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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10595) HBaseAdmin.getTableDescriptor can wrongly get the previous table's TableDescriptor even after the table dir in hdfs is removed
Date Fri, 28 Feb 2014 15:12:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13915847#comment-13915847

Hadoop QA commented on HBASE-10595:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .
  ATTACHMENT ID: 12631729

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 9 new or modified

    {color:green}+1 hadoop1.0{color}.  The patch compiles against the hadoop 1.0 profile.

    {color:green}+1 hadoop1.1{color}.  The patch compiles against the hadoop 1.1 profile.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:red}-1 findbugs{color}.  The patch appears to introduce 2 new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn site goal succeeds with this patch.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/8851//console

This message is automatically generated.

> HBaseAdmin.getTableDescriptor can wrongly get the previous table's TableDescriptor even
after the table dir in hdfs is removed
> ------------------------------------------------------------------------------------------------------------------------------
>                 Key: HBASE-10595
>                 URL: https://issues.apache.org/jira/browse/HBASE-10595
>             Project: HBase
>          Issue Type: Sub-task
>          Components: master, util
>            Reporter: Feng Honghua
>            Assignee: Feng Honghua
>         Attachments: HBASE-10595-trunk_v1.patch, HBASE-10595-trunk_v2.patch, HBASE-10595-trunk_v3.patch,
> When a table dir (in hdfs) is removed(by outside), HMaster will still return the cached
TableDescriptor to client for getTableDescriptor request.
> On the contrary, HBaseAdmin.listTables() is handled correctly in current implementation,
for a table whose table dir in hdfs is removed by outside, getTableDescriptor can still retrieve
back a valid (old) table descriptor, while listTables says it doesn't exist, this is inconsistent
> The reason for this bug is because HMaster (via FSTableDescriptors) doesn't check if
the table dir exists for getTableDescriptor() request, (while it lists all existing table
dirs(not firstly respects cache) and returns accordingly for listTables() request)
> When a table is deleted via deleteTable, the cache will be cleared after the table dir
and tableInfo file is removed, listTables/getTableDescriptor inconsistency should be transient(though
still exists, when table dir is removed while cache is not cleared) and harder to expose

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