mysql-mmm-monitor服务启动错误，没有编译相关的Class::Singleton包

以下是相关的编译过程中错误提示，和错误解决过程；

[root@DB1 mmm_deps]# cd /etc/init.d/[root@DB1 init.d]# chkconfig mysql-mmm-monitor on[root@DB1 init.d]# service mysql-mmm-monitor startDaemon bin: '/usr/sbin/mmm_mond'Daemon pid: '/var/run/mmm_mond.pid'Starting MMM Monitor daemon: Base class package "Class::Singleton" is empty.    (Perhaps you need to 'use' the module which defines that package first.) at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Agents.pm line 2BEGIN failed--compilation aborted at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Agents.pm line 2.Compilation failed in require at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Monitor.pm line 15.BEGIN failed--compilation aborted at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Monitor.pm line 15.Compilation failed in require at /usr/sbin/mmm_mond line 28.BEGIN failed--compilation aborted at /usr/sbin/mmm_mond line 28.failed[root@DB1 init.d]# perl -MCPAN -e shellTerminal does not support AddHistory.cpan shell -- CPAN exploration and modules installation (v1.7602)ReadLine support available (try 'install Bundle::CPAN')cpan> Class::SingletonCan't locate object method "Singleton" via package "Class" (perhaps you forgot to load "Class"?) at /usr/lib/perl5/5.8.8/CPAN.pm line 201, <FIN> line 1.cpan> Class   Unknown command 'Class'. Type ? for help.cpan> install Class::SingletonCPAN: Storable loaded okGoing to read /root/.cpan/Metadata  Database was generated on Mon, 25 Feb 2013 17:53:02 GMTRunning install for module Class::SingletonRunning make for A/AB/ABW/Class-Singleton-1.4.tar.gzCPAN: LWP::UserAgent loaded okFetching with LWP:  http://mirrors.sohu.com/CPAN/authors/id/A/AB/ABW/Class-Singleton-1.4.tar.gzCPAN: Digest::MD5 loaded okFetching with LWP:  http://mirrors.sohu.com/CPAN/authors/id/A/AB/ABW/CHECKSUMSChecksum for /root/.cpan/sources/authors/id/A/AB/ABW/Class-Singleton-1.4.tar.gz okScanning cache /root/.cpan/build for sizesClass-Singleton-1.4/Class-Singleton-1.4/ChangesClass-Singleton-1.4/lib/Class-Singleton-1.4/lib/Class/Class-Singleton-1.4/lib/Class/Singleton.pmClass-Singleton-1.4/Makefile.PLClass-Singleton-1.4/MANIFESTClass-Singleton-1.4/META.ymlClass-Singleton-1.4/READMEClass-Singleton-1.4/t/Class-Singleton-1.4/t/singleton.t  CPAN.pm: Going to build A/AB/ABW/Class-Singleton-1.4.tar.gzChecking if your kit is complete...Looks goodWriting Makefile for Class::Singletoncp lib/Class/Singleton.pm blib/lib/Class/Singleton.pmManifying blib/man3/Class::Singleton.3pm  /usr/bin/make  -- OKRunning make testPERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.tt/singleton....ok                                                            All tests successful.Files=1, Tests=29,  0 wallclock secs ( 0.01 cusr +  0.00 csys =  0.01 CPU)  /usr/bin/make test -- OKRunning make installManifying blib/man3/Class::Singleton.3pmInstalling /usr/lib/perl5/site_perl/5.8.8/Class/Singleton.pmInstalling /usr/share/man/man3/Class::Singleton.3pmWriting /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi/auto/Class/Singleton/.packlistAppending installation info to /usr/lib/perl5/5.8.8/i386-linux-thread-multi/perllocal.pod  /usr/bin/make install  -- OKcpan> exitTerminal does not support GetHistory.Lockfile removed.[root@DB1 init.d]# service mysql-mmm-monitor startDaemon bin: '/usr/sbin/mmm_mond'Daemon pid: '/var/run/mmm_mond.pid'Starting MMM Monitor daemon: Ok[root@DB1 init.d]#