[jira] [Created] (FLINK-4674) File Descriptors not being released after Completion of Flink Job Run via Flink Web Portal

["Abey Sam Alex (JIRA)" <ji...@apache.org>]

Abey Sam Alex created FLINK-4674:
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             Summary: File Descriptors not being released after Completion of Flink Job Run via Flink Web Portal
                 Key: FLINK-4674
                 URL: https://issues.apache.org/jira/browse/FLINK-4674
             Project: Flink
          Issue Type: Bug
          Components: Client, JobManager, TaskManager
    Affects Versions: 1.1.2, 1.1.1, 1.0.3, 1.0.2, 1.0.1, 1.1.0
         Environment: RHEL6,7, UBUNTU
            Reporter: Abey Sam Alex


File descriptors utilized by Flink Task Manager are not released even after completion of job.
For releasing all file descriptors, we need to reboot the flink cluster. This causes all Jobs to run succesfully until the OS limit is hit and post which Job keeps failing - 

Error on Flink - 

java.io.IOException: Error opening the Input Split file:/data/Temp/RUN10_1000.csv [84950,1699]: /data/Temp/RUN10_1000.csv (Too many open files)
	at org.apache.flink.api.common.io.FileInputFormat.open(FileInputFormat.java:682)
	at org.apache.flink.api.common.io.DelimitedInputFormat.open(DelimitedInputFormat.java:411)
	at org.apache.flink.api.common.io.DelimitedInputFormat.open(DelimitedInputFormat.java:45)
	at org.apache.flink.runtime.operators.DataSourceTask.invoke(DataSourceTask.java:147)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: /data/Temp/RUN10_1000.csv (Too many open files)
	at java.io.FileInputStream.open0(Native Method)
	at java.io.FileInputStream.open(FileInputStream.java:195)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at org.apache.flink.core.fs.local.LocalDataInputStream.<init>(LocalDataInputStream.java:52)
	at org.apache.flink.core.fs.local.LocalFileSystem.open(LocalFileSystem.java:143)
	at org.apache.flink.api.common.io.FileInputFormat$InputSplitOpenThread.run(FileInputFormat.java:842)




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