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From stack <st...@duboce.net>
Subject Re: Interesting heap dump of an OOME running Performance Evaluation on trunk
Date Wed, 26 Mar 2008 19:33:20 GMT
Anything in logs?  If using hat, I believe you can trace back up along 
each object to the GC root so you can figure who's keeping hold of the 
item; painful when 1.3M but looking at a few might give you sufficient clue.
St.Ack


Jim Kellerman wrote:
> But this was sequential write. So when regions split, the memcaches
> for lower regions should have been flushed and idle. Why do we hold
> so much stuff around if only the top region is really active?
>
> ---
> Jim Kellerman, Senior Engineer; Powerset
>
>
>   
>> -----Original Message-----
>> From: stack [mailto:stack@duboce.net]
>> Sent: Wednesday, March 26, 2008 12:13 PM
>> To: hbase-dev@hadoop.apache.org
>> Subject: Re: Interesting heap dump of an OOME running
>> Performance Evaluation on trunk
>>
>> Each region has a memcache.  Memcache is 64MB.  Each
>> HStoreKey has two Texts -- one for row, other for column.
>> 30*(64MB/1k records) each of which has a HSK makes for almost
>> 4M keys.  With half-full memcaches, we can easily have 1.3M
>> keys if my math is right.
>>
>> Regards the other objects, 30 regions * 2-10 store files --
>> up to 10 store files if region is being overrun with updates
>> -- with some logging thrown in is only about 100odd so maybe
>> something going on here.  But do these items have any weight?
>>  Are they large?  (If buffers were 4k..
>> then we're talking about 1M for 227 instances?)
>>
>> St.Ack
>>
>>
>> Bryan Duxbury wrote:
>>     
>>> Yikes. 1.3M Texts for 30 regions? that's crazy. Seems like
>>>       
>> we must be
>>     
>>> doing something wrong there.
>>>
>>> On Mar 26, 2008, at 11:37 AM, Jim Kellerman wrote:
>>>
>>>       
>>>> Ok, so no big surprise that there are a lot of Text and HStoreKeys
>>>> lying around, but look at the other stuff hanging out that really
>>>> should not be, esp when you consider the number of HRegions
>>>>
>>>> 1321116 instances of class org.apache.hadoop.io.Text
>>>> 660427 instances of class org.apache.hadoop.hbase.HStoreKey
>>>> 408 instances of class org.apache.hadoop.dfs.DatanodeInfo
>>>> 347 instances of class org.apache.hadoop.fs.Path
>>>> 227 instances of class org.apache.hadoop.io.DataInputBuffer
>>>> 227 instances of class org.apache.hadoop.io.DataInputBuffer$Buffer
>>>> 144 instances of class
>>>> org.apache.hadoop.io.compress.DecompressorStream
>>>> 136 instances of class org.apache.hadoop.dfs.Block
>>>> 136 instances of class [Lorg.apache.hadoop.dfs.DatanodeInfo;
>>>> 133 instances of class org.apache.hadoop.dfs.LocatedBlock
>>>> 105 instances of class org.apache.log4j.CategoryKey
>>>> 88 instances of class org.apache.hadoop.io.DataOutputBuffer
>>>> 88 instances of class org.apache.hadoop.io.DataOutputBuffer$Buffer
>>>> 78 instances of class org.apache.log4j.Logger
>>>> 77 instances of class org.apache.hadoop.io.SequenceFile$Metadata
>>>> 74 instances of class org.apache.commons.logging.impl.Log4JLogger
>>>> 72 instances of class
>>>> org.apache.hadoop.dfs.DFSClient$DFSDataInputStream
>>>> 72 instances of class
>>>>         
>> org.apache.hadoop.dfs.DFSClient$DFSInputStream
>>     
>>>> 72 instances of class org.apache.hadoop.dfs.LocatedBlocks
>>>> 72 instances of class org.apache.hadoop.io.SequenceFile$Reader
>>>> 72 instances of class
>>>> org.apache.hadoop.io.compress.zlib.BuiltInZlibInflater
>>>> 70 instances of class
>>>> org.apache.hadoop.dfs.DFSClient$DFSOutputStream$Packet
