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16fc3a2771437239fbb013342f46f0b51f666584
mariadb/mysql-test/lib/mtr_process.pl
unknown c5fb4b243a Bug#28742 mysql-test-run is very slow on "Stopping All Servers" step 
- Improve shutdown algorithm 
 - Wait up to 5 seconds for processes to exit after their port is free


mysql-test/lib/mtr_process.pl:
  Improve shutdown algorithm, shutdown the server hard
  if it hasn't responded to "mysqladmin shutdown" and it's port is free.
  Print error to servers error log indicating "hard shutdown"
  Give processes up to 5 seconds to exit after their port is free
mysql-test/lib/mtr_report.pl:
  Indicate in what file the warning was found
mysql-test/mysql-test-run.pl:
  Pass path of process error log to 'mtr_check_stop_servers'
2007-06-20 11:47:55 +02:00

1135 lines
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# -*- cperl -*-
# Copyright (C) 2004-2006 MySQL AB
#
# 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
# This is a library file used by the Perl version of mysql-test-run,
# and is part of the translation of the Bourne shell script with the
# same name.
use Socket;
use Errno;
use strict;
use POSIX qw(WNOHANG SIGHUP);
sub mtr_run ($$$$$$;$);
sub mtr_spawn ($$$$$$;$);
sub mtr_check_stop_servers ($);
sub mtr_kill_leftovers ();
sub mtr_wait_blocking ($);
sub mtr_record_dead_children ();
sub mtr_ndbmgm_start($$);
sub mtr_mysqladmin_start($$$);
sub mtr_exit ($);
sub sleep_until_file_created ($$$);
sub mtr_kill_processes ($);
sub mtr_ping_with_timeout($);
sub mtr_ping_port ($);
# Local function
sub spawn_impl ($$$$$$$);
##############################################################################
#
# Execute an external command
#
##############################################################################
sub mtr_run ($$$$$$;$) {
my $path= shift;
my $arg_list_t= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $pid_file= shift; # Not used
my $spawn_opts= shift;
return spawn_impl($path,$arg_list_t,'run',$input,$output,$error,
$spawn_opts);
}
sub mtr_run_test ($$$$$$;$) {
my $path= shift;
my $arg_list_t= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $pid_file= shift; # Not used
my $spawn_opts= shift;
return spawn_impl($path,$arg_list_t,'test',$input,$output,$error,
$spawn_opts);
}
sub mtr_spawn ($$$$$$;$) {
my $path= shift;
my $arg_list_t= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $pid_file= shift; # Not used
my $spawn_opts= shift;
return spawn_impl($path,$arg_list_t,'spawn',$input,$output,$error,
$spawn_opts);
}
sub spawn_impl ($$$$$$$) {
my $path= shift;
my $arg_list_t= shift;
my $mode= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $spawn_opts= shift;
if ( $::opt_script_debug )
{
print STDERR "\n";
print STDERR "#### ", "-" x 78, "\n";
print STDERR "#### ", "STDIN $input\n" if $input;
print STDERR "#### ", "STDOUT $output\n" if $output;
print STDERR "#### ", "STDERR $error\n" if $error;
print STDERR "#### ", "$mode : $path ", join(" ",@$arg_list_t), "\n";
print STDERR "#### ", "spawn options:\n";
if ($spawn_opts)
{
foreach my $key (sort keys %{$spawn_opts})
{
print STDERR "#### ", " - $key: $spawn_opts->{$key}\n";
}
}
else
{
print STDERR "#### ", " none\n";
}
print STDERR "#### ", "-" x 78, "\n";
}
mtr_error("Can't spawn with empty \"path\"") unless defined $path;
FORK:
{
my $pid= fork();
if ( ! defined $pid )
{
if ( $! == $!{EAGAIN} ) # See "perldoc Errno"
{
mtr_warning("Got EAGAIN from fork(), sleep 1 second and redo");
sleep(1);
redo FORK;
}
mtr_error("$path ($pid) can't be forked, error: $!");
}
if ( $pid )
{
return spawn_parent_impl($pid,$mode,$path);
}
else
{
# Child, redirect output and exec
$SIG{INT}= 'DEFAULT'; # Parent do some stuff, we don't
my $log_file_open_mode = '>';
if ($spawn_opts and $spawn_opts->{'append_log_file'})
{
$log_file_open_mode = '>>';
}
if ( $output )
{
if ( $::glob_win32_perl )
