[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-07-03 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13405790#comment-13405790
 ] 

Hudson commented on HBASE-6226:
---

Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #78 (See 
[https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/78/])
HBASE-6226 move DataBlockEncoding and related classes to hbase-common 
module (Revision 1356590)

 Result = FAILURE
stack : 
Files : 
* /hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding
* 
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.java
* 
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoding.java
* 
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDecodingContext.java
* 
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockEncodingContext.java
* /hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hfile
* 
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockType.java
* 
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hfile/Compression.java
* 
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hfile/ReusableStreamGzipCodec.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoding.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDecodingContext.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDefaultDecodingContext.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockEncodingContext.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockType.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/Compression.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlock.java
* 
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/ReusableStreamGzipCodec.java


 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: 6226-suggestion.txt, HBASE-6226-v1.patch, 
 HBASE-6226-v2.patch, HBASE-6226-v3.patch, HBASE-6226-v4.patch, 
 HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-07-02 Thread Matt Corgan (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13405166#comment-13405166
 ] 

Matt Corgan commented on HBASE-6226:


Should Hadoop QA have posted a result for this one Stack?

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: 6226-suggestion.txt, HBASE-6226-v1.patch, 
 HBASE-6226-v2.patch, HBASE-6226-v3.patch, HBASE-6226-v4.patch, 
 HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-07-02 Thread Hadoop QA (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13405603#comment-13405603
 ] 

Hadoop QA commented on HBASE-6226:
--

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12534126/HBASE-6226-v4.patch
  against trunk revision .

+1 @author.  The patch does not contain any @author tags.

-1 tests included.  The patch doesn't appear to include any new or modified 
tests.
Please justify why no new tests are needed for this 
patch.
Also please list what manual steps were performed to 
verify this patch.

+1 hadoop2.0.  The patch compiles against the hadoop 2.0 profile.

+1 javadoc.  The javadoc tool did not generate any warning messages.

-1 javac.  The applied patch generated 5 javac compiler warnings (more than 
the trunk's current 4 warnings).

-1 findbugs.  The patch appears to introduce 7 new Findbugs (version 1.3.9) 
warnings.

+1 release audit.  The applied patch does not increase the total number of 
release audit warnings.

 -1 core tests.  The patch failed these unit tests:
   
org.apache.hadoop.hbase.coprocessor.TestRowProcessorEndpoint
  org.apache.hadoop.hbase.io.hfile.TestForceCacheImportantBlocks

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2314//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2314//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2314//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2314//console

This message is automatically generated.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: 6226-suggestion.txt, HBASE-6226-v1.patch, 
 HBASE-6226-v2.patch, HBASE-6226-v3.patch, HBASE-6226-v4.patch, 
 HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-30 Thread stack (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13404432#comment-13404432
 ] 

stack commented on HBASE-6226:
--

Matt I put some review up on phabricator.  Good stuff.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: 6226-suggestion.txt, HBASE-6226-v1.patch, 
 HBASE-6226-v2.patch, HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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If you think it was sent incorrectly, please contact your JIRA administrators: 
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-30 Thread Matt Corgan (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13404618#comment-13404618
 ] 

Matt Corgan commented on HBASE-6226:


Thanks guys.  I left a reply on the encoder instantiation via reflection 
discussion.  repeating here:
{quote}
These encoder implementations are singletons that don't even have any member 
fields, so they are as lightweight as can be. I think it's better they 
fail-fast, though all implementations are currently bundled with hbase so it'd 
be weird that they ever fail.

The only reason i made any change is that they are no longer in the 
compilation-time classpath making the existing instantiation impossible. So one 
concern might be that the implementation could change name or package, but i'm 
thinking unit tests cover us well there.

The weird thing now is that hbase-common knows about different implementations, 
but it mirrors how the Compression implementations are handled. Maybe in the 
future we can consider having the HColumnDescriptor take these fully-qualified 
class names so that different implementations can be plugged without being 
added to this enum, but that's veering off track for this jira.
{quote}

Stack - it looks like Phabricator correctly matches up moved files, but if 
nothing in the file has changed it makes it look like a new file.  Some of your 
comments on that top file are are things that already exist on trunk.  All good 
points, but maybe we can address separately.  

