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From "ChiaPing Tsai (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17376) ClientAsyncPrefetchScanner fails due to too many rows
Date Mon, 26 Dec 2016 11:25:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ChiaPing Tsai updated HBASE-17376:
----------------------------------
             Assignee: ChiaPing Tsai
        Fix Version/s: 2.0.0
    Affects Version/s: 2.0.0
               Status: Patch Available  (was: Open)

> ClientAsyncPrefetchScanner fails 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
>
>
> 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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