{
# Don't redirect stdout on ActiveState perl since this is
# just another thread in the same process.
# Should be fixed so that the thread that is created with fork
# executes the exe in another process and wait's for it to return.
# In the meanwhile, we get all the output from mysqld's to screen
}
elsif ( ! open(STDOUT,$log_file_open_mode,$output) )
{
mtr_child_error("can't redirect STDOUT to \"$output\": $!");
}
}
if ( $error )
{
if ( $output eq $error )
{
if ( ! open(STDERR,">&STDOUT") )
{
mtr_child_error("can't dup STDOUT: $!");
}
}
else
{
if ( $::glob_win32_perl )
{
# Don't redirect stdout on ActiveState perl since this is
# just another thread in the same process.
# Should be fixed so that the thread that is created with fork
# executes the exe in another process and wait's for it to return.
# In the meanwhile, we get all the output from mysqld's to screen
}
elsif ( ! open(STDERR,$log_file_open_mode,$error) )
{
mtr_child_error("can't redirect STDERR to \"$error\": $!");
}
}
}
if ( $input )
{
if ( ! open(STDIN,"<",$input) )
{
mtr_child_error("can't redirect STDIN to \"$input\": $!");
}
}
if ( ! exec($path,@$arg_list_t) )
{
mtr_child_error("failed to execute \"$path\": $!");
}
mtr_error("Should never come here 1!");
}
mtr_error("Should never come here 2!");
}
mtr_error("Should never come here 3!");
}
sub spawn_parent_impl {
my $pid= shift;
my $mode= shift;
my $path= shift;
if ( $mode eq 'run' or $mode eq 'test' )
{
if ( $mode eq 'run' )
{
# Simple run of command, wait blocking for it to return
my $ret_pid= waitpid($pid,0);
if ( $ret_pid != $pid )
{
# The "simple" waitpid has failed, print debug info
# and try to handle the error
mtr_warning("waitpid($pid, 0) returned $ret_pid " .
"when waiting for '$path', error: '$!'");
if ( $ret_pid == -1 )
{
# waitpid returned -1, that would indicate the process
# no longer exist and waitpid couldn't wait for it.
return 1;
}
mtr_error("Error handling failed");
}
return mtr_process_exit_status($?);
}
else
{
# We run mysqltest and wait for it to return. But we try to
# catch dying mysqld processes as well.
#
# We do blocking waitpid() until we get the return from the
# "mysqltest" call. But if a mysqld process dies that we
# started, we take this as an error, and kill mysqltest.
my $exit_value= -1;
my $saved_exit_value;
my $ret_pid; # What waitpid() returns
while ( ($ret_pid= waitpid(-1,0)) != -1 )
{
# Someone terminated, don't know who. Collect
# status info first before $? is lost,
# but not $exit_value, this is flagged from
my $timer_name= mtr_timer_timeout($::glob_timers, $ret_pid);
if ( $timer_name )
{
if ( $timer_name eq "suite" )
{
# We give up here
# FIXME we should only give up the suite, not all of the run?
print STDERR "\n";
mtr_error("Test suite timeout");
}
elsif ( $timer_name eq "testcase" )
{
$saved_exit_value= 63; # Mark as timeout
kill(9, $pid); # Kill mysqltest
next; # Go on and catch the termination
}
}
if ( $ret_pid == $pid )
{
# We got termination of mysqltest, we are done
$exit_value= mtr_process_exit_status($?);
last;
}
# One of the child processes died, unless this was expected
# mysqltest should be killed and test aborted
check_expected_crash_and_restart($ret_pid);
}
if ( $ret_pid != $pid )
{
# We terminated the waiting because a "mysqld" process died.
# Kill the mysqltest process.
mtr_verbose("Kill mysqltest because another process died");
kill(9,$pid);
$ret_pid= waitpid($pid,0);
if ( $ret_pid != $pid )
{
mtr_error("$path ($pid) got lost somehow");
}
}
return $saved_exit_value || $exit_value;
}
}
else
{
# We spawned a process we don't wait for
return $pid;
}
}
# ----------------------------------------------------------------------
# We try to emulate how an Unix shell calculates the exit code
# ----------------------------------------------------------------------
sub mtr_process_exit_status {
my $raw_status= shift;
if ( $raw_status & 127 )
