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# Copyright (C) 2008-2009 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA
package GenTest::Reporter::DrizzleRecovery;
require Exporter;
@ISA = qw(GenTest::Reporter);
use strict;
use DBI;
use GenTest;
use GenTest::Constants;
use GenTest::Reporter;
use GenTest::Comparator;
use Data::Dumper;
use IPC::Open2;
use IPC::Open3;
my $first_reporter;
sub monitor {
my $reporter = shift;
# In case of two servers, we will be called twice.
# Only kill the first server and ignore the second call.
$first_reporter = $reporter if not defined $first_reporter;
return STATUS_OK if $reporter ne $first_reporter;
my $dbh = DBI->connect($reporter->dsn(), undef, undef, {PrintError => 0});
if (time() > $reporter->testEnd() - 19)
{
say("Sending shutdown() call to server in order to force a recovery.");
$dbh->selectrow_array('SELECT shutdown()');
return STATUS_SERVER_KILLED;
}
else
{
return STATUS_OK;
}
}
sub report {
my $reporter = shift;
#
# If there is a hang during recovery in one engine, another engine may continue to print
# periodic diagnostic output forever. This prevents PB2 timeout mechanisms from kicking in
# In order to avoid that, we set our own crude alarm as a stop-gap measure
#
alarm(3600);
$first_reporter = $reporter if not defined $first_reporter;
return STATUS_OK if $reporter ne $first_reporter;
my $main_port;
my $basedir;
if (exists $ENV{'MASTER_MYPORT'})
{
$main_port = $ENV{'MASTER_MYPORT'};
}
else
{
$main_port = '9306';
}
if (exists $ENV{'DRIZZLE_BASEDIR'})
{
$basedir = $ENV{'DRIZZLE_BASEDIR'};
}
else
{
$basedir= $reporter->serverVariable('basedir');
}
say("$basedir");
my $binary = $basedir.'/drizzled/drizzled' ;
my $datadir = $reporter->serverVariable('datadir');
my $recovery_datadir = $datadir.'_recovery';
my $port = $reporter->serverVariable('mysql_protocol_port');
my $dbh_prev = DBI->connect($reporter->dsn());
if (defined $dbh_prev) {
# Server is still running, kill it.
$dbh_prev->disconnect();
say("Sending shutdown() call to server.");
$dbh_prev->selectrow_array('SELECT shutdown()');
sleep(5);
}
say("Copying datadir... (interrupting the copy operation may cause a false recovery failure to be reported below");
system("cp -r $datadir $recovery_datadir");
system("rm -f $recovery_datadir/core*"); # Remove cores from any previous crash
say("Copying complete");
say("Attempting database recovery using the server ...");
my @drizzled_options = (
'--no-defaults',
'--core-file',
'--datadir="'.$recovery_datadir.'"',
'--basedir="'.$basedir.'"',
'--plugin-add=shutdown_function',
'--mysql-protocol.port='.$port,
);
my $drizzled_command = $binary.' '.join(' ', @drizzled_options).' 2>&1';
say("Executing $drizzled_command .");
my $drizzled_pid = open2(\*RDRFH, \*WTRFH, $drizzled_command);
#
# Phase1 - the server is running single-threaded. We consume the error log and parse it for
# statements that indicate failed recovery
#
my $recovery_status = STATUS_OK;
while (<RDRFH>) {
$_ =~ s{[\r\n]}{}siog;
say($_);
if ($_ =~ m{registration as a STORAGE ENGINE failed.}sio) {
say("Storage engine registration failed");
$recovery_status = STATUS_DATABASE_CORRUPTION;
} elsif ($_ =~ m{corrupt}) {
say("Log message '$_' indicates database corruption");
$recovery_status = STATUS_DATABASE_CORRUPTION;
} elsif ($_ =~ m{exception}sio) {
$recovery_status = STATUS_DATABASE_CORRUPTION;
} elsif ($_ =~ m{ready for connections}sio) {
say("Server Recovery was apparently successfull.") if $recovery_status == STATUS_OK ;
last;
} elsif ($_ =~ m{device full error|no space left on device}sio) {
$recovery_status = STATUS_ENVIRONMENT_FAILURE;
last;
} elsif (
($_ =~ m{got signal}sio) ||
($_ =~ m{segfault}sio) ||
($_ =~ m{segmentation fault}sio)
) {
say("Recovery has apparently crashed.");
$recovery_status = STATUS_DATABASE_CORRUPTION;
}
}
my $dbh = DBI->connect($reporter->dsn());
$recovery_status = STATUS_DATABASE_CORRUPTION if not defined $dbh && $recovery_status == STATUS_OK;
if ($recovery_status > STATUS_OK) {
say("Recovery has failed.");
return $recovery_status;
}
#
# Phase 2 - server is now running, so we execute various statements in order to verify table consistency
# However, while we do that, we are still responsible for processing the error log and dumping it to our stdout.
# If we do not do that, and the server calls flish(stdout) , it will hang waiting for us to consume its stdout, which
# we would no longer be doing. So, we call eater(), which forks a separate process to read the log and dump it to stdout.
