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From Eric Newton <>
Subject Re: Accumulo on MapR Continued
Date Tue, 10 Apr 2012 20:24:07 GMT
This is great!  I'll make tickets.


On Tue, Apr 10, 2012 at 1:24 PM, Keys Botzum <> wrote:

> First, I want to thank Billie, Todd, and Eric for their help so far. It is
> much appreciated.
> Now, on to the results. As I stated before I'm attempting to run the
> Accumulo auto tests from test/system/auto. When run standalone, most tests
> complete successfully on MapR but there have been some issues. That said,
> I'm really glad that Accumulo has all of these tests. Very useful for
> verification.
> First, we found one item that required a change to MapR:
> simple.bulkSplitOptimization.BulkSplitOptimizationTest failed with a seek
> error which has now been addressed thanks to Billie's help. This is MapR
> change 6539 and we'll put that into a release soon.
> Secondly, the Accumulo tests seem to have various minor glitches. I've
> documented them here for reference. I hope this is useful to the Accumulo
> community. I could open JIRA defects if you want but I don't have an
> account on the tracking system. Just let me know.
> 1) simple.examples.Examples was failing with a class loader issue. By
> examining simple/ I was able to determine that the package names
> were not correct when referring to certain subtests, such as
> RandomBatchScanner. Specifically it referred to org.apache.accumulo.examples.client.RandomBatchScanner
> rather than the appropriate org.apache.accumulo.examples.*simple*.client.RandomBatchScanner.
> The same is true for RandomBatchWriter.
> 2) simple.mapreduce.MapReduceTest fails because it assumes ZOOKEEPER_HOME
> is set as an environment variable. Most of the other scripts appear to get
> this information from The workaround is simply to set that
> variable before using
> 3) simple.dynamic.DynamicClassloader fails with class loader issues
> referencing both Accumulo and Hadoop classes. I examined simple/
> and determined that the class path references weren't sufficient where
> javac was invoked. I added the following to the class path command line
> options for javac and now it works:
>  /opt/accumulo-1.4.0/lib/*:/opt/mapr/lib/*:/opt/mapr/hadoop/hadoop-0.20.2/lib/*
> Obviously that's a bit of a hack. I'm sure someone more familiar with the
> code can do this better.
> 4) stress.weird.LateLastContact fails with a ZOOKEEPER_HOME reference
> just like MapReduceTest.
> 5) simple.deleterows.DeleteRowsSplitTest fails with a timeout. The test
> is coded to wait 120 seconds which wasn't' quite long enough on my system.
> I changed it to 180 seconds and it finishes cleanly after 138 seconds. Is
> this typical or expected?
> 6) simple.zooCacheTest.ZooCacheTest has one minor issue. The issue is
> that the test times out on my system after 60 seconds. I changed the
> timeout to 120 seconds and the test completes successfully in 95 seconds.
> Is this typical or expected?
> 7) MapR does not normally install a full zookeeper install on each node.
> Instead we install a zookeeper "client" on each node which is basically the
> zookeeper JAR file - /opt/mapr/lib/zookeeper-3.3.2.jar. If I set
> ZOOKEEPER_HOME to /opt/mapr/lib almost everything works fine since Accumulo
> seems to only need the JAR file at that location. The one exception is
> the stress.weird.LateLastContact which directly references (in
> stress/ which isn't part of the MapR install. I wanted your
> opinion on this. Is the test's behavior crucial? Does Accumulo need more of
> zookeeper than the JAR? I want Accumulo to work,  so if there really is a
> strong need for more of Zookeeper I'll recommend we make adjustments to the
> product once we understand the requirement.
> Third, there are still two tests that are failing when run in standalone
> mode and I haven't determined the issue: simple.largeRow.LargeRowTest and simple.batchScanSplit.BatchScanSplitTest.
> I will post details on those in a moment as separate messages as this email
> is long enough.
> Thanks again for all of your help so far,
> Keys
> ________________________________
> Keys Botzum
> Senior Principal Technologist
> WW Systems Engineering
> 443-718-0098
> MapR Technologies

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