{
return ($raw_status & 127) + 128; # Signal num + 128
}
else
{
return $raw_status >> 8; # Exit code
}
}
##############################################################################
#
# Kill processes left from previous runs
#
##############################################################################
# Kill all processes(mysqld, ndbd, ndb_mgmd and im) that would conflict with
# this run
# Make sure to remove the PID file, if any.
# kill IM manager first, else it will restart the servers
sub mtr_kill_leftovers () {
mtr_report("Killing Possible Leftover Processes");
mtr_debug("mtr_kill_leftovers(): started.");
my @kill_pids;
my %admin_pids;
foreach my $srv (@{$::master}, @{$::slave})
{
mtr_debug(" - mysqld " .
"(pid: $srv->{pid}; " .
"pid file: '$srv->{path_pid}'; " .
"socket: '$srv->{path_sock}'; ".
"port: $srv->{port})");
my $pid= mtr_mysqladmin_start($srv, "shutdown", 70);
# Save the pid of the mysqladmin process
$admin_pids{$pid}= 1;
push(@kill_pids,{
pid => $srv->{'pid'},
pidfile => $srv->{'path_pid'},
sockfile => $srv->{'path_sock'},
port => $srv->{'port'},
});
$srv->{'pid'}= 0; # Assume we are done with it
}
if ( ! $::opt_skip_ndbcluster )
{
# Start shutdown of clusters.
mtr_debug("Shutting down cluster...");
foreach my $cluster (@{$::clusters})
{
mtr_debug(" - cluster " .
"(pid: $cluster->{pid}; " .
"pid file: '$cluster->{path_pid})");
my $pid= mtr_ndbmgm_start($cluster, "shutdown");
# Save the pid of the ndb_mgm process
$admin_pids{$pid}= 1;
push(@kill_pids,{
pid => $cluster->{'pid'},
pidfile => $cluster->{'path_pid'}
});
$cluster->{'pid'}= 0; # Assume we are done with it
foreach my $ndbd (@{$cluster->{'ndbds'}})
{
mtr_debug(" - ndbd " .
"(pid: $ndbd->{pid}; " .
"pid file: '$ndbd->{path_pid})");
push(@kill_pids,{
pid => $ndbd->{'pid'},
pidfile => $ndbd->{'path_pid'},
});
$ndbd->{'pid'}= 0; # Assume we are done with it
}
}
}
# Wait for all the admin processes to complete
mtr_wait_blocking(\%admin_pids);
# If we trusted "mysqladmin --shutdown_timeout= ..." we could just
# terminate now, but we don't (FIXME should be debugged).
# So we try again to ping and at least wait the same amount of time
# mysqladmin would for all to die.
mtr_ping_with_timeout(\@kill_pids);
# We now have tried to terminate nice. We have waited for the listen
# port to be free, but can't really tell if the mysqld process died
# or not. We now try to find the process PID from the PID file, and
# send a kill to that process. Note that Perl let kill(0,@pids) be
# a way to just return the numer of processes the kernel can send
# signals to. So this can be used (except on Cygwin) to determine
# if there are processes left running that we cound out might exists.
#
# But still after all this work, all we know is that we have
# the ports free.
# We scan the "var/run/" directory for other process id's to kill
my $rundir= "$::opt_vardir/run";
mtr_debug("Processing PID files in directory '$rundir'...");
if ( -d $rundir )
{
opendir(RUNDIR, $rundir)
or mtr_error("can't open directory \"$rundir\": $!");
my @pids;
while ( my $elem= readdir(RUNDIR) )
{
# Only read pid from files that end with .pid
if ( $elem =~ /.*[.]pid$/)
{
my $pidfile= "$rundir/$elem";
if ( -f $pidfile )
{
mtr_debug("Processing PID file: '$pidfile'...");
my $pid= mtr_get_pid_from_file($pidfile);
mtr_debug("Got pid: $pid from file '$pidfile'");
if ( $::glob_cygwin_perl or kill(0, $pid) )
{
mtr_debug("There is process with pid $pid -- scheduling for kill.");
push(@pids, $pid); # We know (cygwin guess) it exists
}
else
{
mtr_debug("There is no process with pid $pid -- skipping.");
}
}
}
else
{
mtr_warning("Found non pid file $elem in $rundir")
if -f "$rundir/$elem";
next;
}
}
closedir(RUNDIR);
if ( @pids )
{
mtr_debug("Killing the following processes with PID files: " .
