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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