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https://issues.apache.org/jira/browse/HBASE-12338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14522833#comment-14522833
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Hadoop QA commented on HBASE-12338:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12682489/2.0-0003-Add-ScanPrefetcher-for-client-side-scanning-prefetch.patch
against master branch at commit 1d26d2640734b919d9bf266326e211be0478c711.
ATTACHMENT ID: 12682489
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 7 new
or modified tests.
{color:red}-1 javac{color}. The patch appears to cause mvn compile goal to
fail with Hadoop version 2.4.1.
Compilation errors resume:
[ERROR] COMPILATION ERROR :
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/test/java/org/apache/hadoop/hbase/CopyPerformanceEvaluation.java:[80,14]
cannot find symbol
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/test/java/org/apache/hadoop/hbase/CopyPerformanceEvaluation.java:[105,14]
cannot find symbol
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.2:testCompile
(default-testCompile) on project hbase-server: Compilation failure: Compilation
failure:
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/test/java/org/apache/hadoop/hbase/CopyPerformanceEvaluation.java:[80,14]
cannot find symbol
[ERROR] symbol: method setAutoFlushTo(boolean)
[ERROR] location: variable dstHTable of type
org.apache.hadoop.hbase.client.Table
[ERROR]
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/hbase-server/src/test/java/org/apache/hadoop/hbase/CopyPerformanceEvaluation.java:[105,14]
cannot find symbol
[ERROR] symbol: method flushCommits()
[ERROR] location: variable dstHTable of type
org.apache.hadoop.hbase.client.Table
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please
read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :hbase-server
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/13909//console
This message is automatically generated.
> Client side scanning prefetching.
> ---------------------------------
>
> Key: HBASE-12338
> URL: https://issues.apache.org/jira/browse/HBASE-12338
> Project: HBase
> Issue Type: Improvement
> Components: Client
> Affects Versions: 1.0.0, 2.0.0, 0.98.6.1
> Reporter: Yi Deng
> Assignee: Yi Deng
> Labels: prefetch, results, scanner
> Attachments:
> 0001-Add-ScanPrefetcher-for-client-side-scanning-prefetch.patch,
> 0001-ScanPrefetcher.patch,
> 2.0-0001-Add-ScanPrefetcher-for-client-side-scanning-prefetch.patch,
> 2.0-0002-Add-ScanPrefetcher-for-client-side-scanning-prefetch.patch,
> 2.0-0003-Add-ScanPrefetcher-for-client-side-scanning-prefetch.patch
>
>
> Since server side prefetching was not proved to be a good way to prefetch, we
> need to do it on client side.
> This is a wrapper class that takes any instance of `ResultScanner` as the
> underneath scanning component. The class will schedule the scanning in a
> background thread. There is a buffering queue storing prefetched results,
> whose's length is configurable. The prefetcher will release the thread if the
> queue is full and wait for results to be consumed.
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