join(' ', @pids) . "...");
start_reap_all();
if ( $::glob_cygwin_perl )
{
# We have no (easy) way of knowing the Cygwin controlling
# process, in the PID file we only have the Windows process id.
system("kill -f " . join(" ",@pids)); # Hope for the best....
mtr_debug("Sleep 5 seconds waiting for processes to die");
sleep(5);
}
else
{
my $retries= 10; # 10 seconds
do
{
mtr_debug("Sending SIGKILL to pids: " . join(' ', @pids));
kill(9, @pids);
mtr_report("Sleep 1 second waiting for processes to die");
sleep(1) # Wait one second
} while ( $retries-- and kill(0, @pids) );
if ( kill(0, @pids) ) # Check if some left
{
mtr_warning("can't kill process(es) " . join(" ", @pids));
}
}
stop_reap_all();
}
}
else
{
mtr_debug("Directory for PID files ($rundir) does not exist.");
}
# We may have failed everything, but we now check again if we have
# the listen ports free to use, and if they are free, just go for it.
mtr_debug("Checking known mysqld servers...");
foreach my $srv ( @kill_pids )
{
if ( defined $srv->{'port'} and mtr_ping_port($srv->{'port'}) )
{
mtr_warning("can't kill old process holding port $srv->{'port'}");
}
}
mtr_debug("mtr_kill_leftovers(): finished.");
}
#
# Check that all processes in "spec" are shutdown gracefully
# else kill them off hard
#
sub mtr_check_stop_servers ($) {
my $spec= shift;
# Return if no processes are defined
return if ! @$spec;
mtr_verbose("mtr_check_stop_servers");
# ----------------------------------------------------------------------
# Wait until servers in "spec" has stopped listening
# to their ports or timeout occurs
# ----------------------------------------------------------------------
mtr_ping_with_timeout(\@$spec);
# ----------------------------------------------------------------------
# Use waitpid() nonblocking for a little while, to see how
# many process's will exit sucessfully.
# This is the normal case.
# ----------------------------------------------------------------------
my $wait_counter= 50; # Max number of times to redo the loop
foreach my $srv ( @$spec )
{
my $pid= $srv->{'pid'};
my $ret_pid;
if ( $pid )
{
$ret_pid= waitpid($pid,&WNOHANG);
if ($ret_pid == $pid)
{
mtr_verbose("Caught exit of process $ret_pid");
$srv->{'pid'}= 0;
}
elsif ($ret_pid == 0)
{
mtr_verbose("Process $pid is still alive");
if ($wait_counter-- > 0)
{
# Give the processes more time to exit
select(undef, undef, undef, (0.1));
redo;
}
}
else
{
mtr_warning("caught exit of unknown child $ret_pid");
}
}
}
# ----------------------------------------------------------------------
# The processes that haven't yet exited need to
# be killed hard, put them in "kill_pids" hash
# ----------------------------------------------------------------------
my %kill_pids;
foreach my $srv ( @$spec )
{
my $pid= $srv->{'pid'};
if ( $pid )
{
# Server is still alive, put it in list to be hard killed
$kill_pids{$pid}= 1;
