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- A prerequisite cleanup patch for making KILL reliable. The test case main.kill did not work reliably. The following problems have been identified: 1. A kill signal could go lost if it came in, short before a thread went reading on the client connection. 2. A kill signal could go lost if it came in, short before a thread went waiting on a condition variable. These problems have been solved as follows. Please see also added code comments for more details. 1. There is no safe way to detect, when a thread enters the blocking state of a read(2) or recv(2) system call, where it can be interrupted by a signal. Hence it is not possible to wait for the right moment to send a kill signal. It has been decided, not to fix it in the code. Instead, the test case repeats the KILL statement until the connection terminates. 2. Before waiting on a condition variable, we register it together with a synchronizating mutex in THD::mysys_var. After this, we need to test THD::killed again. At some places we did only test it in a loop condition before the registration. When THD::killed had been set between this test and the registration, we entered waiting without noticing the killed flag. Additional checks ahve been introduced where required. In addition to the above, a re-write of the main.kill test case has been done. All sleeps have been replaced by Debug Sync Facility synchronization. A couple of sync points have been added to the server code. To avoid further problems, if the test case fails in spite of the fixes, the test case has been added to the "experimental" list for now. - Most of the work on this patch is authored by Ingo Struewing
18 lines
885 B
Modula-2
18 lines
885 B
Modula-2
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# <testcasename> : BUG#<xxxx> <date disabled> <disabler> <comment>
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lowercase_table3 : Bug#54845 2010-06-30 alik main.lowercase_table3 on Mac OSX
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mysqlhotcopy_myisam : Bug#54129 2010-08-31 alik mysqlhotcopy* fails
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mysqlhotcopy_archive : Bug#54129 2010-08-31 alik mysqlhotcopy* fails
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query_cache_28249 : Bug#43861 2009-03-25 main.query_cache_28249 fails sporadically
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sp_sync : Bug#48157 2010-02-06 5.5-m3 demands a differnt solution
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ctype_utf8mb4_ndb : Bug#55799, Bug#51907, disabled by Konstantin 2010-08-06
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