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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12213) HFileBlock backed by Array of ByteBuffers
Date Wed, 15 Jul 2015 16:50:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14628345#comment-14628345
] 

ramkrishna.s.vasudevan commented on HBASE-12213:
------------------------------------------------

The test failure seems to be unrelated.
{code}
org.apache.hadoop.hbase.master.TestDistributedLogSplitting.xml : XML document structures must
start and end within the same entity. Nested exception: XML document structures must start
and end within the same entity.
	at org.dom4j.io.SAXReader.read(SAXReader.java:482)
	at org.dom4j.io.SAXReader.read(SAXReader.java:264)
	at hudson.tasks.junit.SuiteResult.parse(SuiteResult.java:123)
	at hudson.tasks.junit.TestResult.parse(TestResult.java:273)
	at hudson.tasks.junit.TestResult.parsePossiblyEmpty(TestResult.java:229)
	at hudson.tasks.junit.TestResult.parse(TestResult.java:164)
	at hudson.tasks.junit.TestResult.parse(TestResult.java:147)
	at hudson.tasks.junit.TestResult.<init>(TestResult.java:123)
	at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:117)
	at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:90)
	at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2474)
	at hudson.remoting.UserRequest.perform(UserRequest.java:118)
	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
	at hudson.remoting.Request$2.run(Request.java:328)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
{code}
Sometime this happens. The test case seems to pass locally.

> HFileBlock backed by Array of ByteBuffers
> -----------------------------------------
>
>                 Key: HBASE-12213
>                 URL: https://issues.apache.org/jira/browse/HBASE-12213
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver, Scanners
>            Reporter: Anoop Sam John
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: HBASE-12213_1.patch, HBASE-12213_10_withBBI.patch, HBASE-12213_11_withBBI.patch,
HBASE-12213_12_withBBI.patch, HBASE-12213_12_withBBI.patch, HBASE-12213_13_withBBI.patch,
HBASE-12213_14_withBBI.patch, HBASE-12213_2.patch, HBASE-12213_4.patch, HBASE-12213_8_withBBI.patch,
HBASE-12213_9_withBBI.patch, HBASE-12213_jmh.zip
>
>
> In L2 cache (offheap) an HFile block might have been cached into multiple chunks of buffers.
If HFileBlock need single BB, we will end up in recreation of bigger BB and copying. Instead
we can make HFileBlock to serve data from an array of BBs.



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