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From "Jonathan Hurley" <jhur...@hortonworks.com>
Subject Review Request 41562: Unable To Restart HCat Client When Not Colocated With WebHCat Server
Date Fri, 18 Dec 2015 19:38:14 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/41562/
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Review request for Ambari, Alejandro Fernandez, Nate Cole, and Sumit Mohanty.


Bugs: AMBARI-14437
    https://issues.apache.org/jira/browse/AMBARI-14437


Repository: ambari


Description
-------

Errors are encountered while restart Hive HCat client when it is not located on a host which
also has WebHCat daemon.

{code:title=This is good - the pointers have moved for 2.3.4}
root@os-d7-dkezlu-ambari-hv-r-upg-7-re1-5:/usr/hdp/current/hive-webhcat/etc# ls -l /usr/hdp/2.3.4.0-3485/hive-hcatalog/etc
total 4
lrwxrwxrwx 1 root root   33 Dec 18 14:45 hcatalog -> /etc/hive-hcatalog/2.3.4.0-3485/0
drwxr-xr-x 2 root root 4096 Dec 18 14:45 init.d
lrwxrwxrwx 1 root root   32 Dec 18 14:45 webhcat -> /etc/hive-webhcat/2.3.4.0-3485/0
{code}

{code:title=This is bad - current for hcatalog is still 2.3.2, which has the symlink issue}
root@os-d7-dkezlu-ambari-hv-r-upg-7-re1-5:/usr/hdp/current/hive-webhcat/etc# ls -l /usr/hdp/current
| grep hive
lrwxrwxrwx 1 root root 26 Dec 18 15:50 hive-client -> /usr/hdp/2.3.4.0-3485/hive
lrwxrwxrwx 1 root root 26 Dec 18 12:59 hive-metastore -> /usr/hdp/2.3.2.0-2826/hive
lrwxrwxrwx 1 root root 26 Dec 18 12:59 hive-server2 -> /usr/hdp/2.3.2.0-2826/hive
lrwxrwxrwx 1 root root 35 Dec 18 12:59 hive-webhcat -> /usr/hdp/2.3.2.0-2826/hive-hcatalog
{code}

The problem is that {{hcat_client.py}} must write out configs to {{/usr/hdp/current/hive-webhcat/etc/hcatalog}}
but {{hcat_client.py}} doesn't {{hdp-select}} anything.

So that the "current" pointers are never changed. {{hcat_client.py}} should probably {{hdp-select
hive-webhcat}} since there is no {{hcat-client}} in {{hdp-select}}.


Diffs
-----

  ambari-server/src/main/resources/common-services/HIVE/0.12.0.2.0/package/scripts/hcat_client.py
75a37f1 
  ambari-server/src/test/python/stacks/2.0.6/HIVE/test_hcat_client.py 396e6a1 

Diff: https://reviews.apache.org/r/41562/diff/


Testing
-------

mvn clean test

----------------------------------------------------------------------
Total run:853
Total errors:0
Total failures:0
OK

Upgraded cluster with multiple hcat clients not located with other hive components.


Thanks,

Jonathan Hurley


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