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Ship it!


Some minor nits and a few general questions just asking if the behavior is 
expected.


ambari-server/src/main/java/org/apache/ambari/server/api/services/AmbariMetaInfo.java
<https://reviews.apache.org/r/32414/#comment125671>

    Any reason this is a Boolean object? Seems like it could cause NPEs in when 
used by other areas of code.



ambari-server/src/main/java/org/apache/ambari/server/api/services/AmbariMetaInfo.java
<https://reviews.apache.org/r/32414/#comment125674>

    Same as above; any reason this can't be a primitive to avoid NPEs and null 
checks?



ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java
<https://reviews.apache.org/r/32414/#comment125675>

    Slightly confusing; the first time I read this, I thought these were the 
services that need a restart. But they are just the ones that are rack 
sensitive. Can we rename this Set to something like `rackSenstiveServices`



ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/scripts/hdfs_namenode.py
<https://reviews.apache.org/r/32414/#comment125676>

    Correct global imports.



ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/scripts/hdfs_namenode.py
<https://reviews.apache.org/r/32414/#comment125677>

    If I'm reading this right, it's going to generate a new topology 
script/mapping every time NN is started. Is that what we want even if the 
environment is not rack aware?


- Jonathan Hurley


On March 23, 2015, 4:35 p.m., Tom Beerbower wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/32414/
> -----------------------------------------------------------
> 
> (Updated March 23, 2015, 4:35 p.m.)
> 
> 
> Review request for Ambari, Jonathan Hurley, John Speidel, and Nate Cole.
> 
> 
> Bugs: AMBARI-6466
>     https://issues.apache.org/jira/browse/AMBARI-6466
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> 1. Generate topology script used by Hadoop to determine the rack location of 
> nodes.
> 2. Update core-site.xml to point to script.
> 3. Provide mechanism for marking services that need restart when host rack 
> info changes.
> 4. React to host resource rack changes to ...
>     a. mark services needing restart.
>     b. update host/rack data for topology script
> 
> 
> Diffs
> -----
> 
>   ambari-agent/src/main/python/ambari_agent/CustomServiceOrchestrator.py 
> 8c21503 
>   
> ambari-server/src/main/java/org/apache/ambari/server/api/services/AmbariMetaInfo.java
>  982f10f 
>   
> ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementController.java
>  6d35a36 
>   
> ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java
>  98390fd 
>   
> ambari-server/src/main/java/org/apache/ambari/server/controller/internal/HostResourceProvider.java
>  3a359e5 
>   
> ambari-server/src/main/java/org/apache/ambari/server/stack/ServiceModule.java 
> ab1ede5 
>   ambari-server/src/main/java/org/apache/ambari/server/state/ServiceInfo.java 
> 939a496 
>   ambari-server/src/main/java/org/apache/ambari/server/utils/StageUtils.java 
> de84f35 
>   
> ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/configuration/core-site.xml
>  c0cd6b3 
>   
> ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/metainfo.xml 
> 916d9b0 
>   
> ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/files/topology_script.py
>  PRE-CREATION 
>   
> ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/scripts/hdfs_namenode.py
>  615dd54 
>   
> ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/scripts/params.py
>  d20e8e0 
>   
> ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/templates/topology_mappings.data.j2
>  PRE-CREATION 
>   
> ambari-server/src/main/resources/common-services/YARN/2.1.0.2.0/metainfo.xml 
> 974165c 
>   
> ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
>  8f7c199 
>   
> ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerImplTest.java
>  208218c 
>   
> ambari-server/src/test/java/org/apache/ambari/server/state/ServiceInfoTest.java
>  PRE-CREATION 
>   ambari-server/src/test/python/stacks/2.0.6/HDFS/test_namenode.py 1919958 
>   ambari-server/src/test/python/stacks/2.0.6/configs/default.json d1701bd 
>   
> ambari-server/src/test/python/stacks/2.0.6/configs/ha_bootstrap_active_node.json
>  b3e61bc 
>   
> ambari-server/src/test/python/stacks/2.0.6/configs/ha_bootstrap_standby_node.json
>  4bbb0f5 
>   ambari-server/src/test/python/stacks/2.0.6/configs/ha_default.json 652ca7b 
>   ambari-server/src/test/python/stacks/2.0.6/configs/ha_secured.json 6c06f35 
>   ambari-server/src/test/python/stacks/2.0.6/configs/secured.json b0b0c04 
>   
> ambari-server/src/test/resources/stacks/HDP/2.0.7/services/HDFS/metainfo.xml 
> 69f13e9 
> 
> Diff: https://reviews.apache.org/r/32414/diff/
> 
> 
> Testing
> -------
> 
> Manual testing to verify that topology script is configured and available, 
> services (HDFS, MAPRED2) are marked for restart when a change is made to host 
> rack information, and topology script can be invoked to get updated rack 
> information.
> 
> New unit tests added.
> 
> All unit tests pass.
> 
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] BUILD SUCCESS
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] Total time: 33:36 min
> [INFO] Finished at: 2015-03-23T15:47:10-04:00
> [INFO] Final Memory: 43M/600M
> [INFO] 
> ------------------------------------------------------------------------
> 
> 
> Thanks,
> 
> Tom Beerbower
> 
>

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