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From "Chris Trezzo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5071) HFile has a possible cast issue.
Date Thu, 27 Sep 2012 20:07:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13465028#comment-13465028
] 

Chris Trezzo commented on HBASE-5071:
-------------------------------------

Closed and left a comment in the release notes. Thanks Harsh J!
                
> HFile has a possible cast issue.
> --------------------------------
>
>                 Key: HBASE-5071
>                 URL: https://issues.apache.org/jira/browse/HBASE-5071
>             Project: HBase
>          Issue Type: Bug
>          Components: HFile, io
>    Affects Versions: 0.90.0
>            Reporter: Harsh J
>              Labels: hfile
>             Fix For: 0.96.0
>
>
> HBASE-3040 introduced this line originally in HFile.Reader#loadFileInfo(...):
> {code}
> int allIndexSize = (int)(this.fileSize - this.trailer.dataIndexOffset - FixedFileTrailer.trailerSize());
> {code}
> Which on trunk today, for HFile v1 is:
> {code}
> int sizeToLoadOnOpen = (int) (fileSize - trailer.getLoadOnOpenDataOffset() -
>         trailer.getTrailerSize());
> {code}
> This computed (and casted) integer is then used to build an array of the same size. But
if fileSize is very large (>> Integer.MAX_VALUE), then there's an easy chance this can
go negative at some point and spew out exceptions such as:
> {code}
> java.lang.NegativeArraySizeException 
> at org.apache.hadoop.hbase.io.hfile.HFile$Reader.readAllIndex(HFile.java:805) 
> at org.apache.hadoop.hbase.io.hfile.HFile$Reader.loadFileInfo(HFile.java:832) 
> at org.apache.hadoop.hbase.regionserver.StoreFile$Reader.loadFileInfo(StoreFile.java:1003)

> at org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFile.java:382) 
> at org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:438) 
> at org.apache.hadoop.hbase.regionserver.Store.loadStoreFiles(Store.java:267) 
> at org.apache.hadoop.hbase.regionserver.Store.<init>(Store.java:209) 
> at org.apache.hadoop.hbase.regionserver.HRegion.instantiateHStore(HRegion.java:2088)

> at org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:358) 
> at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:2661) 
> at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:2647) 
> {code}
> Did we accidentally limit single region sizes this way?
> (Unsure about HFile v2's structure so far, so do not know if v2 has the same issue.)

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