[jira] [Resolved] (IGNITE-14898) IndexOutOfBoundException in flusher selection logic in GridCacheWriteBehindStore

["Ilya Korol (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-14898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ilya Korol resolved IGNITE-14898.
---------------------------------
    Resolution: Duplicate

> IndexOutOfBoundException in flusher selection logic in GridCacheWriteBehindStore
> --------------------------------------------------------------------------------
>
>                 Key: IGNITE-14898
>                 URL: https://issues.apache.org/jira/browse/IGNITE-14898
>             Project: Ignite
>          Issue Type: Bug
>          Components: general
>    Affects Versions: 2.10
>            Reporter: Ilya Korol
>            Assignee: Ilya Korol
>            Priority: Major
>
> There i a bug in GridCacheWriteBehindStore method for selecting which flusher should be used for current data write by specified key:
> {code:java}
>     /**
>      * Return flusher by by key.
>      *
>      * @param key Key for search.
>      * @return flusher.
>      */
>     private Flusher flusher(K key) {
>         int h, idx;
>         if (flushThreadCntIsPowerOfTwo)
>             idx = ((h = key.hashCode()) ^ (h >>> 16)) & (flushThreadCnt - 1);
>         else
>             idx = ((h = key.hashCode()) ^ (h >>> 16)) % flushThreadCnt;
>         return flushThreads[idx];
>     }
> {code}
> In case when flushThreadCount is not a power of 2 and incoming key.hashCode() < 0 (e.g. for UUID string) we will get IndexOutOfBoundException.
> http://apache-ignite-users.70518.x6.nabble.com/Bug-in-GridCacheWriteBehindStore-td36189.html



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