[jira] [Created] (FLINK-3203) Python API crashing when run in OGS

["Omar Alvarez (JIRA)" <ji...@apache.org>]

Omar Alvarez created FLINK-3203:
-----------------------------------

             Summary: Python API crashing when run in OGS
                 Key: FLINK-3203
                 URL: https://issues.apache.org/jira/browse/FLINK-3203
             Project: Flink
          Issue Type: Bug
          Components: Python API
    Affects Versions: 0.10.0
         Environment: Rocks 6.1 SP1, CentOS release 6.7 (2.6.32-573.7.1.el6.x86_64), java/oraclejdk/1.8.0_45, Python 2.6.6
            Reporter: Omar Alvarez


When trying to execute the Python example without HDFS, the FlatMap fails with the following error:

{code:title=Bar.java|borderStyle=solid}
01/05/2016 13:09:38     Job execution switched to status RUNNING.
01/05/2016 13:09:38     DataSource (ValueSource)(1/1) switched to SCHEDULED
01/05/2016 13:09:38     DataSource (ValueSource)(1/1) switched to DEPLOYING
01/05/2016 13:09:38     DataSource (ValueSource)(1/1) switched to RUNNING
01/05/2016 13:09:38     MapPartition (PythonFlatMap -> PythonCombine)(1/1) switched to SCHEDULED
01/05/2016 13:09:38     MapPartition (PythonFlatMap -> PythonCombine)(1/1) switched to DEPLOYING
01/05/2016 13:09:38     DataSource (ValueSource)(1/1) switched to FINISHED
01/05/2016 13:09:38     MapPartition (PythonFlatMap -> PythonCombine)(1/1) switched to RUNNING
01/05/2016 13:09:38     MapPartition (PythonFlatMap -> PythonCombine)(1/1) switched to FAILED
java.lang.Exception: The user defined 'open()' method caused an exception: An error occurred while copying the file.
        at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:484)
        at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:354)
        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:584)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: An error occurred while copying the file.
        at org.apache.flink.api.common.cache.DistributedCache.getFile(DistributedCache.java:78)
       	at org.apache.flink.languagebinding.api.java.python.streaming.PythonStreamer.startPython(PythonStreamer.java:68)
       	at org.apache.flink.languagebinding.api.java.python.streaming.PythonStreamer.setupProcess(PythonStreamer.java:58)
       	at org.apache.flink.languagebinding.api.java.common.streaming.Streamer.open(Streamer.java:67)
       	at org.apache.flink.languagebinding.api.java.python.functions.PythonMapPartition.open(PythonMapPartition.java:47)
       	at org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36)
       	at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:480)
       	... 3 more
Caused by: java.io.FileNotFoundException: File file:/tmp/flink does not exist or the user running Flink ('omar.alvarez') has insufficient permissions to access it.
       	at org.apache.flink.core.fs.local.LocalFileSystem.getFileStatus(LocalFileSystem.java:107)
       	at org.apache.flink.runtime.filecache.FileCache.copy(FileCache.java:242)
       	at org.apache.flink.runtime.filecache.FileCache$CopyProcess.call(FileCache.java:322)
       	at org.apache.flink.runtime.filecache.FileCache$CopyProcess.call(FileCache.java:306)
       	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
       	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
       	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
       	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
       	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
       	... 1 more
{code}

It is important to mention that I am using modified Flink cluster launch scripts to use the OGS engine. The modified scripts and usage case can be found in https://github.com/omaralvarez/flink-OGS-GE.

The same example in the Java API works correctly, and the user has sufficient permissions to write the file. If use interactive nodes instead of the qsub command to run the example it does not fail.





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