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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13090) Progress heartbeats for long running scanners
Date Thu, 19 Mar 2015 20:08:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14370017#comment-14370017
] 

Hadoop QA commented on HBASE-13090:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12705648/HBASE-13090-v4.patch
  against master branch at commit 27cf749af884edae55454c885c7fb066f0a33c79.
  ATTACHMENT ID: 12705648

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

    {color:green}+1 tests included{color}.  The patch appears to include 32 new or modified
tests.

    {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.1 2.5.2 2.6.0)

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

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

    {color:red}-1 javadoc{color}.  The javadoc tool appears to have generated 5 warning messages.

                {color:red}-1 checkstyle{color}.  The applied patch generated 1919 checkstyle
errors (more than the master's current 1917 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:
    +              new java.lang.String[] { "Region", "Scan", "ScannerId", "NumberOfRows",
"CloseScanner", "NextCallSeq", "ClientHandlesPartials", "ClientHandlesHeartbeats", });
+              new java.lang.String[] { "CellsPerResult", "ScannerId", "MoreResults", "Ttl",
"Results", "Stale", "PartialFlagPerResult", "HeartbeatMessage", });
+    public NextState next(List<Cell> outResults, int batchLimit, long sizeLimit) throws
IOException {

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

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.regionserver.TestHRegion

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-rest.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/checkstyle-aggregate.html

                Javadoc warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//artifact/patchprocess/patchJavadocWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/13319//console

This message is automatically generated.

> Progress heartbeats for long running scanners
> ---------------------------------------------
>
>                 Key: HBASE-13090
>                 URL: https://issues.apache.org/jira/browse/HBASE-13090
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Andrew Purtell
>            Assignee: Jonathan Lawlor
>         Attachments: HBASE-13090-v1.patch, HBASE-13090-v2.patch, HBASE-13090-v3.patch,
HBASE-13090-v3.patch, HBASE-13090-v4.patch
>
>
> It can be necessary to set very long timeouts for clients that issue scans over large
regions when all data in the region might be filtered out depending on scan criteria. This
is a usability concern because it can be hard to identify what worst case timeout to use until
scans are occasionally/intermittently failing in production, depending on variable scan criteria.
It would be better if the client-server scan protocol can send back periodic progress heartbeats
to clients as long as server scanners are alive and making progress.
> This is related but orthogonal to streaming scan (HBASE-13071). 



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