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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12123) Failed assertion in BucketCache after 11331
Date Tue, 30 Sep 2014 22:44:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153917#comment-14153917
] 

Nick Dimiduk commented on HBASE-12123:
--------------------------------------

This patch works as intended. Conveniently, it applies across 0.98+.

> Failed assertion in BucketCache after 11331
> -------------------------------------------
>
>                 Key: HBASE-12123
>                 URL: https://issues.apache.org/jira/browse/HBASE-12123
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>            Reporter: Enis Soztutar
>            Assignee: Nick Dimiduk
>             Fix For: 2.0.0, 0.98.7, 0.99.1
>
>         Attachments: 12123.patch
>
>
> As reported by [~enis]
> We have seen this in one of the test runs: 
> {code}
> 2014-09-26 05:31:19,788 WARN  [main-BucketCacheWriter-2] bucket.BucketCache: Failed doing
drain
> java.lang.AssertionError
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$RAMQueueEntry.writeToCache(BucketCache.java:1239)
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$WriterThread.doDrain(BucketCache.java:773)
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$WriterThread.run(BucketCache.java:731)
>   at java.lang.Thread.run(Thread.java:745)
> 2014-09-26 05:31:19,925 INFO  [main-BucketCacheWriter-2] bucket.BucketCache: main-BucketCacheWriter-2
exiting, cacheEnabled=true
> 2014-09-26 05:31:19,838 WARN  [main-BucketCacheWriter-1] bucket.BucketCache: Failed doing
drain
> java.lang.AssertionError
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$RAMQueueEntry.writeToCache(BucketCache.java:1239)
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$WriterThread.doDrain(BucketCache.java:773)
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$WriterThread.run(BucketCache.java:731)
>   at java.lang.Thread.run(Thread.java:745)
> 2014-09-26 05:31:19,791 WARN  [main-BucketCacheWriter-0] bucket.BucketCache: Failed doing
drain
> java.lang.AssertionError
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$RAMQueueEntry.writeToCache(BucketCache.java:1239)
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$WriterThread.doDrain(BucketCache.java:773)
>   at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache$WriterThread.run(BucketCache.java:731)
>   at java.lang.Thread.run(Thread.java:745)
> 2014-09-26 05:31:19,926 INFO  [main-BucketCacheWriter-0] bucket.BucketCache: main-BucketCacheWriter-0
exiting, cacheEnabled=true
> 2014-09-26 05:31:19,926 INFO  [main-BucketCacheWriter-1] bucket.BucketCache: main-BucketCacheWriter-1
exiting, cacheEnabled=true
> {code}
> We are still running with assertions on in tests, and this block is failing the assertion.
Seems important: 
> {code}
>         if (data instanceof HFileBlock) {
>           ByteBuffer sliceBuf = ((HFileBlock) data).getBufferReadOnlyWithHeader();
>           sliceBuf.rewind();
>           assert len == sliceBuf.limit() + HFileBlock.EXTRA_SERIALIZATION_SPACE;
> {code}



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