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ambari-server/src/main/java/org/apache/ambari/server/state/stack/upgrade/ClusterGrouping.java
Line 194 (original), 204 (patched)
<https://reviews.apache.org/r/57792/#comment242743>

    Log a warning here that we didn't catch the missed task type?



ambari-server/src/main/java/org/apache/ambari/server/state/stack/upgrade/ParallelScheduler.java
Lines 56-57 (patched)
<https://reviews.apache.org/r/57792/#comment242744>

    I thought I had flagged this before and you agreed it was a problem - 
doesn't this mean get a list of sets with each set containing only 1 item? The 
returned collection should essentially be a singleton list which contains a 
single set of all hosts.


- Jonathan Hurley


On March 23, 2017, 9:29 p.m., Alejandro Fernandez wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/57792/
> -----------------------------------------------------------
> 
> (Updated March 23, 2017, 9:29 p.m.)
> 
> 
> Review request for Ambari, Jonathan Hurley, Nate Cole, Sumit Mohanty, and Sid 
> Wagle.
> 
> 
> Bugs: AMBARI-20490
>     https://issues.apache.org/jira/browse/AMBARI-20490
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> On large-scale clusters over 1000 nodes, performance during Express Upgrade 
> can be very slow and it takes more time to fix potential errors.
> We can remedy these with the following fixes:
> 
> * "hdp-select set all" is currently ran in the ClusterGroup with a single 
> stage instead of batching. This can cause Ambari Server to be the bottleneck 
> when processing 1000+ requests. Allow the execute-stage inside a ClusterGroup 
> to use batching.
> 
> * If some hosts have symlinks or dirs that don't belong in /usr/hdp/ then it 
> will prevent the hosts from running "hdp-select versions". We can find these 
> problematic hosts with an alert.
> 
> * There is currently no upgrade path from HDP 2.2 directly to 2.5. Doing a 
> 2-step upgrade is very time consuming (only for branch 2.4 since HDP 2.2 no 
> longer supported in Ambari 2.5).
> 
> 
> Diffs
> -----
> 
>   
> ambari-common/src/main/python/resource_management/libraries/functions/stack_select.py
>  20b4cbd 
>   
> ambari-server/src/main/java/org/apache/ambari/server/checks/AtlasPresenceCheck.java
>  8556436 
>   
> ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UpgradeResourceProvider.java
>  ca9ce07 
>   
> ambari-server/src/main/java/org/apache/ambari/server/state/UpgradeHelper.java 
> ee5451f 
>   
> ambari-server/src/main/java/org/apache/ambari/server/state/stack/upgrade/ClusterGrouping.java
>  c45ec24 
>   
> ambari-server/src/main/java/org/apache/ambari/server/state/stack/upgrade/Grouping.java
>  8003223 
>   
> ambari-server/src/main/java/org/apache/ambari/server/state/stack/upgrade/ParallelScheduler.java
>  6004a12 
>   
> ambari-server/src/main/java/org/apache/ambari/server/state/stack/upgrade/StageWrapper.java
>  669d50f 
>   
> ambari-server/src/main/java/org/apache/ambari/server/state/stack/upgrade/StageWrapperBuilder.java
>  3cf3f8b 
>   ambari-server/src/main/resources/alerts.json 2559b3a 
>   
> ambari-server/src/main/resources/common-services/LOGSEARCH/0.5.0/configuration/logfeeder-properties.xml
>  ca14c1f 
>   ambari-server/src/main/resources/host_scripts/alert_version_select.py 
> PRE-CREATION 
>   
> ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/nonrolling-upgrade-2.3.xml
>  28ca939 
>   
> ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/nonrolling-upgrade-2.4.xml
>  9aff1a9 
>   
> ambari-server/src/main/resources/stacks/HDP/2.3/upgrades/nonrolling-upgrade-2.5.xml
>  adccac0 
>   
> ambari-server/src/main/resources/stacks/HDP/2.4/upgrades/nonrolling-upgrade-2.4.xml
>  3c0104b 
>   
> ambari-server/src/main/resources/stacks/HDP/2.4/upgrades/nonrolling-upgrade-2.5.xml
>  cd63651 
>   
> ambari-server/src/main/resources/stacks/HDP/2.5/upgrades/nonrolling-upgrade-2.5.xml
>  6f7fbd0 
>   
> ambari-server/src/main/resources/stacks/HDP/2.5/upgrades/nonrolling-upgrade-2.6.xml
>  063b362 
>   
> ambari-server/src/main/resources/stacks/HDP/2.6/upgrades/nonrolling-upgrade-2.6.xml
>  4a641ec 
>   ambari-server/src/main/resources/upgrade-pack.xsd 1f11aa1 
>   
> ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
>  f1af66f 
>   
> ambari-server/src/test/java/org/apache/ambari/server/controller/AmbariManagementControllerTest.java
>  bf6c41a 
>   
> ambari-server/src/test/java/org/apache/ambari/server/controller/internal/UpgradeResourceProviderTest.java
>  3e70989 
>   
> ambari-server/src/test/java/org/apache/ambari/server/metadata/AgentAlertDefinitionsTest.java
>  cbc5e69 
>   
> ambari-server/src/test/java/org/apache/ambari/server/state/UpgradeHelperTest.java
>  8e5ad0a 
>   
> ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_test_batch.xml
>  PRE-CREATION 
>   
> ambari-server/src/test/resources/stacks/HDP/2.1.1/upgrades/upgrade_to_new_stack.xml
>  fe387f3 
> 
> 
> Diff: https://reviews.apache.org/r/57792/diff/8/
> 
> 
> Testing
> -------
> 
> mvn clean test
> 
> 
> Thanks,
> 
> Alejandro Fernandez
> 
>

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