[jira] [Resolved] (ACCUMULO-3261) Image Randomwalk fails if no rows are found

["Josh Elser (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ACCUMULO-3261?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Josh Elser resolved ACCUMULO-3261.
----------------------------------
    Resolution: Fixed

> Image Randomwalk fails if no rows are found
> -------------------------------------------
>
>                 Key: ACCUMULO-3261
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3261
>             Project: Accumulo
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 1.5.2, 1.6.1
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>             Fix For: 1.5.3, 1.6.2, 1.7.0
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> 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.
> {noformat}
> 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(Module.java:343)
> 	at org.apache.accumulo.test.randomwalk.Framework.run(Framework.java:63)
> 	at org.apache.accumulo.test.randomwalk.Framework.main(Framework.java:122)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:606)
> 	at org.apache.accumulo.start.Main$1.run(Main.java:141)
> 	at java.lang.Thread.run(Thread.java:745)
> 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(TabletServerBatchReader.java:91)
> 	at org.apache.accumulo.test.randomwalk.image.ScanMeta.visit(ScanMeta.java:87)
> 	at org.apache.accumulo.test.randomwalk.Module$1.call(Module.java:280)
> 	at org.apache.accumulo.test.randomwalk.Module$1.call(Module.java:275)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47)
> 	at org.apache.accumulo.core.util.LoggingRunnable.run(LoggingRunnable.java:34)
> 	... 1 more
> {noformat}
> 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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