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# Copyright (C) 2008-2009 Sun Microsystems, Inc. All rights reserved.
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# Use is subject to license terms.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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package GenTest::Reporter::LockTableKiller;
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@ISA = qw(GenTest::Reporter);
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use GenTest::Constants;
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use GenTest::Reporter;
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use constant PROCESSLIST_CONNECTION_ID => 0;
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use constant PROCESSLIST_PROCESS_TIME => 5;
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use constant PROCESSLIST_PROCESS_STATE => 6;
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use constant PROCESSLIST_PROCESS_INFO => 7;
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# Minimum lifetime of a LOCK TABLE before it is considered suspicious
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use constant LOCK_LIFETIME_THRESHOLD => 10; # Seconds
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my $dsn = $reporter->dsn();
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my $dbh = DBI->connect($dsn);
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if (defined GenTest::Executor::MySQL::errorType($DBI::err)) {
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return GenTest::Executor::MySQL::errorType($DBI::err);
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} elsif (not defined $dbh) {
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return STATUS_UNKNOWN_ERROR;
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my $processlist = $dbh->selectall_arrayref("SHOW FULL PROCESSLIST");
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foreach my $process (@$processlist) {
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($process->[PROCESSLIST_PROCESS_INFO] =~ m{LOCK\s+TABLE}sio) &&
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($process->[PROCESSLIST_PROCESS_TIME] > LOCK_LIFETIME_THRESHOLD) &&
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($process->[PROCESSLIST_PROCESS_STATE] eq 'Table lock')
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say("Stalled LOCK TABLE: ".$process->[PROCESSLIST_PROCESS_INFO].". Killing query.");
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$dbh->do("KILL QUERY ".$process->[PROCESSLIST_CONNECTION_ID]);
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return REPORTER_TYPE_PERIODIC;