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  1. MariaDB Server
  2. MDEV-32944

Rpl_semi_sync_slave_enabled sysvar Should Not Be Modifiable While IO Thread is Running

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      With the MDEV-32551 fixes, changing rpl_semi_sync_slave_enabled has no immediate effect if the IO thread is running, and will take effect only after restarting the slave. This seems confusing for users; and I think this system variable should only be allowed to be set if the IO thread isn't running, and report an error otherwise (e.g. as similarly done by the slave_parallel_threads variable in sys_vars.cc)

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          is caused by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-32551 "Read semi-sync reply magic number error" warnings on master

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-32947 Semi-sync with Multi-source Checksum Verification Failure

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

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              monty Michael Widenius
              bnestere Brandon Nesterenko
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