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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-5132) View indexes with different owners but of the same base table can be assigned same ViewIndexId
Date Wed, 13 Feb 2019 03:38:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-5132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16766739#comment-16766739
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Hudson commented on PHOENIX-5132:
---------------------------------

FAILURE: Integrated in Jenkins build Phoenix-4.x-HBase-1.3 #329 (See [https://builds.apache.org/job/Phoenix-4.x-HBase-1.3/329/])
PHOENIX-5132 - View indexes with different owners but of the same base (gjacoby: rev 6239472f96ee13453ed71208d0d5c6ef47765e24)
* (edit) phoenix-core/src/it/java/org/apache/phoenix/end2end/BaseTenantSpecificViewIndexIT.java
* (edit) phoenix-core/src/it/java/org/apache/phoenix/end2end/index/ViewIndexIT.java
* (edit) phoenix-core/src/main/java/org/apache/phoenix/util/MetaDataUtil.java
* (edit) phoenix-core/src/it/java/org/apache/phoenix/end2end/TenantSpecificViewIndexIT.java


> View indexes with different owners but of the same base table can be assigned same ViewIndexId
> ----------------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-5132
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5132
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 5.0.0, 4.14.1
>            Reporter: Geoffrey Jacoby
>            Assignee: Geoffrey Jacoby
>            Priority: Critical
>             Fix For: 4.15.0, 5.1
>
>         Attachments: PHOENIX-5132-4.x-HBase-1.4.patch, PHOENIX-5132-4.x-HBase-1.4.v2.patch,
PHOENIX-5132-repro.patch
>
>
> All indexes on views for a particular base table are stored in the same physical HBase
table. Phoenix distinguishes them by prepending each row key with an encoded short or long
integer called a ViewIndexId. 
> The ViewIndexId is generated by using a sequence to guarantee that each view index id
is unique. Unfortunately, the sequence used follows a convention of [SaltByte, Tenant, Schema,
BaseTable] for its key, which means that there's a separate sequence for each tenant that
owns an index in the view index table. (See MetaDataUtil.getViewIndexSequenceKey) Since all
the sequences start at the same value, collisions are not only possible but likely. 
> I've written a test that confirms the ViewIndexId collision. This means it's very likely
that query results using one view index could mistakenly include rows from another index,
but I haven't confirmed this. 
> All view indexes for a base table, regardless of whether globally or tenant-owned, should
use the same sequence. 



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