOME SITE MAP MAN PAGES GNU INFO SEARCH PRINT BOOK
 

(mysql.info) replication-bugs

Info Catalog (mysql.info) replication-problems (mysql.info) replication (mysql.info) replication-auto-increment
 
 6.12 How to Report Replication Bugs or Problems
 ===============================================
 
 When you have determined that there is no user error involved, and
 replication still either does not work at all or is unstable, it is
 time to send us a bug report. We need to obtain as much information as
 possible from you to be able to track down the bug.  Please spend some
 time and effort in preparing a good bug report.
 
 If you have a repeatable test case that demonstrates the bug, please
 enter it into our bugs database using the instructions given in 
 bug-reports. If you have a `phantom' problem (one that you cannot
 duplicate at will), use the following procedure:
 
   1. Verify that no user error is involved. For example, if you update
      the slave outside of the slave thread, the data goes out of
      synchrony, and you can have unique key violations on updates. In
      this case, the slave thread stops and waits for you to clean up
      the tables manually to bring them into synchrony. _This is not a
      replication problem. It is a problem of outside interference
      causing replication to fail._
 
   2. Run the slave with the -log-slave-updates and -log-bin options.
      These options cause the slave to log the updates that it receives
      from the master into its own binary logs.
 
   3. Save all evidence before resetting the replication state. If we
      have no information or only sketchy information, it becomes
      difficult or impossible for us to track down the problem. The
      evidence you should collect is:
 
         * All binary logs from the master
 
         * All binary logs from the slave
 
         * The output of `SHOW MASTER STATUS' from the master at the
           time you discovered the problem
 
         * The output of `SHOW SLAVE STATUS' from the slave at the time
           you discovered the problem
 
         * Error logs from the master and the slave
 
   4. Use `mysqlbinlog' to examine the binary logs.  The following
      should be helpful to find the problem statement.  LOG_POS and
      LOG_FILE are the `Master_Log_File' and `Read_Master_Log_Pos'
      values from `SHOW SLAVE STATUS'.
 
           shell> mysqlbinlog -j LOG_POS LOG_FILE | head
 
 After you have collected the evidence for the problem, try to isolate
 it as a separate test case first. Then enter the problem with as much
 information as possible into our bugs database using the instructions
 at  bug-reports.
 
Info Catalog (mysql.info) replication-problems (mysql.info) replication (mysql.info) replication-auto-increment
automatically generated byinfo2html