Hi all,
I'm trying to write a simple Crunch job that outputs a sequence file
consisting of a custom Writable.
The job runs successfully, but the output is not written to the path
that I specify in To.sequenceFile(),
but instead to a Crunch working directory.
This happens when running the job both locally and on my 1-node Hadoop
test cluster,
and it happens both with Crunch 0.6.0 and 0.7.0-SNAPSHOT as of today (38a97e5).
Code snippet:
---
public int run(String[] args) throws IOException {
CommandLine cl = parseCommandLine(args);
Path output = new Path((String) cl.getValue(OUTPUT_OPTION));
int docIdIndex = getColumnIndex(cl, "DocID");
int ldaIndex = getColumnIndex(cl, "LDA");
Pipeline pipeline = new MRPipeline(DbDumpToSeqFile.class);
pipeline.setConfiguration(getConf());
PCollection<String> lines = pipeline.readTextFile((String)
cl.getValue(INPUT_OPTION));
PTable<String, NamedQuantizedVecWritable> vectors = lines.parallelDo(
new ConvertToSeqFileDoFn(docIdIndex, ldaIndex),
tableOf(strings(), writables(NamedQuantizedVecWritable.class)));
vectors.write(To.sequenceFile(output));
PipelineResult res = pipeline.run();
return res.succeeded() ? 0 : 1;
}
---
Log output from local run.
Note how the intended output path "/tmp/foo.seq" is reported in the
execution plan,
is not actually used.
---
2013-06-25 16:19:44.250 java[10755:1203] Unable to load realm info
from SCDynamicStore
2013-06-25 16:19:44 HadoopUtil:185 [INFO] Deleting /tmp/foo.seq
2013-06-25 16:19:44 FileTargetImpl:224 [INFO] Will write output files
to new path: /tmp/foo.seq
2013-06-25 16:19:45 JobClient:741 [WARN] No job jar file set. User
classes may not be found. See JobConf(Class) or
JobConf#setJar(String).
2013-06-25 16:19:45 FileInputFormat:237 [INFO] Total input paths to process : 1
2013-06-25 16:19:45 TrackerDistributedCacheManager:407 [INFO] Creating
MAP in
/tmp/hadoop-florian/mapred/local/archive/4100035173370108016_-456151549_2075417214/file/tmp/crunch-1128974463/p1-work--1596891011522800122
with rwxr-xr-x
2013-06-25 16:19:45 TrackerDistributedCacheManager:447 [INFO] Cached
/tmp/crunch-1128974463/p1/MAP as
/tmp/hadoop-florian/mapred/local/archive/4100035173370108016_-456151549_2075417214/file/tmp/crunch-1128974463/p1/MAP
2013-06-25 16:19:45 TrackerDistributedCacheManager:470 [INFO] Cached
/tmp/crunch-1128974463/p1/MAP as
/tmp/hadoop-florian/mapred/local/archive/4100035173370108016_-456151549_2075417214/file/tmp/crunch-1128974463/p1/MAP
2013-06-25 16:19:45 CrunchControlledJob:303 [INFO] Running job
"com.issuu.mahout.utils.DbDumpToSeqFile:
Text(/Users/florian/data/docdb.first20.txt)+S0+SeqFile(/tmp/foo.seq)"
2013-06-25 16:19:45 CrunchControlledJob:304 [INFO] Job status
available at: http://localhost:8080/
2013-06-25 16:19:45 Task:792 [INFO] Task:attempt_local_0001_m_000000_0
is done. And is in the process of commiting
2013-06-25 16:19:45 LocalJobRunner:321 [INFO]
2013-06-25 16:19:45 Task:945 [INFO] Task attempt_local_0001_m_000000_0
is allowed to commit now
2013-06-25 16:19:45 FileOutputCommitter:173 [INFO] Saved output of
task 'attempt_local_0001_m_000000_0' to
/tmp/crunch-1128974463/p1/output
2013-06-25 16:19:48 LocalJobRunner:321 [INFO]
2013-06-25 16:19:48 Task:904 [INFO] Task 'attempt_local_0001_m_000000_0' done.
---
This crude patch makes the output end up at the right place,
but breaks a lot of other tests.
---
--- a/crunch-core/src/main/java/org/apache/crunch/io/impl/FileTargetImpl.java
+++ b/crunch-core/src/main/java/org/apache/crunch/io/impl/FileTargetImpl.java
@@ -66,7 +66,7 @@ public class FileTargetImpl implements PathTarget {
protected void configureForMapReduce(Job job, Class keyClass, Class
valueClass,
Class outputFormatClass, Path outputPath, String name) {
try {
- FileOutputFormat.setOutputPath(job, outputPath);
+ FileOutputFormat.setOutputPath(job, path);
} catch (Exception e) {
throw new RuntimeException(e);
}
---
Am I doing something wrong, or is this a bug?
Best,
Florian
