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Posted to dev@crunch.apache.org by "Josh Wills (JIRA)" <ji...@apache.org> on 2013/11/22 03:34:36 UTC
[jira] [Resolved] (CRUNCH-302) PType OutputMapFn not initialised
when using MemPipeline
[ https://issues.apache.org/jira/browse/CRUNCH-302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Josh Wills resolved CRUNCH-302.
-------------------------------
Resolution: Fixed
Fix Version/s: 0.9.0
Pushed to master. Thanks Christophe!
> PType OutputMapFn not initialised when using MemPipeline
> --------------------------------------------------------
>
> Key: CRUNCH-302
> URL: https://issues.apache.org/jira/browse/CRUNCH-302
> Project: Crunch
> Issue Type: Bug
> Components: Core, IO
> Affects Versions: 0.9.0
> Environment: Crunch synced to 2aa692e5299ee9d775218d4754ae73f3d58beed1
> java version "1.6.0_65"
> Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
> Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)
> Reporter: Christophe Van Gysel
> Assignee: Josh Wills
> Priority: Minor
> Fix For: 0.9.0
>
> Attachments: CRUNCH-302.patch
>
>
> It seems that the OutputMapFns for PTypes aren't initialised when running in local memory. For most types this doesn't matter, but it gets tricky when using a Tuple as a key or value type in a PTable or a PCollection of Tuples; the following exception gets thrown:
> Caused by: java.lang.NullPointerException
> at org.apache.crunch.types.writable.Writables$TupleTWMapFn.map(Writables.java:376)
> at org.apache.crunch.types.writable.Writables$TupleTWMapFn.map(Writables.java:337)
> at org.apache.crunch.impl.mem.MemPipeline.writeSequenceFileFromPTable(MemPipeline.java:270)
> at org.apache.crunch.impl.mem.MemPipeline.write(MemPipeline.java:196)
> at org.apache.crunch.impl.mem.MemPipeline.write(MemPipeline.java:177)
> I'm currently working around this issue by explicitly calling the initialize() method on MapFn, like this:
> table.getPTableType().getValueType().getOutputMapFn().initialize();
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