>>>> 44 instances of class org.apache.hadoop.dfs.DataChecksum
>>>> 39 instances of class org.apache.hadoop.dfs.DFSClient$BlockReader
>>>> 38 instances of class org.apache.hadoop.io.WritableComparator
>>>> 38 instances of class org.apache.hadoop.io.compress.DefaultCodec
>>>> 35 instances of class org.apache.hadoop.hbase.HStoreFile
>>>> 33 instances of class org.apache.hadoop.hbase.HColumnDescriptor
>>>> 33 instances of class org.apache.hadoop.hbase.HRegionInfo
>>>> 33 instances of class
>>>> org.apache.hadoop.hbase.HRegionServer$QueueEntry
>>>> 33 instances of class org.apache.hadoop.hbase.HTableDescriptor
>>>> 33 instances of class [Lorg.apache.hadoop.io.WritableComparable;
>>>> 30 instances of class org.apache.hadoop.hbase.HRegion 30
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.hbase.HRegion$WriteState
>>>> 30 instances of class
>>>> org.apache.hadoop.hbase.HStoreFile$BloomFilterMapFile$Reader
>>>> 30 instances of class org.mortbay.util.StringMap$Node
>>>> 29 instances of class org.apache.hadoop.hbase.HStore
>>>> 29 instances of class org.apache.hadoop.hbase.HStore$Memcache
>>>> 27 instances of class org.apache.log4j.ProvisionNode
>>>> 14 instances of class org.mortbay.util.StringMap
>>>> 13 instances of class org.apache.log4j.Level 10 instances of class
>>>> org.apache.hadoop.ipc.Server$Handler
>>>> 10 instances of class org.mortbay.http.PathMap$Entry
>>>> 8 instances of class org.apache.hadoop.fs.permission.FsAction
>>>> 8 instances of class
>>>> org.apache.hadoop.hbase.io.ImmutableBytesWritable
>>>> 8 instances of class org.apache.hadoop.ipc.Server$Connection
>>>> 8 instances of class [Lorg.mortbay.util.StringMap$Node;
>>>> 6 instances of class
>>>> org.apache.hadoop.hbase.HStoreFile$HalfMapFileReader
>>>> 6 instances of class
>>>> org.apache.hadoop.metrics.util.MetricsTimeVaryingRate$Metrics
>>>> 6 instances of class
>>>> org.apache.log4j.helpers.PatternParser$LiteralPatternConverter
>>>> 5 instances of class
>>>>         
>> org.apache.hadoop.dfs.DFSClient$DFSOutputStream
>>     
>>>> 5 instances of class
>>>> org.apache.hadoop.dfs.DFSClient$DFSOutputStream$DataStreamer
>>>> 5 instances of class org.apache.hadoop.fs.FSDataOutputStream
>>>> 5 instances of class
>>>> org.apache.hadoop.fs.FSDataOutputStream$PositionCache
>>>> 5 instances of class org.apache.hadoop.hbase.io.BatchOperation
>>>> 5 instances of class org.apache.hadoop.hbase.io.BatchUpdate
>>>> 5 instances of class
>>>>         
>> org.apache.hadoop.hbase.ipc.HbaseRPC$Invocation
>>     
>>>> 5 instances of class org.apache.hadoop.ipc.Server$Call
>>>> 5 instances of class org.mortbay.jetty.servlet.ServletHolder
>>>> 5 instances of class org.mortbay.jetty.servlet.ServletHolder$Config
>>>> 4 instances of class org.apache.hadoop.io.BytesWritable
>>>> 4 instances of class org.apache.hadoop.io.LongWritable
>>>> 4 instances of class org.mortbay.http.PathMap
>>>> 3 instances of class
>>>> org.apache.hadoop.dfs.DFSClient$DFSOutputStream$ResponseProcessor
>>>> 3 instances of class org.apache.hadoop.dfs.DatanodeInfo$AdminStates
>>>> 3 instances of class
>>>> org.apache.hadoop.dfs.FSConstants$DatanodeReportType
>>>> 3 instances of class
>>>>         
>> org.apache.hadoop.dfs.FSConstants$SafeModeAction
>>     
>>>> 3 instances of class
>>>>         
>> org.apache.hadoop.dfs.FSConstants$UpgradeAction
>>     
>>>> 3 instances of class
>>>> org.apache.hadoop.hbase.HAbstractScanner$MATCH_TYPE
>>>> 3 instances of class
>>>> org.apache.hadoop.hbase.HColumnDescriptor$CompressionType
>>>> 3 instances of class
>>>> org.apache.hadoop.hbase.HStore$MapFileCompactionReader
