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https://issues.apache.org/jira/browse/HBASE-22890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16930356#comment-16930356
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Anoop Sam John commented on HBASE-22890:
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Oh I am so sorry for being late in reviewing. But mostly it came good only.
The big concern is whether we will deny the FileIOE create and usage itself
because of existing cached data checksum fails. That is not what we intent to
do.
> Verify the files when RegionServer is starting and BucketCache is in file mode
> ------------------------------------------------------------------------------
>
> Key: HBASE-22890
> URL: https://issues.apache.org/jira/browse/HBASE-22890
> Project: HBase
> Issue Type: Bug
> Components: BucketCache
> Affects Versions: 1.4.6, 1.4.10, 1.3.5
> Reporter: zbq.dean
> Priority: Major
> Fix For: 1.5.0, 1.4.11
>
> Attachments: HBASE-22890.branch-1.0001.patch
>
>
> We use FileIOEngine in BucketCache and have configured
> <hbase.bucketcache.persistent.path>. If the RegionServer is stopped, and the
> cache data file or the backingMap persistence file is deleted or changed
> before the RegionServer is restarted. When restart RegionServer, the
> backingMap and cache data are Inconsistent, and get or scan command will get
> IOException like follows:
> bucket.BucketCache: Failed reading block
> 18951416e2ca4e8bbc11523f4f5ea576_1125745279 from bucket cache
> java.io.IOException: Invalid HFile block magic:
> \x00\x00\x00\x00\x00\x00\x00\x00
> at org.apache.hadoop.hbase.io.hfile.BlockType.parse(BlockType.java:154)
> at org.apache.hadoop.hbase.io.hfile.BlockType.read(BlockType.java:167)
> at org.apache.hadoop.hbase.io.hfile.HFileBlock.<init>(HFileBlock.java:347)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:247)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:226)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.getBlock(BucketCache.java:514)
> ......
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