# Write a message to the process's error log (if it has one)
# that it's being killed hard.
if ( defined $srv->{'errfile'} )
{
mtr_tofile($srv->{'errfile'}, "Note: Forcing kill of process $pid\n");
}
mtr_warning("Forcing kill of process $pid");
}
else
{
# Server is dead, remove the pidfile if it exists
#
# Race, could have been removed between test with -f
# and the unlink() below, so better check again with -f
if ( -f $srv->{'pidfile'} and ! unlink($srv->{'pidfile'}) and
-f $srv->{'pidfile'} )
{
mtr_error("can't remove $srv->{'pidfile'}");
}
}
}
if ( ! keys %kill_pids )
{
# All processes has exited gracefully
return;
}
mtr_kill_processes(\%kill_pids);
# ----------------------------------------------------------------------
# All processes are killed, cleanup leftover files
# ----------------------------------------------------------------------
{
my $errors= 0;
foreach my $srv ( @$spec )
{
if ( $srv->{'pid'} )
{
# Server has been hard killed, clean it's resources
foreach my $file ($srv->{'pidfile'}, $srv->{'sockfile'})
{
# Know it is dead so should be no race, careful anyway
if ( defined $file and -f $file and ! unlink($file) and -f $file )
{
$errors++;
mtr_warning("couldn't delete $file");
}
}
$srv->{'pid'}= 0;
}
}
if ( $errors )
{
# There where errors killing processes
# do one last attempt to ping the servers
# and if they can't be pinged, assume they are dead
if ( ! mtr_ping_with_timeout( \@$spec ) )
{
mtr_error("we could not kill or clean up all processes");
}
else
{
mtr_verbose("All ports were free, continuing");
}
}
}
}
# Wait for all the process in the list to terminate
sub mtr_wait_blocking($) {
my $admin_pids= shift;
# Return if no processes defined
return if ! %$admin_pids;
mtr_verbose("mtr_wait_blocking");
# Wait for all the started processes to exit
# As mysqladmin is such a simple program, we trust it to terminate itself.
# I.e. we wait blocking, and wait for them all before we go on.
foreach my $pid (keys %{$admin_pids})
{
my $ret_pid= waitpid($pid,0);
}
}
# Start "mysqladmin <command>" for a specific mysqld
sub mtr_mysqladmin_start($$$) {
my $srv= shift;
my $command= shift;
my $adm_shutdown_tmo= shift;
my $args;
mtr_init_args(\$args);
mtr_add_arg($args, "--no-defaults");
mtr_add_arg($args, "--user=%s", $::opt_user);
mtr_add_arg($args, "--password=");
mtr_add_arg($args, "--silent");
if ( -e $srv->{'path_sock'} )
{
mtr_add_arg($args, "--socket=%s", $srv->{'path_sock'});
}
if ( $srv->{'port'} )
{
mtr_add_arg($args, "--port=%s", $srv->{'port'});
}
if ( $srv->{'port'} and ! -e $srv->{'path_sock'} )
{
mtr_add_arg($args, "--protocol=tcp"); # Needed if no --socket
}
mtr_add_arg($args, "--connect_timeout=5");
# Shutdown time must be high as slave may be in reconnect
mtr_add_arg($args, "--shutdown_timeout=$adm_shutdown_tmo");
mtr_add_arg($args, "$command");
my $pid= mtr_spawn($::exe_mysqladmin, $args,
"", "", "", "",
{ append_log_file => 1 });
mtr_verbose("mtr_mysqladmin_start, pid: $pid");
return $pid;
}
# Start "ndb_mgm shutdown" for a specific cluster, it will
# shutdown all data nodes and leave the ndb_mgmd running
sub mtr_ndbmgm_start($$) {
my $cluster= shift;
my $command= shift;
my $args;
mtr_init_args(\$args);
mtr_add_arg($args, "--no-defaults");
mtr_add_arg($args, "--core");
mtr_add_arg($args, "--try-reconnect=1");
mtr_add_arg($args, "--ndb_connectstring=%s", $cluster->{'connect_string'});
mtr_add_arg($args, "-e");
mtr_add_arg($args, "$command");
my $pid= mtr_spawn($::exe_ndb_mgm, $args,
"", "/dev/null", "/dev/null", "",
{});
mtr_verbose("mtr_ndbmgm_start, pid: $pid");
return $pid;
}
# Ping all servers in list, exit when none of them answers
# or when timeout has passed
sub mtr_ping_with_timeout($) {
my $spec= shift;
my $timeout= 200; # 20 seconds max
my $res= 1; # If we just fall through, we are done
# in the sense that the servers don't
# listen to their ports any longer
mtr_debug("Waiting for mysqld servers to stop...");
TIME:
while ( $timeout-- )
{
foreach my $srv ( @$spec )
{
$res= 1; # We are optimistic
if ( $srv->{'pid'} and defined $srv->{'port'} )
{
if ( mtr_ping_port($srv->{'port'}) )
{
mtr_verbose("waiting for process $srv->{'pid'} to stop ".
