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https://issues.apache.org/jira/browse/HBASE-23976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067017#comment-17067017
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Nick Dimiduk commented on HBASE-23976:
--------------------------------------

Even with patch, test failed within 20 cycles :(

> [flakey test] TestVerifyBucketCacheFile
> ---------------------------------------
>
>                 Key: HBASE-23976
>                 URL: https://issues.apache.org/jira/browse/HBASE-23976
>             Project: HBase
>          Issue Type: Test
>          Components: regionserver, test
>    Affects Versions: 3.0.0
>            Reporter: Nick Dimiduk
>            Priority: Major
>
> I see sporadic failures in this test class. Sometimes a failure on 
> {{assertTrue(file.delete())}}, an inconsistent annoyance. However, this one 
> looks more sinister.
> {noformat}
> 2020-03-12 12:11:35,059 ERROR [Time-limited test] bucket.BucketCache(312): 
> Can't restore from 
> file[/Users/ndimiduk/repos/apache/hbase/hbase-server/target/test-data/5e5c5f5f-d5c2-94b2-8ce9-cf561f4f19f7/bucket.persistence]
>  because of 
> java.io.IOException: Mismatch of checksum! The persistent checksum is 
> ���&amp#20;B&amp#16;k�&amp#3;��2�Ӏk, but the calculate checksum is 
> �o���r��w��c��4
>       at 
> org.apache.hadoop.hbase.io.hfile.bucket.PersistentIOEngine.verifyFileIntegrity(PersistentIOEngine.java:55)
>       at 
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.parsePB(BucketCache.java:1158)
>       at 
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.retrieveFromFile(BucketCache.java:1106)
>       at 
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.<init>(BucketCache.java:310)
>       at 
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.<init>(BucketCache.java:258)
>       at 
> org.apache.hadoop.hbase.io.hfile.bucket.TestVerifyBucketCacheFile.testRetrieveFromFile(TestVerifyBucketCacheFile.java:116)
> {noformat}



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