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  1. MariaDB Server
  2. MDEV-23378

Memory leak in sys_vars.thread_pool_size_high

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      I think that I have seen this error in http://buildbot.askmonty.org but for some reason, my attempts to find it in the cross-reference were unsuccessful. Here is a 10.2 failure on Travis CI:

      10.2 dc716da4571465af3adadcd2c471f11fef3a2191

      Warnings generated in error logs during shutdown after running tests: sys_vars.thread_pool_size_high
       
      Warning: Memory not freed: 38408
      The servers were restarted 364 times
      Spent 1232.291 of 389 seconds executing testcases
      Completed: All 1963 tests were successful.
      Errors/warnings were found in logfiles during server shutdown after running the
      following sequence(s) of tests:
          sys_vars.thread_pool_size_high
      270 tests were skipped, 67 by the test itself.
      mysql-test-run: *** ERROR: There where errors/warnings in server logs after running test cases.
      

      Apparently, such errors are kind of ignored on buildbot, because cross-reference will not find them. I did not find any references to "Memory not freed" for the branches 10.2, 10.3, 10.4, 10.5, but I did see them in some staging branches, probably for tests that restart the server themselves. If the server is being restarted between tests, shutdown warning messages could be ignored.

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              wlad Vladislav Vaintroub
              marko Marko Mäkelä
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