[ https://issues.apache.org/jira/browse/HBASE-3171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13573825#comment-13573825 ]
Hadoop QA commented on HBASE-3171: ---------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12568322/HBASE-3171-v3.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 24 new or modified tests. {color:green}+1 hadoop2.0{color}. The patch compiles against the hadoop 2.0 profile. {color:red}-1 javadoc{color}. The javadoc tool appears to have generated 2 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.TestHRegionInfo Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/4372//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 > > > 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira