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Try to fix PHP/hhvm tests by working around an issue with SET NAMES (T…
…echEmpower#3220) I think we are running into this problem: facebook/hhvm#8111 We don't solve that problem, but we avoid it by specifying utf8 in a different fashion. I also took the opportunity to use the "TFB-database" hostname instead of the DBHOST environment variable because it's simpler that way. Here are the steps I took in a local TFB environment that make me think we're running into the same issue as that GitHub issue: - Run toolset/run-tests.py --mode verify --test hvm, see that it fails all tests with error messages that look like the application server simply isn't there - Enable logging in PHP/hhvm/deploy/config.hdf (basically copy the "Log" section over from config-debug.hdf), run the test again - Look at the log file it spit out, PHP/hhvm/error.log, notice messages like this: Core dumped: Segmentation fault Stack trace in /tmp/stacktrace.28653.log - /tmp is cleared by the TFB toolset each run, so I comment out that part of benchmarker.py that clears /tmp - Run the test again, look at the stacktrace file in /tmp, notice a stack trace referring to our implementation code like this: #0 PDO->__construct() called at [/home/techempower/FrameworkBenchmarks/frameworks/PHP/hhvm/once.php.inc:14] #1 Benchmark->setup_db() called at [/home/techempower/FrameworkBenchmarks/frameworks/PHP/hhvm/once.php.inc:31] #2 Benchmark->bench_db() called at [/home/techempower/FrameworkBenchmarks/frameworks/PHP/hhvm/db.php:10] #3 main() called at [/home/techempower/FrameworkBenchmarks/frameworks/PHP/hhvm/db.php:13] - Google a bit, come across a GitHub issue talking about a similar problem when they used "SET NAMES" - Comment the part of PHP/hhvm/once.php.inc that uses SET NAMES, run test again and it worked, except for fortunes which failed because of character encoding problems - Google for a different way to specify utf8 in the PDO constructor, try it again, all tests pass locally
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