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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16644) Errors when reading legit HFile' Trailer on branch 1.3
Date Fri, 30 Sep 2016 23:43:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15537429#comment-15537429
] 

Gary Helmling commented on HBASE-16644:
---------------------------------------

The patch looks good to me, though I'm not that familiar with this code.  Seems right that
whether the checksum is included in the header size should be based on the file format itself,
instead of whether we want to consult the checksum at the given moment.  So it seems correct.

+1 from me, assuming the 3 test failures are unrelated.

> Errors when reading legit HFile' Trailer on branch 1.3
> ------------------------------------------------------
>
>                 Key: HBASE-16644
>                 URL: https://issues.apache.org/jira/browse/HBASE-16644
>             Project: HBase
>          Issue Type: Bug
>          Components: HFile
>    Affects Versions: 1.3.0, 1.4.0
>            Reporter: Mikhail Antonov
>            Assignee: Mikhail Antonov
>            Priority: Critical
>             Fix For: 1.3.0
>
>         Attachments: HBASE-16644.branch-1.3.patch, HBASE-16644.branch-1.3.patch
>
>
> There seems to be a regression in branch 1.3 where we can't read HFile trailer(getting
"CorruptHFileException: Problem reading HFile Trailer") on some HFiles that could be successfully
read on 1.2.
> I've seen this error manifesting in two ways so far.
> {code}Caused by: org.apache.hadoop.hbase.io.hfile.CorruptHFileException: Problem reading
HFile Trailer from file  <file name>
> 	at org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:497)
> 	at org.apache.hadoop.hbase.io.hfile.HFile.createReader(HFile.java:525)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile$Reader.<init>(StoreFile.java:1164)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileInfo.open(StoreFileInfo.java:259)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFile.java:427)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:528)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:518)
> 	at org.apache.hadoop.hbase.regionserver.HStore.createStoreFileAndReader(HStore.java:652)
> 	at org.apache.hadoop.hbase.regionserver.HStore.access$000(HStore.java:117)
> 	at org.apache.hadoop.hbase.regionserver.HStore$1.call(HStore.java:519)
> 	at org.apache.hadoop.hbase.regionserver.HStore$1.call(HStore.java:516)
> 	... 6 more
> Caused by: java.io.IOException: Invalid HFile block magic: \x00\x00\x04\x00\x00\x00\x00\x00
> 	at org.apache.hadoop.hbase.io.hfile.BlockType.parse(BlockType.java:155)
> 	at org.apache.hadoop.hbase.io.hfile.BlockType.read(BlockType.java:167)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock.<init>(HFileBlock.java:344)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockDataInternal(HFileBlock.java:1735)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockData(HFileBlock.java:1558)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader$1.nextBlock(HFileBlock.java:1397)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader$1.nextBlockWithBlockType(HFileBlock.java:1405)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.<init>(HFileReaderV2.java:156)
> 	at org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:485)
> {code}
> and second
> {code}
> Caused by: org.apache.hadoop.hbase.io.hfile.CorruptHFileException: Problem reading HFile
Trailer from file <file path>
> 	at org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:497)
> 	at org.apache.hadoop.hbase.io.hfile.HFile.createReader(HFile.java:525)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile$Reader.<init>(StoreFile.java:1164)
> 	at org.apache.hadoop.hbase.io.HalfStoreFileReader.<init>(HalfStoreFileReader.java:104)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileInfo.open(StoreFileInfo.java:256)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFile.java:427)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:528)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:518)
> 	at org.apache.hadoop.hbase.regionserver.HStore.createStoreFileAndReader(HStore.java:652)
> 	at org.apache.hadoop.hbase.regionserver.HStore.access$000(HStore.java:117)
> 	at org.apache.hadoop.hbase.regionserver.HStore$1.call(HStore.java:519)
> 	at org.apache.hadoop.hbase.regionserver.HStore$1.call(HStore.java:516)
> 	... 6 more
> Caused by: java.io.IOException: Premature EOF from inputStream (read returned -1, was
trying to read 10083 necessary bytes and 24 extra bytes, successfully read 1072
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock.readWithExtra(HFileBlock.java:737)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader.readAtOffset(HFileBlock.java:1459)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockDataInternal(HFileBlock.java:1712)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockData(HFileBlock.java:1558)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader$1.nextBlock(HFileBlock.java:1397)
> 	at org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader$1.nextBlockWithBlockType(HFileBlock.java:1405)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.<init>(HFileReaderV2.java:156)
> 	at org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:485)
> {code}
> In my case this problem was reproducible by running `hbase hfile -m  -f` command. There
seem to be two changes in behavior introduced by HBASE-15477 (cc [~stack]).
> One is that HFileBlock#getOnDiskSizeWithHeader always assumes that checksum verification
is true (this behavior results in onDiskSizeWithHeader being calculated differently in 1.2
and 1.3 for some cases).
> Second is that in HFileBlock constructor we always attempt to retrive checksum-related
fields from the header even if no checksum verification is going on.
> Attached is the patch which when applied allows 1.3 to read again the same HFiles.



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