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: 6226-suggestion.txt, HBASE-6226-v1.patch, 
 HBASE-6226-v2.patch, HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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If you think it was sent incorrectly, please contact your JIRA administrators: 
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-30 Thread stack (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13404624#comment-13404624
 ] 

stack commented on HBASE-6226:
--

@Matt Ok.  Lets get issues I note in another JIRA.  Let me retry your v4 
against hadoopqa.  See if same tests fail.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: 6226-suggestion.txt, HBASE-6226-v1.patch, 
 HBASE-6226-v2.patch, HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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If you think it was sent incorrectly, please contact your JIRA administrators: 
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-29 Thread Hadoop QA (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13404395#comment-13404395
 ] 

Hadoop QA commented on HBASE-6226:
--

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12534086/6226-suggestion.txt
  against trunk revision .

+1 @author.  The patch does not contain any @author tags.

-1 tests included.  The patch doesn't appear to include any new or modified 
tests.
Please justify why no new tests are needed for this 
patch.
Also please list what manual steps were performed to 
verify this patch.

+1 hadoop2.0.  The patch compiles against the hadoop 2.0 profile.

+1 javadoc.  The javadoc tool did not generate any warning messages.

-1 javac.  The applied patch generated 5 javac compiler warnings (more than 
the trunk's current 4 warnings).

-1 findbugs.  The patch appears to introduce 6 new Findbugs (version 1.3.9) 
warnings.

+1 release audit.  The applied patch does not increase the total number of 
release audit warnings.

 -1 core tests.  The patch failed these unit tests:
   
org.apache.hadoop.hbase.io.hfile.TestForceCacheImportantBlocks
  org.apache.hadoop.hbase.regionserver.TestServerCustomProtocol
  org.apache.hadoop.hbase.master.TestSplitLogManager

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2299//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2299//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2299//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2299//console

This message is automatically generated.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: 6226-suggestion.txt, HBASE-6226-v1.patch, 
 HBASE-6226-v2.patch, HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Zhihong Ted Yu (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403254#comment-13403254
 ] 

Zhihong Ted Yu commented on HBASE-6226:
---

@Matt:
You should have selected hbase-git as the Repository.

The change to prepareDecoding() looks good.
{code}
+   * @param block HFile block object
+   * @param onDiskBlock on disk bytes to be decoded
+   * @param offset data start offset in onDiskBlock
+   * @throws IOException
+   */
+  public void prepareDecoding(int onDiskSizeWithoutHeader, int 
uncompressedSizeWithoutHeader,
{code}
The javadoc doesn't match parameters.
In HFileBlock.java, there're some white spaces.

Here is one review request: https://reviews.apache.org/r/5643/
Feel free to create your own.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Hadoop QA (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403328#comment-13403328
 ] 

Hadoop QA commented on HBASE-6226:
--

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12533779/HBASE-6226-v2.patch
  against trunk revision .

+1 @author.  The patch does not contain any @author tags.

-1 tests included.  The patch doesn't appear to include any new or modified 
tests.
Please justify why no new tests are needed for this 
patch.
Also please list what manual steps were performed to 
verify this patch.

+1 hadoop2.0.  The patch compiles against the hadoop 2.0 profile.

+1 javadoc.  The javadoc tool did not generate any warning messages.

+1 javac.  The applied patch does not increase the total number of javac 
compiler warnings.

-1 findbugs.  The patch appears to introduce 6 new Findbugs (version 1.3.9) 
warnings.

+1 release audit.  The applied patch does not increase the total number of 
release audit warnings.

 -1 core tests.  The patch failed these unit tests:
   org.apache.hadoop.hbase.master.TestSplitLogManager

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2282//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2282//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2282//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2282//console

This message is automatically generated.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

--
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If you think it was sent incorrectly, please contact your JIRA administrators: 
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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Hadoop QA (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403471#comment-13403471
 ] 

Hadoop QA commented on HBASE-6226:
--

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12533882/HBASE-6226-v3.patch
  against trunk revision .

+1 @author.  The patch does not contain any @author tags.

-1 tests included.  The patch doesn't appear to include any new or modified 
tests.
Please justify why no new tests are needed for this 
patch.
Also please list what manual steps were performed to 
verify this patch.

+1 hadoop2.0.  The patch compiles against the hadoop 2.0 profile.

+1 javadoc.  The javadoc tool did not generate any warning messages.