#
say("Testing database consistency");
my $eater_pid = eater(*RDRFH);
my $databases = $dbh->selectcol_arrayref("SHOW DATABASES");
foreach my $database (@$databases) {
next if $database =~ m{^(pbxt|mysql|information_schema|data_dictionary)$}sio;
$dbh->do("USE $database");
my $tables = $dbh->selectcol_arrayref("SHOW TABLES");
foreach my $table (@$tables) {
say("Verifying table: $table; database: $database");
my $sth_keys = $dbh->prepare("
SHOW KEYS FROM `$database`.`$table`
");
$sth_keys->execute();
my @walk_queries;
while (my $key_hashref = $sth_keys->fetchrow_hashref()) {
my $key_name = $key_hashref->{Key_name};
my $column_name = $key_hashref->{Column_name};
foreach my $select_type ('*' , "`$column_name`") {
my $main_predicate;
if ($column_name =~ m{int}sio) {
$main_predicate = "WHERE `$column_name` >= -9223372036854775808";
} elsif ($column_name =~ m{char}sio) {
$main_predicate = "WHERE `$column_name` = '' OR `$column_name` != ''";
} elsif ($column_name =~ m{date}sio) {
$main_predicate = "WHERE (`$column_name` >= '1900-01-01' OR `$column_name` = '0000-00-00') ";
} elsif ($column_name =~ m{time}sio) {
$main_predicate = "WHERE (`$column_name` >= '-838:59:59' OR `$column_name` = '00:00:00') ";
} else {
next;
}
if ($column_name =~m{not_null}) {}
else
{
$main_predicate = $main_predicate." OR `$column_name` IS NULL OR `$column_name` IS NOT NULL";
}
push @walk_queries, "SELECT $select_type FROM `$database`.`$table` FORCE INDEX ($key_name) ".$main_predicate;
}
};
my %rows;
my %data;
foreach my $walk_query (@walk_queries) {
my $sth_rows = $dbh->prepare($walk_query);
$sth_rows->execute();
if (defined $sth_rows->err()) {
say("Failing query is $walk_query.");
return STATUS_RECOVERY_FAILURE;
}
my $rows = $sth_rows->rows();
$sth_rows->finish();
push @{$rows{$rows}} , $walk_query;
}
if (keys %rows > 1) {
say("Table `$database`.`$table` is inconsistent.");
print Dumper \%rows;
my @rows_sorted = grep { $_ > 0 } sort keys %rows;
my $least_sql = $rows{$rows_sorted[0]}->[0];
my $most_sql = $rows{$rows_sorted[$#rows_sorted]}->[0];
say("Query that returned least rows: $least_sql\n");
say("Query that returned most rows: $most_sql\n");
my $least_result_obj = GenTest::Result->new(
data => $dbh->selectall_arrayref($least_sql)
);
my $most_result_obj = GenTest::Result->new(
data => $dbh->selectall_arrayref($most_sql)
);
say(GenTest::Comparator::dumpDiff($least_result_obj, $most_result_obj));
$recovery_status = STATUS_DATABASE_CORRUPTION;
}
foreach my $sql (
"CHECK TABLE `$database`.`$table` ",
"ANALYZE TABLE `$database`.`$table`",
#"OPTIMIZE TABLE `$database`.`$table`",
#"REPAIR TABLE `$database`.`$table` "
)
{
say("Executing $sql.");
my $sth = $dbh->prepare($sql);
if (defined $sth)
{
$sth->execute();
return STATUS_DATABASE_CORRUPTION if $dbh->err() > 0 && $dbh->err() != 1178;
if ($sth->{NUM_OF_FIELDS} > 0)
{
my $result = Dumper($sth->fetchall_arrayref());
next if $result =~ m{is not BASE TABLE}sio; # Do not process VIEWs
if ($result =~ m{error'|corrupt|repaired|invalid|crashed}sio)
{
print $result;
return STATUS_DATABASE_CORRUPTION
}
};
$sth->finish();
}
else
{
say("Prepare failed: ".$dbh->errrstr());
return STATUS_DATABASE_CORRUPTION;
}
}
}
}
close(MYSQLD);
if ($recovery_status > STATUS_OK) {
say("Recovery has failed.");
return $recovery_status;
} elsif ($reporter->serverVariable('falcon_error_inject') ne '') {
return STATUS_SERVER_KILLED;
} else {
return STATUS_OK;
}
}
sub eater {
my $fh = shift;
if (my $eater_pid = fork()) {
# parent
return $eater_pid;
} else {
# child
$0 = 'Recovery log eater';
while (<$fh>) {
$_ =~ s{[\r\n]}{}siog;
say($_);
}
exit(0);
}
}
sub type {
return REPORTER_TYPE_ALWAYS | REPORTER_TYPE_PERIODIC;
}
1;
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