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From Josh Wills <jwi...@cloudera.com>
Subject Re: CDH5
Date Wed, 11 Jun 2014 16:41:41 GMT
Hey Kristoffer,

Couldn't reproduce that in my crunch-demo project against my test cluster:

https://github.com/jwills/crunch-demo/tree/cdh5

So I hate asking dumb questions, but are you running against a CDH5 cluster?

J


On Wed, Jun 11, 2014 at 9:11 AM, Josh Wills <josh.wills@gmail.com> wrote:

> That's very odd; let me see if I can reproduce it.
>
> J
>
>
> On Wed, Jun 11, 2014 at 7:23 AM, Kristoffer Sjögren <stoffe@gmail.com>
> wrote:
>
>> Hi
>>
>> Im trying out Crunch on YARN on CDH5 (0.9.0-cdh5.0.0) and get some
>> errors when trying to materialize results (see below). The job itself
>> is super simple.
>>
>> PCollection<String> lines = pipeline.read(new TextFileSource<String>(
>>     new Path("hdfs://....log"), Writables.strings()));
>>
>> lines = lines.parallelDo(new DoFn<String, String>() {
>>   @Override
>>   public void process(String s, Emitter<String> e) {
>>     e.emit(s);
>>   }
>> }, Writables.strings());
>>
>> for (String line : lines.materialize()) {
>>   System.out.println(line);
>> }
>>
>>
>> Seems like there's some kind of sync issue here because I can see the
>> "correct" tmp dir in hdfs. Note that the p index is "p2" in hdfs while
>> the client looks for "p1".
>>
>> -rw-r--r--   1 kristoffersjogren supergroup       1748 2014-06-11
>> 15:36 /tmp/crunch-134908575/p2/MAP
>> drwxr-xr-x   - kristoffersjogren supergroup          0 2014-06-11
>> 15:36 /tmp/crunch-134908575/p2/output
>> -rw-r--r--   1 kristoffersjogren supergroup          0 2014-06-11
>> 15:36 /tmp/crunch-134908575/p2/output/_SUCCESS
>> -rw-r--r--   1 kristoffersjogren supergroup   42898831 2014-06-11
>> 15:36 /tmp/crunch-134908575/p2/output/out0-m-00000
>> -rw-r--r--   1 kristoffersjogren supergroup          0 2014-06-11
>> 15:36 /tmp/crunch-134908575/p2/output/part-m-00000
>>
>>
>> If I try to write directly to HDFS using the following, the job finish
>> successfully, but nothing is written instead?
>>
>> pipeline.write(lines, new TextFileSourceTarget<String>("/user/stoffe",
>> Writables.strings()), WriteMode.OVERWRITE);
>>
>>
>> Any ideas of what might go wrong?
>>
>> Cheers,
>> -Kristoffer
>>
>>
>>
>> Exception in thread "main" java.lang.RuntimeException:
>> org.apache.crunch.CrunchRuntimeException: java.io.IOException: No
>> files found to materialize at: /tmp/crunch-1611606737/p1
>> at mapred.CrunchJob.<init>(CrunchJob.java:36)
>> at mapred.tempjobs.DownloadFiles.<init>(DownloadFiles.java:16)
>> at mapred.tempjobs.DownloadFiles.main(DownloadFiles.java:20)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:483)
>> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
>> Caused by: org.apache.crunch.CrunchRuntimeException:
>> java.io.IOException: No files found to materialize at:
>> /tmp/crunch-1611606737/p1
>> at
>> org.apache.crunch.materialize.MaterializableIterable.materialize(MaterializableIterable.java:79)
>> at
>> org.apache.crunch.materialize.MaterializableIterable.iterator(MaterializableIterable.java:69)
>> at mapred.tempjobs.DownloadFiles.run(DownloadFiles.java:37)
>> at mapred.CrunchJob.run(CrunchJob.java:96)
>> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
>> at mapred.CrunchJob.<init>(CrunchJob.java:34)
>> ... 7 more
>> Caused by: java.io.IOException: No files found to materialize at:
>> /tmp/crunch-1611606737/p1
>> at
>> org.apache.crunch.io.CompositePathIterable.create(CompositePathIterable.java:49)
>> at org.apache.crunch.io.impl.FileSourceImpl.read(FileSourceImpl.java:136)
>> at org.apache.crunch.io.seq.SeqFileSource.read(SeqFileSource.java:43)
>> at
>> org.apache.crunch.io.impl.ReadableSourcePathTargetImpl.read(ReadableSourcePathTargetImpl.java:37)
>> at
>> org.apache.crunch.materialize.MaterializableIterable.materialize(MaterializableIterable.java:76)
>> ... 12 more
>>
>
>


-- 
Director of Data Science
Cloudera <http://www.cloudera.com>
Twitter: @josh_wills <http://twitter.com/josh_wills>

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