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From "Terry P." <>
Subject Re: No info for Accumulo Master on Monitor Overview page
Date Thu, 06 Jun 2013 21:48:10 GMT
Hi Eric,
Sorry I should have thought of including a screenshot.  I've attached one
to this email -- first one I've done, I hope it works just like a regular

To ensure I had a clean monitor log, I shutdown Accumulo and started it up
again.  First there are all the [server.Accumulo] entries, here's the head
of that which looks good:

2013-06-06 21:34:37,823 [server.Accumulo] INFO :  monitor starting
2013-06-06 21:34:37,824 [server.Accumulo] INFO :  Instance
2013-06-06 21:34:37,841 [server.Accumulo] INFO :  Data Version 4
2013-06-06 21:34:37,841 [server.Accumulo] INFO :  Attempting to talk to
2013-06-06 21:34:38,026 [server.Accumulo] INFO :  Zookeeper connected and
initialized, attemping to talk to HDFS
2013-06-06 21:34:38,030 [server.Accumulo] INFO :  Connected to HDFS
2013-06-06 21:34:38,034 [server.Accumulo] INFO :  gc.cycle.delay = 5m
2013-06-06 21:34:38,034 [server.Accumulo] INFO :  gc.cycle.start = 30s
2013-06-06 21:34:38,034 [server.Accumulo] INFO :  gc.port.client = 50091
2013-06-06 21:34:38,034 [server.Accumulo] INFO :  gc.threads.delete = 16
2013-06-06 21:34:38,034 [server.Accumulo] INFO :  general.classpaths =

Then at the very end I found (with only INFO messages in between):

2013-06-06 21:34:39,132 [monitor.Monitor] WARN :
        at Source)

That's the last entry in the monitor log.

The second image I attached shows the Master Status page, showing there is
no problem with that display.

This is Accumulo 1.4.2 running as linux account 'accumulo' -- HDFS runs as
the hdfs account, which is why the NameNode section shows "permission
denied."  NameNode and Accumulo Master reside on the same server.  OS is
Red Hat Enterprise Linux 6.3 64-bit.

Thanks in advance,

On Thu, Jun 6, 2013 at 2:58 PM, Eric Newton <> wrote:

> Would you have a screenshot?  Any messages in the monitor log?
> -Eric
> On Thu, Jun 6, 2013 at 2:44 PM, Terry P. <> wrote:
>> Greetings all,
>> We have two Accumulo clusters built from essentially the same build
>> procedure.  Everything is running well with the exception that on the
>> Accumulo Monitor Overview web page, the Accumulo Master box is blank -- the
>> "Accumulo Master" title/hyperlink works (takes you to the "Master Server"
>> page), but nothing is in the box.  The NameNode, JobTracker, and Zookeeper
>> boxes are all populated.
>> On the Master Server page, I see the Master Status that shows 3 Online
>> Tablet Servers, Loggers, Last GC, etc.  It also shows the Table List.  The
>> Tablet Servers page looks good.
>> In these small clusters we have one Accumulo Master that runs on the
>> NameNode, 3 DataNodes, 3 Zookeepers.  I'm in the process of firing up a
>> Secondary NameNode which will also run an Alternate Accumulo Master in case
>> the Master on the NameNode were to fail for some reason, but I have not
>> fired up the Accumulo processes on the Secondary NameNode server yet at all.
>> Any idea where I can look to try and determine why the Accumulo Master
>> box is empty?  It's not really a big deal to me, but I can see an Operator
>> asking questions about it someday ;-)
>> Thanks and best regards,
>> Terry

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