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From "Guanghao Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-16460) Can't rebuild the BucketAllocator's data structures when BucketCache use FileIOEngine
Date Mon, 22 Aug 2016 06:09:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-16460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Guanghao Zhang updated HBASE-16460:
-----------------------------------
    Attachment: HBASE-16460-v1.patch

Upload v1 patch. Add VisibleForTesting and delete cache file after unit test.

> Can't rebuild the BucketAllocator's data structures when BucketCache use FileIOEngine
> -------------------------------------------------------------------------------------
>
>                 Key: HBASE-16460
>                 URL: https://issues.apache.org/jira/browse/HBASE-16460
>             Project: HBase
>          Issue Type: Bug
>          Components: BucketCache
>    Affects Versions: 2.0.0, 1.1.6, 1.3.1, 1.2.3, 0.98.22
>            Reporter: Guanghao Zhang
>            Assignee: Guanghao Zhang
>         Attachments: HBASE-16460-v1.patch, HBASE-16460.patch
>
>
> When bucket cache use FileIOEngine, it will rebuild the bucket allocator's data structures
from a persisted map. So it should first read the map from persistence file then use the map
to new a BucketAllocator. But now the code has wrong sequence in retrieveFromFile() method
of BucketCache.java.
> {code}
>       BucketAllocator allocator = new BucketAllocator(cacheCapacity, bucketSizes, backingMap,
realCacheSize);
>       backingMap = (ConcurrentHashMap<BlockCacheKey, BucketEntry>) ois.readObject();
> {code}



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