+1 javac.  The applied patch does not increase the total number of javac 
compiler warnings.

-1 findbugs.  The patch appears to introduce 6 new Findbugs (version 1.3.9) 
warnings.

+1 release audit.  The applied patch does not increase the total number of 
release audit warnings.

+1 core tests.  The patch passed unit tests in .

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2284//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2284//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2284//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/2284//console

This message is automatically generated.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch, 
 HBASE-6226-v3.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Zhihong Ted Yu (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403533#comment-13403533
 ] 

Zhihong Ted Yu commented on HBASE-6226:
---

Thanks for the quick turn around.

Will wait for 2 days to see if Mikhail has further comments.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch, 
 HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Mikhail Bautin (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403568#comment-13403568
 ] 

Mikhail Bautin commented on HBASE-6226:
---

Matt: I have submitted the diff to Phabricator as 
https://reviews.facebook.net/D3891. I will add my comments there.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch, 
 HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Mikhail Bautin (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403572#comment-13403572
 ] 

Mikhail Bautin commented on HBASE-6226:
---

Matt: I have added one comment at https://reviews.facebook.net/D3891

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch, 
 HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Mikhail Bautin (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403574#comment-13403574
 ] 

Mikhail Bautin commented on HBASE-6226:
---

Matt: regarding the Arcanist issue: have you run mvn -Darc initialize? It 
would download and install .arc_jira_lib in your HBase directory. 

Phabricator is a more convenient code review system compared to ReviewBoard or 
reviewing raw patches, because e.g. it correctly identifies renamed files 
(relevant to this particular diff).

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch, 
 HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-28 Thread Matt Corgan (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13403593#comment-13403593
 ] 

Matt Corgan commented on HBASE-6226:


Supporting renamed files would be nice.  I am running the mvn -Darc 
initialize.  Here is the full output:

{code}
mcorgan@wyclef:~/hadoop/hbase$ mvn -Darc initialize
[INFO] Scanning for projects...
[INFO] 
[INFO] Reactor Build Order:
[INFO] 
[INFO] HBase
[INFO] HBase - Common
[INFO] HBase - Server
[INFO] 
[INFO] 
[INFO] Building HBase 0.95-SNAPSHOT
[INFO] 
[INFO] 
[INFO] 
[INFO] Building HBase - Common 0.95-SNAPSHOT
[INFO] 
[INFO] 
[INFO] 
[INFO] Building HBase - Server 0.95-SNAPSHOT
[INFO] 
[INFO] 
[INFO] Reactor Summary:
[INFO] 
[INFO] HBase . SUCCESS [0.063s]
[INFO] HBase - Common  SUCCESS [0.001s]
[INFO] HBase - Server  SUCCESS [0.000s]
[INFO] 
[INFO] BUILD SUCCESS
[INFO] 
[INFO] Total time: 0.313s
[INFO] Finished at: Thu Jun 28 16:47:22 PDT 2012
[INFO] Final Memory: 5M/480M
[INFO] 
mcorgan@wyclef:~/hadoop/hbase$ arc diff --only
Usage Exception: Failed to load phutil library at location '.arc_jira_lib'. 
This library is specified by the phutil_libraries setting in .arcconfig. 
Check that the setting is correct and the library is located in the right place.
mcorgan@wyclef:~/hadoop/hbase$ ..
..: command not found
mcorgan@wyclef:~/hadoop/hbase$ ll
total 396
drwxr--r-x 12 mcorgan mcorgan   4096 Jun 25 14:53 ./
drwxrwxr-x  8 mcorgan mcorgan   4096 Jun 28 15:25 ../
-rw-rw-r--  1 mcorgan mcorgan395 Jun 13 20:06 .arcconfig
drwxrw-r-x  4 mcorgan mcorgan   4096 Jun 25 13:17 bin/
-rw-rw-r--  1 mcorgan mcorgan 261312 Jun 13 20:06 CHANGES.txt
drwxrw-r-x  2 mcorgan mcorgan   4096 Jun 13 20:06 conf/
drwxrw-r-x  2 mcorgan mcorgan   4096 Jun 13 20:06 dev-support/
drwxrw-r-x  5 mcorgan mcorgan   4096 Jun 13 20:06 examples/
drwxrw-r-x  8 mcorgan mcorgan   4096 Jun 28 15:25 .git/
-rw-rw-r--  1 mcorgan mcorgan129 Jun 25 13:31 .gitignore
drwxrw-r-x  5 mcorgan mcorgan   4096 Jun 25 14:53 hbase-common/
drwxrw-r-x  5 mcorgan mcorgan   4096 Jun 28 11:46 hbase-server/
-rw-rw-r--  1 mcorgan mcorgan  11358 Jun 13 20:06 LICENSE.txt
-rw-rw-r--  1 mcorgan mcorgan701 Jun 13 20:06 NOTICE.txt
-rw-rw-r--  1 mcorgan mcorgan  58326 Jun 25 13:17 pom.xml
-rw-rw-r--  1 mcorgan mcorgan368 Jun 13 20:25 .project
-rw-rw-r--  1 mcorgan mcorgan   1358 Jun 13 20:06 README.txt
drwxrw-r-x  2 mcorgan mcorgan   4096 Jun 13 20:25 .settings/
drwxrw-r-x  6 mcorgan mcorgan   4096 Jun 25 14:18 src/
drwxr-xr-x  3 mcorgan mcorgan   4096 Jun 25 14:53 target/
mcorgan@wyclef:~/hadoop/hbase$ 
{code}

