Maui Scheduler Molokini Edition FAQ
Maui Scheduler Steering Committee
15 Apr 2002
Frequently Asked Questions about the Maui Scheduler.
1.1 What/Where is Maui?
1.2 What is the Maui Scheduler?
1.3 What is the Maui Scheduler used for?
1.4 What is the largest system configuration the Maui Scheduler has run on?
1.5 What architectures and operating systems does the Maui Scheduler run on?
2.1 Why Java?
2.2 What's this about Python code?
2.3 Do I have to install a JVM (Java Virtual Machine) on all the
2.4 Where do I install the various RPMs?
2.5 mauid user issues
2.6 What network protocols does the Maui Scheduler use?
2.7 Do I have to use a MySQL database?
2.8 Can I use a MySQL database on another machine besides the one
Cannot connect to MySQL server on HOST:PORT. Is there a MySQL server running on the machine/port you are trying to connect to?
Invalid authorization specification: Access denied for user: 'mauid@localhost' (Using password: YES)
3.3 Each scheduler command prints a
SECURITY WARNING! You're using a well-known default key, all your communications could be easily snooped! Please run the
script to generate a new key, and then securely copy the key to all nodes in your cluster.
3.4 The logfile prints
SECURITY: old message! possible replay attack
3.5 A few commands print
3.6 Errors Starting Daemon(s)
3.7 Client command prints out
Request timestamp is too old!
3.8 There's no output for my job!
3.9 Job output for my "default" JobType job is overwritten!
3.10 Command output is gibberish on terminal (or in log file)!
3.11 Scheduler and/or Node Daemon logfile reports ClassCastException in communications
3.12 Scheduler command prints
Can't getgrgid for gid=NUM
Can't getpwuid for uid=NUM
, or similar.
3.13 Help I cannot shutdown the scheduler or nodedaemon using
Packet is larger than max_allowed_packet from server
, and scheduler cannot checkpoint!
3.15 Scheduler encounters the same problem each time it's restarted!
3.16 I'm not seeing all the nodes in my cluster or some/one of the nodes shows up but its features/values keep changing!