>>>> 3 instances of class org.apache.hadoop.hbase.HStoreFile$Reference
>>>> 3 instances of class org.apache.hadoop.hbase.ipc.HbaseRPC$Invoker
>>>> 3 instances of class
>>>> org.apache.hadoop.io.SequenceFile$CompressionType
>>>> 3 instances of class org.apache.hadoop.io.SequenceFile$Writer
>>>> 3 instances of class
>>>> org.apache.hadoop.metrics.util.MetricsTimeVaryingRate
>>>> 3 instances of class
>>>> org.apache.hadoop.metrics.util.MetricsTimeVaryingRate$MinMax
>>>> 3 instances of class org.apache.hadoop.net.StandardSocketFactory
>>>> 3 instances of class
>>>> org.apache.log4j.helpers.PatternParser$BasicPatternConverter
>>>> 3 instances of class org.mortbay.util.FileResource
>>>> 3 instances of class [Lorg.apache.hadoop.io.Text;
>>>> 2 instances of class org.apache.commons.logging.impl.LogFactoryImpl
>>>> 2 instances of class org.apache.hadoop.dfs.$Proxy1
>>>> 2 instances of class org.apache.hadoop.hbase.HBaseConfiguration
>>>> 2 instances of class org.apache.hadoop.hbase.HServerAddress
>>>> 2 instances of class
>>>> org.apache.hadoop.hbase.HStoreFile$BloomFilterMapFile$Writer
>>>> 2 instances of class org.apache.hadoop.hbase.HStoreFile$Range
>>>> 2 instances of class org.apache.hadoop.hbase.util.Sleeper
>>>> 2 instances of class org.apache.hadoop.io.BytesWritable$Comparator
>>>> 2 instances of class
>>>> org.apache.hadoop.io.SequenceFile$BlockCompressWriter
>>>> 2 instances of class org.apache.hadoop.io.SequenceFile$CodecPool
>>>> 2 instances of class org.apache.hadoop.io.UTF8
>>>> 2 instances of class org.apache.hadoop.io.compress.CompressorStream
>>>> 2 instances of class
>>>> org.apache.hadoop.io.compress.zlib.BuiltInZlibDeflater
>>>> 2 instances of class org.apache.hadoop.ipc.Client
>>>> 2 instances of class org.apache.hadoop.ipc.Client$Connection
>>>> 2 instances of class org.apache.hadoop.ipc.Client$Connection$1
>>>> 2 instances of class org.apache.hadoop.ipc.Client$Connection$2
>>>> 2 instances of class org.apache.hadoop.ipc.Client$ConnectionCuller
>>>> 2 instances of class org.apache.hadoop.ipc.Client$ConnectionId
>>>> 2 instances of class org.apache.log4j.helpers.OnlyOnceErrorHandler
>>>> 2 instances of class org.mortbay.http.ResourceCache
>>>> 2 instances of class org.mortbay.http.handler.ErrorPageHandler
>>>> 2 instances of class org.mortbay.util.MultiMap
>>>> 2 instances of class org.mortbay.util.SingletonList
>>>> 2 instances of class org.mortbay.util.ThreadPool$PoolThread
>>>> 2 instances of class
>>>> [Lorg.apache.hadoop.dfs.DatanodeInfo$AdminStates;
>>>> 2 instances of class
>>>> [Lorg.apache.hadoop.io.SequenceFile$CompressionType;
>>>> 2 instances of class [Lorg.mortbay.http.HttpHandler;
>>>> 1 instance of class $Proxy0
>>>> 1 instance of class $Proxy2
>>>> 1 instance of class $Proxy3
>>>> 1 instance of class org.apache.hadoop.dfs.Block$1
>>>> 1 instance of class org.apache.hadoop.dfs.DFSClient
>>>> 1 instance of class org.apache.hadoop.dfs.DFSClient$LeaseChecker
>>>> 1 instance of class org.apache.hadoop.dfs.DFSFileInfo$1
>>>> 1 instance of class org.apache.hadoop.dfs.DatanodeInfo$1
>>>> 1 instance of class org.apache.hadoop.dfs.DistributedFileSystem
>>>> 1 instance of class org.apache.hadoop.dfs.LocatedBlock$1
>>>> 1 instance of class org.apache.hadoop.dfs.LocatedBlocks$2
>>>> 1 instance of class org.apache.hadoop.fs.FileSystem$1
>>>> 1 instance of class org.apache.hadoop.fs.FileSystem$Cache
>>>> 1 instance of class org.apache.hadoop.fs.FileSystem$Cache$Key
>>>> 1 instance of class org.apache.hadoop.fs.FileSystem$ClientFinalizer
>>>> 1 instance of class org.apache.hadoop.fs.permission.FsPermission$1
>>>> 1 instance of class
