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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17376) ClientAsyncPrefetchScanner may fail due to too many rows
Date Tue, 27 Dec 2016 03:52:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15779527#comment-15779527
] 

Hudson commented on HBASE-17376:
--------------------------------

SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #2205 (See [https://builds.apache.org/job/HBase-Trunk_matrix/2205/])
HBASE-17376 ClientAsyncPrefetchScanner may fail due to too many rows (tedyu: rev e18e9a22daf32306f966641ea02a72fca96dee32)
* (edit) hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannersFromClientSide.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientAsyncPrefetchScanner.java


> ClientAsyncPrefetchScanner may fail due to too many rows
> --------------------------------------------------------
>
>                 Key: HBASE-17376
>                 URL: https://issues.apache.org/jira/browse/HBASE-17376
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0
>            Reporter: ChiaPing Tsai
>            Assignee: ChiaPing Tsai
>             Fix For: 2.0.0
>
>         Attachments: HBASE.17376.v0.patch, HBASE.17376.v1.patch
>
>
> ClientAsyncPrefetchScanner uses a fixed capacity LinkedBlockingQueue, so it may throw
“queue full”. For example, scan with infinite caching or extra data from observer.
> {noformat}
>   @Override
>   protected void initCache() {
>     // concurrent cache
>     cacheCapacity = calcCacheCapacity();
>     cache = new LinkedBlockingQueue<Result>(cacheCapacity);
>     cacheSizeInBytes = new AtomicLong(0);
>     exceptionsQueue = new ConcurrentLinkedQueue<Exception>();
>     prefetchRunnable = new PrefetchRunnable();
>     prefetchRunning = new AtomicBoolean(false);
>     closingThreadId = new AtomicLong(NO_THREAD);
>   }
> {noformat}



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