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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/46968/
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(Updated May 9, 2016, 6:26 a.m.)


Review request for lens.


Changes
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Fiexd review comment - added back err counter on failing to close file


Bugs: lens-1029
    https://issues.apache.org/jira/browse/lens-1029


Repository: lens


Description
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- Service level persistence isolation. If persisting one service fails, other 
services should still be persisted. 
- Persistence thread to run only in case SERVER_RESTART_ENABLED = true
- Moved form Timer to ScheduledExecutorService. Graceful shutdown of 
ScheduledExecutorService enabled to allow a running persistence task, if any,  
to finish
- Catching Exception instead of IOException to prevent the persistence task 
from dying. 
- using writeObject() instead of writeInt() for automatic null handling.


Diffs (updated)
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lens-query-lib/src/main/java/org/apache/lens/lib/query/AbstractFileFormatter.java
 8c06621 
  
lens-server-api/src/main/java/org/apache/lens/server/api/LensConfConstants.java 
23537cb 
  lens-server/src/main/java/org/apache/lens/server/LensServices.java 48b3e00 
  lens-server/src/main/resources/lensserver-default.xml 1a15658 
  lens-server/src/test/java/org/apache/lens/server/TestServerRestart.java 
1fa61ef 
  src/site/apt/admin/config.apt 5466e7a 
  src/site/apt/admin/deployment.apt b4f4d0a 

Diff: https://reviews.apache.org/r/46968/diff/


Testing
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Relying on exiting test case to check persistence TestServerRestart. 

**mvn test -Dtest=org.apache.lens.server.TestServerRestart#testQueryService**
Running org.apache.lens.server.TestServerRestart
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 206.408 sec - 
in org.apache.lens.server.TestServerRestart

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0


**mvn test -Dtest=org.apache.lens.server.TestServerRestart#testSessionRestart**
Running org.apache.lens.server.TestServerRestart
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 21.711 sec - in 
org.apache.lens.server.TestServerRestart

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0


**Apart from this** 
- Did some local testing for making sure null Integers are persisted using 
writeObject and can be read back as well. 
- Did some local testing to check graceful shutdown of ScheduledExecutorService
Don't think we need a test cases for above two cince its supported out of box 
by java


Thanks,

Puneet Gupta

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