I was thinking of checking for both independently, and taking a logical OR. Would that be sufficient?
I'm trying to avoid file reading if possible. Not that reading through a log is that intensive, but it'd be cleaner if I could poll either Hadoop itself or inspect the processes running. On Fri, Jun 27, 2008 at 1:23 PM, Miles Osborne <[EMAIL PROTECTED]> wrote: > that won't work since the namenode may be down, but the secondary namenode > may be up instead > > why not instead just look at the respective logs? > > Miles > > 2008/6/27 Meng Mao <[EMAIL PROTECTED]>: > > > Is running: > > ps aux | grep [\\.]NameNode > > > > and looking for a non empty response a good way to test HDFS up status? > > > > I'm assuming that if the NameNode process is down, then DFS is definitely > > down? > > Worried that there'd be frequent cases of DFS being messed up but the > > process still running just fine. > > > > On Fri, Jun 27, 2008 at 10:48 AM, Meng Mao <[EMAIL PROTECTED]> wrote: > > > > > For a Nagios script I'm writing, I'd like a command-line method that > > checks > > > if HDFS is up and running. > > > Is there a better way than to attempt a hadoop dfs command and check > the > > > error code? > > > > > > > > > > > -- > > hustlin, hustlin, everyday I'm hustlin > > > > > > -- > The University of Edinburgh is a charitable body, registered in Scotland, > with registration number SC005336. > -- hustlin, hustlin, everyday I'm hustlin