>>>> org.apache.hadoop.hbase.HConnectionManager$TableServers
>>>> 1 instance of class org.apache.hadoop.hbase.HLog
>>>> 1 instance of class org.apache.hadoop.hbase.HLogEdit
>>>> 1 instance of class org.apache.hadoop.hbase.HLogKey
>>>> 1 instance of class org.apache.hadoop.hbase.HRegionLocation
>>>> 1 instance of class org.apache.hadoop.hbase.HRegionServer
>>>> 1 instance of class org.apache.hadoop.hbase.HRegionServer$1
>>>> 1 instance of class
>>>> org.apache.hadoop.hbase.HRegionServer$CompactSplitThread
>>>> 1 instance of class org.apache.hadoop.hbase.HRegionServer$Flusher
>>>> 1 instance of class org.apache.hadoop.hbase.HRegionServer$LogRoller
>>>> 1 instance of class
>>>> org.apache.hadoop.hbase.HRegionServer$ShutdownThread
>>>> 1 instance of class org.apache.hadoop.hbase.HRegionServer$Worker
>>>> 1 instance of class org.apache.hadoop.hbase.HServerInfo
>>>> 1 instance of class org.apache.hadoop.hbase.HServerLoad
>>>> 1 instance of class org.apache.hadoop.hbase.HTable
>>>> 1 instance of class org.apache.hadoop.hbase.Leases
>>>> 1 instance of class org.apache.hadoop.hbase.Leases$LeaseMonitor
>>>> 1 instance of class
>>>> org.apache.hadoop.hbase.io.ImmutableBytesWritable$Comparator
>>>> 1 instance of class org.apache.hadoop.hbase.ipc.HbaseRPC$Server
>>>> 1 instance of class org.apache.hadoop.hbase.util.InfoServer
>>>> 1 instance of class org.apache.hadoop.io.LongWritable$Comparator
>>>> 1 instance of class org.apache.hadoop.io.Text$Comparator
>>>> 1 instance of class org.apache.hadoop.io.UTF8$Comparator
>>>> 1 instance of class org.apache.hadoop.io.WritableUtils$1
>>>> 1 instance of class
>>>>         
>> org.apache.hadoop.io.retry.RetryInvocationHandler
>>     
>>>> 1 instance of class
>>>> org.apache.hadoop.io.retry.RetryPolicies$ExceptionDependentRetry
>>>> 1 instance of class
>>>> org.apache.hadoop.io.retry.RetryPolicies$ExponentialBackoffRetry
>>>> 1 instance of class
>>>>
>>>>         
>> org.apache.hadoop.io.retry.RetryPolicies$RemoteExceptionDependentRetr
>>     
>>>> y
>>>> 1 instance of class
>>>> org.apache.hadoop.io.retry.RetryPolicies$RetryForever
>>>> 1 instance of class
>>>>
>>>>         
>> org.apache.hadoop.io.retry.RetryPolicies$RetryUpToMaximumCountWithFix
>>     
>>>> edSleep
>>>>
>>>> 1 instance of class
>>>> org.apache.hadoop.io.retry.RetryPolicies$TryOnceDontFail
>>>> 1 instance of class
>>>> org.apache.hadoop.io.retry.RetryPolicies$TryOnceThenFail
>>>> 1 instance of class org.apache.hadoop.ipc.RPC$Invoker
>>>> 1 instance of class org.apache.hadoop.ipc.Server$Listener
>>>> 1 instance of class org.apache.hadoop.ipc.Server$Responder
>>>> 1 instance of class org.apache.hadoop.ipc.metrics.RpcMetrics
>>>> 1 instance of class org.apache.hadoop.ipc.metrics.RpcMgt
>>>> 1 instance of class org.apache.hadoop.metrics.ContextFactory
>>>> 1 instance of class org.apache.hadoop.metrics.jvm.EventCounter
>>>> 1 instance of class
>>>> org.apache.hadoop.metrics.jvm.EventCounter$EventCounts
>>>> 1 instance of class
>>>> org.apache.hadoop.metrics.spi.AbstractMetricsContext$RecordMap
>>>> 1 instance of class
>>>> org.apache.hadoop.metrics.spi.AbstractMetricsContext$TagMap
>>>> 1 instance of class org.apache.hadoop.metrics.spi.MetricsRecordImpl
>>>> 1 instance of class org.apache.hadoop.metrics.spi.NullContext
>>>> 1 instance of class
>>>> org.apache.hadoop.security.UnixUserGroupInformation
>>>> 1 instance of class org.apache.hadoop.util.Daemon
>>>> 1 instance of class org.apache.jasper.EmbeddedServletOptions
>>>> 1 instance of class org.apache.jasper.compiler.JspConfig
>>>> 1 instance of class org.apache.jasper.compiler.JspRuntimeContext
