Nagios Support Forum

We have migrated our machines from centos to linux 8 version. And after this the Nagios has been upgrade to 4.4.14 version. In which it keeps reporting about the check_mysql_health plugin error.

(No output on stdout) stderr: my variable self masks earlier declaration in same scope at /usr/lib64/nagios/plugins/check_mysql_health line 1064.

Even I am not able to check the plugin version

[root@nagios-data plugins]# ./check_mysql_health -V
"my" variable $self masks earlier declaration in same scope at ./check_mysql_health line 1064.
"my" variable $message masks earlier declaration in same scope at ./check_mysql_health line 1065.
"my" variable $self masks earlier declaration in same scope at ./check_mysql_health line 1070.
"my" variable $message masks earlier declaration in same scope at ./check_mysql_health line 1071.
syntax error at ./check_mysql_health line 1050, near "$llevel qw(CRITICAL WARNING UNKNOWN OK)"
Global symbol "$llevel" requires explicit package name (did you forget to declare "my $llevel"?) at ./check_mysql_health line 1051.
Global symbol "$self" requires explicit package name (did you forget to declare "my $self"?) at ./check_mysql_health line 1052.
Global symbol "$llevel" requires explicit package name (did you forget to declare "my $llevel"?) at ./check_mysql_health line 1052.
Can't redeclare "my" in "my" at ./check_mysql_health line 1059, near "my"
syntax error at ./check_mysql_health line 1061, near "}"
Can't redeclare "my" in "my" at ./check_mysql_health line 1065, near "my"
syntax error at ./check_mysql_health line 1067, near "}"
Can't redeclare "my" in "my" at ./check_mysql_health line 1071, near "my"
syntax error at ./check_mysql_health line 1073, near "}"
./check_mysql_health has too many errors.

You may need to reinstall the script using that docs include with its tar file.

Can you share the step for that or any reference document

Follow the links.
https://exchange.nagios.org/directory/m ... th/details

I saw that earlier but in my existing one I have only two file under plugin check_mysql_health and check_mysql_health.pl

In the latest repo I could see it is a directory. Do i need to replace that directory for check_mysql_health ?

Hi @kg2857,
Can you respond on this

kg2857 wrote: ↑Tue May 20, 2025 12:22 am Follow the links.
https://exchange.nagios.org/directory/m ... th/details

I saw that earlier but in my existing one I have only two file under plugin check_mysql_health and check_mysql_health.pl

In the latest repo I could see it is a directory. Do i need to replace that directory for check_mysql_health ?

Don't extract the tar file in the plugins dir.

kg2857 wrote: ↑Tue May 20, 2025 7:42 pm Don't extract the tar file in the plugins dir.

Can you share more specific step for this. Which location we have to tar the file ? Or in plugin directory place the directory ?

What are the perl packages required for this

[root@nagios-data plugins]# perl -cw ./check_mysql_health
Can't locate Time/HiRes.pm in @INC (you may need to install the Time::HiRes module) (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at ./check_mysql_health line 803.
BEGIN failed--compilation aborted at ./check_mysql_health line 803.
[root@nagios-data plugins]#

If I update this version perl-Time-HiRes-1.9764-459.module+el8.10.0+90267+7012ad3b then seeing the error message shared in the post