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From "Josh Elser (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-3261) Image Randomwalk fails if no rows are found
Date Mon, 27 Oct 2014 00:14:33 GMT
Josh Elser created ACCUMULO-3261:

             Summary: Image Randomwalk fails if no rows are found
                 Key: ACCUMULO-3261
             Project: Accumulo
          Issue Type: Bug
          Components: test
    Affects Versions: 1.6.1, 1.5.2
            Reporter: Josh Elser
            Assignee: Josh Elser
             Fix For: 1.5.3, 1.6.2, 1.7.0

The ScanMeta node from the Image module is subject to failure when the random UUID it chooses
as the starting row sorts after any rows currently in the table.

26 16:52:29,543 [randomwalk.Framework] ERROR: Error during random walk
java.lang.Exception: Error running node image.ScanMeta
	at org.apache.accumulo.test.randomwalk.Module.visit(
	at org.apache.accumulo.test.randomwalk.Framework.main(
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(
	at java.lang.reflect.Method.invoke(
	at org.apache.accumulo.start.Main$
Caused by: java.lang.IllegalArgumentException: ranges must be non null and contain at least
1 range
	at org.apache.accumulo.core.client.impl.TabletServerBatchReader.setRanges(
	at org.apache.accumulo.test.randomwalk.image.ScanMeta.visit(
	at org.apache.accumulo.test.randomwalk.Module$
	at org.apache.accumulo.test.randomwalk.Module$
	at java.util.concurrent.Executors$
	at java.util.concurrent.ThreadPoolExecutor.runWorker(
	at java.util.concurrent.ThreadPoolExecutor$
	... 1 more

It's likely that this would only arise if ScanMeta is called very early on in the module which
is very unlikely given the weights in Image.xml but lines up with the log file.

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