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Fix For: 0.96.0

 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch, 
 HBASE-6226-v3.patch, HBASE-6226-v4.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-27 Thread Ted Yu (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13402860#comment-13402860
 ] 

Ted Yu commented on HBASE-6226:
---

Try / for Base Directory on review board. 

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-27 Thread Matt Corgan (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13402862#comment-13402862
 ] 

Matt Corgan commented on HBASE-6226:


i've tried 1) leaving it empty, 2) / (no quotes), and 3)  (empty)

1 gives me a normal error message, and 2 and 3 trigger the something broke

Ted, maybe you can try to upload the v2 patch from this jira to see if you get 
the same error?

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-27 Thread Matt Corgan (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13402871#comment-13402871
 ] 

Matt Corgan commented on HBASE-6226:


sorry, try #3 was /hbase (something broke)

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch, HBASE-6226-v2.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-26 Thread Zhihong Ted Yu (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13401665#comment-13401665
 ] 

Zhihong Ted Yu commented on HBASE-6226:
---

@Matt:
Uploading patch onto https://reviews.apache.org is another option.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-25 Thread Mikhail Bautin (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13400830#comment-13400830
 ] 

Mikhail Bautin commented on HBASE-6226:
---

Hi Matt,

The module breakdown you have described makes sense. Unfortunately, I can't see 
much from the patch because a lot of files are being moved around. Would you 
mind posting it at https://reviews.facebook.com? You need to run mvn -Darc 
initialize, then (assuming you have a local git-svn checkout) run arc diff 
--only when your changes correspond to the latest local commit, copy-paste the 
URL arc gives you into the browser, and fill out some fields such as title and 
summary.

Thanks,
Mikhail


 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-25 Thread Matt Corgan (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13401033#comment-13401033
 ] 

Matt Corgan commented on HBASE-6226:


Hi Mikhail,

I installed arcanist from scratch and haven't used it before.  Do you know how 
to fix this error?

{quote}
Usage Exception: Failed to load phutil library at location '.arc_jira_lib'. 
This library is specified by the phutil_libraries setting in .arcconfig. 
Check that the setting is correct and the library is located in the right place.
{quote}


here are the contents of my hbase/.arcconfig file:
{code}
{
  project_id : hbase,
  conduit_uri : https://reviews.facebook.net/;,
  copyright_holder : Apache Software Foundation,
  phutil_libraries : {
arclib : .arc_jira_lib
  },
  arcanist_configuration : ArcJIRAConfiguration,
  jira_project : HBASE,
  jira_api_url : https://issues.apache.org/jira/si/;,
  lint_engine : JavaLintEngine,
  max_line_length : 100
}
{code}

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-22 Thread Mikhail Bautin (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13399505#comment-13399505
 ] 

Mikhail Bautin commented on HBASE-6226:
---

Data block encoding is a server-side feature, so putting it in hbase-common 
will make it available to clients, right? What is the desired dependency graph 
between hbase-server, hbase-common, and hbase-data_block_encodingX components?

