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https://issues.apache.org/jira/browse/HBASE-3171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13575034#comment-13575034
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Hadoop QA commented on HBASE-3171:
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{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12568664/HBASE-3171-v4.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 51 new
or modified tests.
{color:green}+1 hadoop2.0{color}. The patch compiles against the hadoop
2.0 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:green}+1 findbugs{color}. The patch does not introduce any 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:red}-1 lineLengths{color}. The patch introduces lines longer than
100
{color:red}-1 core tests{color}. The patch failed these unit tests:
org.apache.hadoop.hbase.regionserver.TestStoreFileBlockCacheSummary
org.apache.hadoop.hbase.catalog.TestMetaMigrationConvertingToPB
org.apache.hadoop.hbase.rest.TestStatusResource
org.apache.hadoop.hbase.master.TestMasterMetrics
org.apache.hadoop.hbase.catalog.TestMetaReaderEditor
org.apache.hadoop.hbase.catalog.TestCatalogTracker
{color:red}-1 core zombie tests{color}. There are 2 zombie test(s):
at
org.apache.hadoop.hbase.master.TestMasterNoCluster.testCatalogDeploys(TestMasterNoCluster.java:329)
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/4391//console
This message is automatically generated.
> Drop ROOT and instead store META location(s) directly in ZooKeeper
> ------------------------------------------------------------------
>
> Key: HBASE-3171
> URL: https://issues.apache.org/jira/browse/HBASE-3171
> Project: HBase
> Issue Type: Improvement
> Components: Client, master, regionserver, Zookeeper
> Reporter: Jonathan Gray
> Attachments: HBASE-3171.patch, HBASE-3171-v2.patch,
> HBASE-3171-v3.patch, HBASE-3171-v4.patch
>
>
> Rather than storing the ROOT region location in ZooKeeper, going to ROOT, and
> reading the META location, we should just store the META location directly in
> ZooKeeper.
> The purpose of the root region from the bigtable paper was to support
> multiple meta regions. Currently, we explicitly only support a single meta
> region, so the translation from our current code of a single root location to
> a single meta location will be very simple. Long-term, it seems reasonable
> that we could store several meta region locations in ZK. There's been some
> discussion in HBASE-1755 about actually moving META into ZK, but I think this
> jira is a good step towards taking some of the complexity out of how we have
> to deal with catalog tables everywhere.
> As-is, a new client already requires ZK to get the root location, so this
> would not change those requirements in any way.
> The primary motivation for this is to simplify things like CatalogTracker.
> The way we can handle root in that class is really simple but the tracking of
> meta is difficulty and a bit hacky. This hack on tracking of the meta
> location is what caused one of the bugs over in HBASE-3159.
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