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Date: Mon, 12 Aug 2013 22:17:48 +0000 (UTC)
From: "Huned Lokhandwala (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12551697.1334876911305.49849.1376345868863@arcas>
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References: <JIRA.12551697.1334876911305@arcas>
Subject: [jira] [Commented] (HBASE-5837) hbase shell deleteall to .META.
 allows insertion of malformed rowkey
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    [ https://issues.apache.org/jira/browse/HBASE-5837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737439#comment-13737439 ] 

Huned Lokhandwala commented on HBASE-5837:
------------------------------------------


The use case for the above is that, suppose I want to place a future delete marker to prevent a put command in the future, such that:

hbase(main):007:0> delete 'testtable', '2', 'f1:q1', 9223372036854775806

hbase(main):006:0* put 'testtable', '2', 'f1:q1', 'value-2', 30

would prevent the row 2 from being added to the 'testtable'. this functionality was supported in hbase 0.94 but is now lost in hbase 0.95.
                
> hbase shell deleteall to .META. allows insertion of malformed rowkey
> --------------------------------------------------------------------
>
>                 Key: HBASE-5837
>                 URL: https://issues.apache.org/jira/browse/HBASE-5837
>             Project: HBase
>          Issue Type: Bug
>          Components: master, shell
>    Affects Versions: 0.90.6, 0.95.2
>            Reporter: Jonathan Hsieh
>            Assignee: Ricky Saltzer
>             Fix For: 0.95.0
>
>         Attachments: HBASE-5837.patch
>
>
> When using the hbase shell to manipulate meta entries, one is allowed to 'delete' malformed rows (entries with less than 2 ascii 44 ',' chars).  When this happens HBase servers may go down and the cluster will not be restartable without manual intervention.  
> The delete results in a durable malformed rowkey in .META.'s memstore, .META.'s HLog, and eventually .META.'s HFiles.  Subsequent scans to meta (such as when a HMaster starts) fail in the scanner because the comparator fails.  In the case of an HMaster startup, it causes an abort that kills the HMaster process.
> {code}
> 12/04/18 22:07:34 FATAL master.HMaster: Unhandled exception. Starting shutdown.
> org.apache.hadoop.ipc.RemoteException: java.io.IOException: java.lang.IllegalArgumentException: No 44 in <blah,1334744821162.81f2df35c332dd2d3bb966fb5b419568.>, length=47, offset=54
> at org.apache.hadoop.hbase.regionserver.HRegionServer.convertThrowableToIOE(HRegionServer.java:990)
> at org.apache.hadoop.hbase.regionserver.HRegionServer.convertThrowableToIOE(HRegionServer.java:979)
> at org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1894)
> at org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1834)
> at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
> at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1039)
> Caused by: java.lang.IllegalArgumentException: No 44 in <blah,1334744821162.81f2df35c332dd2d3bb966fb5b419568.>, length=47, offset=54
> at org.apache.hadoop.hbase.KeyValue.getRequiredDelimiterInReverse(KeyValue.java:1300)
> at org.apache.hadoop.hbase.KeyValue$MetaKeyComparator.compareRows(KeyValue.java:1846)
> at org.apache.hadoop.hbase.regionserver.ScanQueryMatcher.match(ScanQueryMatcher.java:130)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:257)
> at org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:114)
> at org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.nextInternal(HRegion.java:2435)
> at org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.java:2391)
> at org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.next(HRegion.java:2408)
> at org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1870)
> ... 6 more
> at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:771)
> at org.apache.hadoop.hbase.ipc.HBaseRPC$Invoker.invoke(HBaseRPC.java:257)
> at $Proxy9.next(Unknown Source)
> at org.apache.hadoop.hbase.catalog.MetaReader.fullScan(MetaReader.java:264)
> at org.apache.hadoop.hbase.catalog.MetaReader.fullScan(MetaReader.java:237)
> at org.apache.hadoop.hbase.catalog.MetaReader.fullScanOfResults(MetaReader.java:220)
> at org.apache.hadoop.hbase.master.AssignmentManager.rebuildUserRegions(AssignmentManager.java:1580)
> at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:221)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:422)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:295)
> 12/04/18 22:07:34 INFO master.HMaster: Aborting 
> {code}

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