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# Author: Wim Rijnders, 17-10-2002
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# Nagios host script to check if any specified java processes are running.
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# Implementation Notes:
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# ---------------------
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# check_disk_smb was used as a starting point, since it was written in perl.
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# This script has been created and tested on Linux RH 7.1.
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# I tried OS-X Darwin (BSD), but the ps command works differently.
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# Notably, you can't get a combined list of child processes. The best approach
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# appears to be to use 'ps -wwaxo command' combined with 'ps -M' (or suchlike)
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########################################################################
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use vars qw($opt_w $opt_c $verbose $classname);
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use vars qw($PROGNAME);
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use utils qw($TIMEOUT %ERRORS &print_revision &support &usage);
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$PROGNAME="check_javaprocs";
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sub check_ranges ($ $ $ $);
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Getopt::Long::Configure('bundling', 'no_ignore_case');
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("V|version" => \&version,
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"v|verbose" => \$verbose,
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"w|warning=s" => \$opt_w,
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"c|critical=s" => \$opt_c,
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"n|name=s" => \$classname
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($opt_w) || ($opt_w = shift);
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check_ranges($opt_w,\$min_warn, \$max_warn, "warning");
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($opt_c) || ($opt_c = shift);
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check_ranges($opt_c,\$min_crit, \$max_crit, "critical");
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# Determine # of running processes for the java programs that interest us.
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my @javalist = getJavaList();
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if ( defined $classname ) {
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#filter out a single java process based on class name
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@fields = split(/\s+/, $_);
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$total = $fields[-1] and last if $classname eq $fields[0];
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$msgout .= "$total processes for $classname\n";
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#Handle all java processes
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@fields = split(/\s+/, $_);
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$total += $fields[-1];
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$msgout .= " $fields[-1] processes for ";
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$msgout .= (scalar @fields > 1)? $fields[0] : "unknown" ;
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my $msgtotal = "$total java processes for ". scalar @javalist . " applications";
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if ( defined $verbose ) {
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$msgout = $msgtotal . $msgout;
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# Set the state with the data we now have accumulated
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# Note that due to the order of testing, warnings have precedence over
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# criticals. This is logical, since you should be able to create a criticals
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# range which encompasses a warning range. eg. following should be possible:
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# check_javaproc -w 5:10 -c 3:12
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# proper specification of the ranges is the responsibility of the script user.
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$state = 'CRITICAL' if (defined $min_crit && $total < $min_crit);
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$state = 'CRITICAL' if (defined $max_crit && $total > $max_crit);
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$state = 'CRITICAL' if (!defined $min_crit && !defined $max_crit && $total==0 );
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$state = 'WARNING' if (defined $min_warn && $total < $min_warn);
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$state = 'WARNING' if (defined $max_warn && $total > $max_warn);
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print "$state\n" if ($verbose);
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exit $ERRORS{$state};
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###################################
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# Support routines for Nagios
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###################################
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sub check_ranges($$$$) {
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my ($opt, $min, $max, $rangename) = @_;
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if ( defined $opt ) {
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if ( $opt =~ /^([0-9]*)\:([0-9]*)$/) {
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$$min = $1 if $1 > 0;
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usage("Invalid $rangename range: $opt\n");
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if ( defined $$min && defined $$max ) {
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usage("Min value of $rangename range larger than max value: $opt\n") if ( $$min > $$max);
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print "Usage: $PROGNAME [-v] [-w <min:max>] [-c <min:max>] [ -n <classname>]\n";
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print "Copyright (c) 2002 by Wim Rijnders
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Perl Check java processes plugin for Nagios
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Return additional information.
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Intended as a command-line aid, not recommended for Nagios script usage.
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-w, --warning=INTEGER:INTEGER
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Minimum and maximum number of processes outside of which a warning will be
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generated. If omitted, no warning is generated.
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-c, --critical=INTEGER:INTEGER
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Minimum and maximum number of processes outside of which a critical will be
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generated. If omitted, a critical is generated if no processes are running.
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Name of class specified on the java command line (from which main() is run).
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If omitted, all java processes are taken into account.
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print_revision($PROGNAME,'$Revision: 1.1 $ ');
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###################################
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# Routines for delivering the data
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###################################
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# Generate a formatted list of running java processes.
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# Returns an array of strings having the following syntax:
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# <java class running as main> <parameters if any> <#processes for this class>
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local $ENV{'PATH'} = '/bin:/usr/bin';
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local $ENV{'BASH_ENV'} = '~/.bashrc';
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# We are only interested in the full command line
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# The -H opstion is important for the order of the processes;
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# this option ensures that all child processes are listed under
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@output=`ps -AHo \"\%a\" -ww`;
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#remove preceding whitespace and final EOL
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#Combine any consecutive processes with exactly the same command line
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@output = checkSameLine(@output);
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#Filter out all java processes
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for (my $i = 0; $i < scalar @output; ++$i) {
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push @javalist, $output[$i] if $output[$i] =~ /^\S*java/;
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foreach (@javalist) {
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#The java statement at the beginning is redundant; remove it
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s/\-(classpath|cp)\s+\S+//g;
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#remove any other parameters we don't want to see
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#remove any redundant whitespaces at the beginning
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# Combine all consecutive lines with an identical command line
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# to a signle line with a count at the end
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foreach my $a (@input) {
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if ( $prevline eq $a) {
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push @output, $prevline . " " . ($prevcount + 1);
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#don't forget the last item!
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if ( $prevcount > 0 ) {
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push @output, $prevline . " " . ($prevcount + 1);
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#======= end check_javaproc =====
added
removed
contrib/check_javaproc.pl
