[GitHub] flink issue #2499: [FLINK-4485] close and remove user class loader after job...

2016-09-22 Thread mxm
Github user mxm commented on the issue:

https://github.com/apache/flink/pull/2499
  
Merging after tests pass.


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[GitHub] flink issue #2499: [FLINK-4485] close and remove user class loader after job...

2016-09-22 Thread mxm
Github user mxm commented on the issue:

https://github.com/apache/flink/pull/2499
  
This needed another fix because in some tests we use the system class 
loader instead of a class loader instantiated by the BlobLibraryCacheManager. 
If we close that one, we cause tests to fail. The solution is to close only 
`FlinkUserCodeClassLoader`s.


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[GitHub] flink issue #2499: [FLINK-4485] close and remove user class loader after job...

2016-09-19 Thread StephanEwen
Github user StephanEwen commented on the issue:

https://github.com/apache/flink/pull/2499
  
Looks good to me.

+1 to merge when tests pass


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[GitHub] flink issue #2499: [FLINK-4485] close and remove user class loader after job...

2016-09-16 Thread mxm
Github user mxm commented on the issue:

https://github.com/apache/flink/pull/2499
  
@StephanEwen Yes, it is simple. I just pushed a commit. This now releases 
all temp files after job completion.


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[GitHub] flink issue #2499: [FLINK-4485] close and remove user class loader after job...

2016-09-16 Thread StephanEwen
Github user StephanEwen commented on the issue:

https://github.com/apache/flink/pull/2499
  
What would the fix for the TaskManager look like? Simply explicitly closing 
the UserCodeClassloader, or does it need more?


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[GitHub] flink issue #2499: [FLINK-4485] close and remove user class loader after job...

2016-09-16 Thread mxm
Github user mxm commented on the issue:

https://github.com/apache/flink/pull/2499
  
Thanks! Just a few words to @nielsbasjes who reported the issue. I've 
tested the fix using the test instructions you provided. Even before this fix, 
I could get rid of the temp files by forcing a manual garbage collection on the 
JVM, using `jcmd  GC.run`. However, that only worked once the job meta 
data had been removed from the archive, i.e. it doesn't show up in the web 
interface anymore. With this fix, the class loader is cleared upon job 
completion and the files are immediately removed. `lsof | fgrep blob_` didn't 
show any of these files anymore.

Note, that we don't perform any cleanup on the TaskManager side. There we 
also wind up with some left over files but they don't seem to pile up. It must 
be that the garbage collector can figure out when to clean much earlier. Plus, 
we don't keep a reference to old Task instances like we do for the web 
interface on the JobManager side.

@StephanEwen I'm thinking about adding a similar fix for the TaskManager 
side. What do you think?


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[GitHub] flink issue #2499: [FLINK-4485] close and remove user class loader after job...

2016-09-15 Thread StephanEwen
Github user StephanEwen commented on the issue:

https://github.com/apache/flink/pull/2499
  
Looks food to me.

+1 to merge


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