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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[jira] [Commented] (HBASE-6226) move DataBlockEncoding and related classes to hbase-common module

2012-06-22 Thread Matt Corgan (JIRA)

[ 
https://issues.apache.org/jira/browse/HBASE-6226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13399550#comment-13399550
 ] 

Matt Corgan commented on HBASE-6226:


Thanks for looking over it Mikhail.  I've been looking at it from a few 
different angles:

Testing:
DataBlockEncoding is essentially a codec between KeyValues and byte[]'s.  
There is no threading, locking, IO, timeouts, retries, etc.  There shouldn't 
even be exceptions.  It would be nice to isolate the codec logic to minimize 
it's dependencies and to harden it as much as possible through pure unit 
tests, rather than heavyweight integration tests.  We should be able to prove 
the correctness of the codecs and their edge cases without usage of a 
minicluster, etc.  We will still need higher-level tests using the minicluster, 
but the low level tests should be extremely focused on the codec details.  For 
example, I think some of the DeltaEncoders have some pretty complex and fragile 
logic that we could test a little more thoroughly if the testing environment 
were simpler.

Maintenance:
It would be good to eventually separate the codecs like this into a separate 
module than hbase-server.  It will isolate the code and tests so developers 
know that danger lurks inside those modules, and committers can keep a sharp 
eye out for any changes that affect that module.  I'm aiming to make a module 
called hbase-prefix-tree that can hold the pluggable implementation classes for 
the implementation, and it may grow to support trie-encoded block indexes and 
memstores.  That some of the other current HFileBlock codecs go into an 
hbase-codec module even though they don't formally exist yet.

Client:
I haven't brought this up because I don't want to be too starry-eyed, but I 
think it is actually appropriate for the client to make use of the 
DataBlockEncoders to encode KeyValues on-the-fly over the wire.  It brings the 
same cost/benefit trade-off as encoding for disk space or block cache space.  
An even more advanced feature would be to pass entire data blocks over the wire 
for certain use cases (primarily unfiltered scans), and let the client decode 
them, saving a ton of server cpu.  Others have mentioned re-writing the client 
from scratch for various reasons, and I would love to see these encodings built 
in from the start.

Dependency graph:
Stack, Jesse, and I did some brainstorming on the path to modularization, and I 
suggested the separation of the codecs from the hbase-server module.  There's a 
diagram on HBASE-5977.  We would try to extract and encapsulate the logic for 
decoding what's inside each type of HFileBlock, creating a class hierarchy of 
HFileBlock implementations that implement interfaces like BloomChunkBlock.  
From the perspective of hbase-server, everything behind those interfaces is a 
perfectly tested, high-performance black box.

I'm actually proposing that hbase-server cannot see into hbase-codec and that 
hbase-codec cannot see into hbase-server.  They both would see into 
hbase-common where we store the DataBlockEncoding enum and the DataBlockEncoder 
and EncodedSeeker interfaces.  In this case the DataBlockEncoding enum goes 
into the hbase-common module and contains strings pointing to the 
implementation classes, and the implementations are instantiated via 
reflection.  This also sets up a simple framework for additional codecs 
(possibly highly customized to a particular use case) to be developed with 
minimal effect on hbase-server.


Anyway, hopefully that makes sense.  All in all, I see hbase-common as the 
kernel of the project, not simply a code-gateway between client and server.  
It should contain the core interfaces and classes that are fundamental to the 
concept of hbase with the assumption that they are simple enough to be 
thoroughly tested via unit tests.

 move DataBlockEncoding and related classes to hbase-common module
 -

 Key: HBASE-6226
 URL: https://issues.apache.org/jira/browse/HBASE-6226
 Project: HBase
  Issue Type: Improvement
  Components: io, regionserver
Affects Versions: 0.96.0
Reporter: Matt Corgan
Assignee: Matt Corgan
 Attachments: HBASE-6226-v1.patch


 In order to isolate the implementation details of HBASE-4676 (PrefixTrie 
 encoding) and other DataBlockEncoders by putting them in modules, this pulls 
 up the DataBlockEncoding related interfaces into hbase-common.
 No tests are moved in this patch.  The only notable change was trimming a few 
 dependencies on HFileBlock which adds dependencies to much of the 
 regionserver.
 The test suite passes locally for me.
 I tried to keep it as simple as possible... let me know if there are any 
 concerns.

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