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https://issues.apache.org/jira/browse/HBASE-12751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710173#comment-14710173
]
Hadoop QA commented on HBASE-12751:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12752051/HBASE-12751-v21.patch
against master branch at commit 9334a47d4570f8adfc003f0fb2c5969a88c3bba0.
ATTACHMENT ID: 12752051
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 106
new or modified tests.
{color:red}-1 Anti-pattern{color}. The patch appears to
have anti-pattern where BYTES_COMPARATOR was omitted:
- getRegionInfo(), -1, new TreeMap<byte[], List<Path>>());.
{color:green}+1 hadoop versions{color}. The patch compiles with all
supported hadoop versions (2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.7.0)
{color:red}-1 javac{color}. The applied patch generated 27 javac compiler
warnings (more than the master's current 26 warnings).
{color:green}+1 protoc{color}. The applied patch does not increase the
total number of protoc compiler warnings.
{color:red}-1 javadoc{color}. The javadoc tool appears to have generated 2
warning messages.
{color:red}-1 checkstyle{color}. The applied patch generated
1856 checkstyle errors (more than the master's current 1849 errors).
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) 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 the following lines
longer than 100:
+ final long now, List<UUID> clusterIds, long nonceGroup, long nonce,
MultiVersionConcurrencyControl mvcc) {
+ long logSeqNum, final long now, List<UUID> clusterIds, long nonceGroup,
long nonce, MultiVersionConcurrencyControl mvcc) {
+ long txid = log.append(htd, hri, new WALKey(hri.getEncodedNameAsBytes(),
hri.getTable(), now, mvcc),
+ new WALKey(info.getEncodedNameAsBytes(), htd.getTableName(),
System.currentTimeMillis(), mvcc),
+ new WALKey(hri.getEncodedNameAsBytes(), htd.getTableName(),
System.currentTimeMillis(), mvcc),
+ final WALKey logkey = new WALKey(hri.getEncodedNameAsBytes(),
hri.getTable(), now, mvcc);
{color:green}+1 site{color}. The mvn post-site goal succeeds with this patch.
{color:red}-1 core tests{color}. The patch failed these unit tests:
org.apache.hadoop.hbase.util.TestProcessBasedCluster
org.apache.hadoop.hbase.mapreduce.TestImportExport
org.apache.hadoop.hbase.coprocessor.TestRegionServerObserver
{color:red}-1 core zombie tests{color}. There are 1 zombie test(s):
at
org.apache.hadoop.hbase.regionserver.TestHRegion.testWritesWhileScanning(TestHRegion.java:3799)
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/15224//testReport/
Release Findbugs (version 2.0.3) warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/15224//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/15224//artifact/patchprocess/checkstyle-aggregate.html
Javadoc warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/15224//artifact/patchprocess/patchJavadocWarnings.txt
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/15224//console
This message is automatically generated.
> Allow RowLock to be reader writer
> ---------------------------------
>
> Key: HBASE-12751
> URL: https://issues.apache.org/jira/browse/HBASE-12751
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 2.0.0, 1.3.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Fix For: 2.0.0, 1.3.0
>
> Attachments: HBASE-12751-v1.patch, HBASE-12751-v10.patch,
> HBASE-12751-v10.patch, HBASE-12751-v11.patch, HBASE-12751-v12.patch,
> HBASE-12751-v13.patch, HBASE-12751-v14.patch, HBASE-12751-v15.patch,
> HBASE-12751-v16.patch, HBASE-12751-v17.patch, HBASE-12751-v18.patch,
> HBASE-12751-v19 (1).patch, HBASE-12751-v19.patch, HBASE-12751-v2.patch,
> HBASE-12751-v20.patch, HBASE-12751-v20.patch, HBASE-12751-v21.patch,
> HBASE-12751-v3.patch, HBASE-12751-v4.patch, HBASE-12751-v5.patch,
> HBASE-12751-v6.patch, HBASE-12751-v7.patch, HBASE-12751-v8.patch,
> HBASE-12751-v9.patch, HBASE-12751.patch
>
>
> Right now every write operation grabs a row lock. This is to prevent values
> from changing during a read modify write operation (increment or check and
> put). However it limits parallelism in several different scenarios.
> If there are several puts to the same row but different columns or stores
> then this is very limiting.
> If there are puts to the same column then mvcc number should ensure a
> consistent ordering. So locking is not needed.
> However locking for check and put or increment is still needed.
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