"using port $srv->{'port'}");
# Millisceond sleep emulated with select
select(undef, undef, undef, (0.1));
$res= 0;
next TIME;
}
else
{
# Process was not using port
}
}
}
last; # If we got here, we are done
}
if ($res)
{
mtr_debug("mtr_ping_with_timeout(): All mysqld instances are down.");
}
else
{
mtr_report("mtr_ping_with_timeout(): At least one server is alive.");
}
return $res;
}
#
# Loop through our list of processes and look for and entry
# with the provided pid
# Set the pid of that process to 0 if found
#
sub mark_process_dead($)
{
my $ret_pid= shift;
foreach my $mysqld (@{$::master}, @{$::slave})
{
if ( $mysqld->{'pid'} eq $ret_pid )
{
mtr_verbose("$mysqld->{'type'} $mysqld->{'idx'} exited, pid: $ret_pid");
$mysqld->{'pid'}= 0;
return;
}
}
foreach my $cluster (@{$::clusters})
{
if ( $cluster->{'pid'} eq $ret_pid )
{
mtr_verbose("$cluster->{'name'} cluster ndb_mgmd exited, pid: $ret_pid");
$cluster->{'pid'}= 0;
return;
}
foreach my $ndbd (@{$cluster->{'ndbds'}})
{
if ( $ndbd->{'pid'} eq $ret_pid )
{
mtr_verbose("$cluster->{'name'} cluster ndbd exited, pid: $ret_pid");
$ndbd->{'pid'}= 0;
return;
}
}
}
mtr_warning("mark_process_dead couldn't find an entry for pid: $ret_pid");
}
#
# Loop through our list of processes and look for and entry
# with the provided pid, if found check for the file indicating
# expected crash and restart it.
#
sub check_expected_crash_and_restart($)
{
my $ret_pid= shift;
foreach my $mysqld (@{$::master}, @{$::slave})
{
if ( $mysqld->{'pid'} eq $ret_pid )
{
mtr_verbose("$mysqld->{'type'} $mysqld->{'idx'} exited, pid: $ret_pid");
$mysqld->{'pid'}= 0;
# Check if crash expected and restart if it was
my $expect_file= "$::opt_vardir/tmp/" . "$mysqld->{'type'}" .
"$mysqld->{'idx'}" . ".expect";
if ( -f $expect_file )
{
mtr_verbose("Crash was expected, file $expect_file exists");
mysqld_start($mysqld, $mysqld->{'start_opts'},
$mysqld->{'start_slave_master_info'});
unlink($expect_file);
}
return;
}
}
foreach my $cluster (@{$::clusters})
{
if ( $cluster->{'pid'} eq $ret_pid )
{
mtr_verbose("$cluster->{'name'} cluster ndb_mgmd exited, pid: $ret_pid");
$cluster->{'pid'}= 0;
# Check if crash expected and restart if it was
my $expect_file= "$::opt_vardir/tmp/ndb_mgmd_" . "$cluster->{'type'}" .
".expect";
if ( -f $expect_file )
{
mtr_verbose("Crash was expected, file $expect_file exists");
ndbmgmd_start($cluster);
unlink($expect_file);
}
return;
}
foreach my $ndbd (@{$cluster->{'ndbds'}})
{
if ( $ndbd->{'pid'} eq $ret_pid )
{
mtr_verbose("$cluster->{'name'} cluster ndbd exited, pid: $ret_pid");
$ndbd->{'pid'}= 0;
# Check if crash expected and restart if it was
my $expect_file= "$::opt_vardir/tmp/ndbd_" . "$cluster->{'type'}" .
"$ndbd->{'idx'}" . ".expect";
if ( -f $expect_file )
{
mtr_verbose("Crash was expected, file $expect_file exists");
ndbd_start($cluster, $ndbd->{'idx'},
$ndbd->{'start_extra_args'});
unlink($expect_file);
}
return;
}
}
}
if ($::instance_manager->{'spawner_pid'} eq $ret_pid)
{
return;
}
mtr_warning("check_expected_crash_and_restart couldn't find an entry for pid: $ret_pid");
}
##############################################################################
#
# The operating system will keep information about dead children,
# we read this information here, and if we have records the process
# is alive, we mark it as dead.
#
##############################################################################
sub mtr_record_dead_children () {
my $process_died= 0;
my $ret_pid;
# Wait without blockinng to see if any processes had died
# -1 or 0 means there are no more procesess to wait for
while ( ($ret_pid= waitpid(-1,&WNOHANG)) != 0 and $ret_pid != -1)
{
mtr_warning("mtr_record_dead_children: $ret_pid");
mark_process_dead($ret_pid);
$process_died= 1;
}
return $process_died;
}
sub start_reap_all {
# This causes terminating processes to not become zombies, avoiding
# the need for (or possibility of) explicit waitpid().
$SIG{CHLD}= 'IGNORE';
# On some platforms (Linux, QNX, OSX, ...) there is potential race
# here. If a process terminated before setting $SIG{CHLD} (but after
# any attempt to waitpid() it), it will still be a zombie. So we
# have to handle any such process here.
my $pid;
while(($pid= waitpid(-1, &WNOHANG)) != 0 and $pid != -1)
{
mtr_warning("start_reap_all pid: $pid");
mark_process_dead($pid);
};
}
sub stop_reap_all {
$SIG{CHLD}= 'DEFAULT';
}
sub mtr_ping_port ($) {
my $port= shift;
mtr_verbose("mtr_ping_port: $port");
my $remote= "localhost";
my $iaddr= inet_aton($remote);
if ( ! $iaddr )
{
mtr_error("can't find IP number for $remote");
}
my $paddr= sockaddr_in($port, $iaddr);
my $proto= getprotobyname('tcp');
if ( ! socket(SOCK, PF_INET, SOCK_STREAM, $proto) )
{
mtr_error("can't create socket: $!");
}
mtr_debug("Pinging server (port: $port)...");
if ( connect(SOCK, $paddr) )
{
close(SOCK); # FIXME check error?
mtr_verbose("USED");
return 1;
}
else
{
mtr_verbose("FREE");
return 0;
}
}
##############################################################################
#
# Wait for a file to be created
#
##############################################################################
# FIXME check that the pidfile contains the expected pid!
sub sleep_until_file_created ($$$) {
my $pidfile= shift;
my $timeout= shift;
my $pid= shift;
my $sleeptime= 100; # Milliseconds
my $loops= ($timeout * 1000) / $sleeptime;
for ( my $loop= 1; $loop <= $loops; $loop++ )
{
if ( -r $pidfile )
{
return $pid;
}
# Check if it died after the fork() was successful
if ( $pid != 0 && waitpid($pid,&WNOHANG) == $pid )
{
mtr_warning("Process $pid died");
return 0;
}
mtr_debug("Sleep $sleeptime milliseconds waiting for $pidfile");
# Print extra message every 60 seconds
my $seconds= ($loop * $sleeptime) / 1000;
if ( $seconds > 1 and int($seconds * 10) % 600 == 0 )
{
my $left= $timeout - $seconds;
mtr_warning("Waited $seconds seconds for $pidfile to be created, " .
"still waiting for $left seconds...");
}
# Millisceond sleep emulated with select
select(undef, undef, undef, ($sleeptime/1000));
}
return 0;
}
sub mtr_kill_processes ($) {
my $pids = shift;
mtr_verbose("mtr_kill_processes (" . join(" ", keys %{$pids}) . ")");
foreach my $pid (keys %{$pids})
{
if ($pid <= 0)
{
mtr_warning("Trying to kill illegal pid: $pid");
next;
}
my $signaled_procs= kill(9, $pid);
if ($signaled_procs == 0)
{
# No such process existed, assume it's killed
mtr_verbose("killed $pid(no such process)");
}
else
{
my $ret_pid= waitpid($pid,0);
if ($ret_pid == $pid)
{
mtr_verbose("killed $pid(got the pid)");
}
elsif ($ret_pid == -1)
{
mtr_verbose("killed $pid(got -1)");
}
}
}
mtr_verbose("done killing processes");
}
##############################################################################
#
# When we exit, we kill off all children
#
##############################################################################
sub mtr_exit ($) {
my $code= shift;
mtr_timer_stop_all($::glob_timers);
local $SIG{HUP} = 'IGNORE';
# ToDo: Signalling -$$ will only work if we are the process group
# leader (in fact on QNX it will signal our session group leader,
# which might be Do-compile or Pushbuild, causing tests to be
# aborted). So we only do it if we are the group leader. We might
# set ourselves as the group leader at startup (with
# POSIX::setpgrp(0,0)), but then care must be needed to always do
# proper child process cleanup.
POSIX::kill(SIGHUP, -$$) if !$::glob_win32_perl and $$ == getpgrp();
exit($code);
}
###########################################################################
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