>>>> 1 instance of class org.apache.jasper.compiler.TagPluginManager
>>>> 1 instance of class org.apache.jasper.compiler.TldLocationsCache
>>>> 1 instance of class org.apache.jasper.runtime.JspFactoryImpl
>>>> 1 instance of class org.apache.jasper.servlet.JspServlet
>>>> 1 instance of class org.apache.jasper.util.SimplePool
>>>> 1 instance of class org.apache.jasper.util.SystemLogHandler
>>>> 1 instance of class org.apache.log4j.ConsoleAppender
>>>> 1 instance of class org.apache.log4j.DefaultCategoryFactory
>>>> 1 instance of class org.apache.log4j.Hierarchy
>>>> 1 instance of class org.apache.log4j.PatternLayout
>>>> 1 instance of class org.apache.log4j.helpers.AppenderAttachableImpl
>>>> 1 instance of class org.apache.log4j.helpers.FormattingInfo
>>>> 1 instance of class org.apache.log4j.helpers.ISO8601DateFormat
>>>> 1 instance of class org.apache.log4j.helpers.PatternParser
>>>> 1 instance of class
>>>> org.apache.log4j.helpers.PatternParser$ClassNamePatternConverter
>>>> 1 instance of class
>>>> org.apache.log4j.helpers.PatternParser$DatePatternConverter
>>>> 1 instance of class
>>>> org.apache.log4j.helpers.PatternParser$LocationPatternConverter
>>>> 1 instance of class org.apache.log4j.helpers.QuietWriter
>>>> 1 instance of class org.apache.log4j.or.DefaultRenderer
>>>> 1 instance of class org.apache.log4j.or.RendererMap
>>>> 1 instance of class org.apache.log4j.spi.DefaultRepositorySelector
>>>> 1 instance of class org.apache.log4j.spi.RootLogger
>>>> 1 instance of class org.mortbay.http.ContextLoader
>>>> 1 instance of class org.mortbay.http.HttpContext
>>>> 1 instance of class org.mortbay.http.SocketListener
>>>> 1 instance of class org.mortbay.http.handler.ResourceHandler
>>>> 1 instance of class org.mortbay.jetty.Server
>>>> 1 instance of class
>>>> org.mortbay.jetty.servlet.AbstractSessionManager$SessionScavenger
>>>> 1 instance of class org.mortbay.jetty.servlet.Default
>>>> 1 instance of class org.mortbay.jetty.servlet.HashSessionManager
>>>> 1 instance of class org.mortbay.jetty.servlet.JettyWebConfiguration
>>>> 1 instance of class
>>>>         
>> org.mortbay.jetty.servlet.ServletHandler$Context
>>     
>>>> 1 instance of class org.mortbay.jetty.servlet.WebApplicationContext
>>>> 1 instance of class org.mortbay.jetty.servlet.WebApplicationHandler
>>>> 1 instance of class org.mortbay.jetty.servlet.XMLConfiguration
>>>> 1 instance of class org.mortbay.util.IO$NullOS
>>>> 1 instance of class org.mortbay.util.IO$NullWrite
>>>> 1 instance of class org.mortbay.util.InetAddrPort
>>>> 1 instance of class org.mortbay.util.Pool
>>>> 1 instance of class org.mortbay.util.StringMap$NullEntry
>>>> 1 instance of class org.mortbay.util.ThreadedServer$Acceptor
>>>> 1 instance of class org.mortbay.xml.XmlParser
>>>> 1 instance of class org.mortbay.xml.XmlParser$Handler
>>>> 1 instance of class org.mortbay.xml.XmlParser$NoopHandler
>>>> 1 instance of class
>>>> [Lorg.apache.hadoop.dfs.FSConstants$DatanodeReportType;
>>>> 1 instance of class
>>>> [Lorg.apache.hadoop.dfs.FSConstants$SafeModeAction;
>>>> 1 instance of class
>>>> [Lorg.apache.hadoop.dfs.FSConstants$UpgradeAction;
>>>> 1 instance of class [Lorg.apache.hadoop.fs.permission.FsAction;
>>>> 1 instance of class
>>>> [Lorg.apache.hadoop.hbase.HAbstractScanner$MATCH_TYPE;
>>>> 1 instance of class
>>>> [Lorg.apache.hadoop.hbase.HColumnDescriptor$CompressionType;
>>>> 1 instance of class
>>>> [Lorg.apache.hadoop.hbase.HStore$CompactionReader;
>>>> 1 instance of class [Lorg.apache.hadoop.hbase.HStoreFile$Range;
>>>> 1 instance of class [Lorg.apache.hadoop.hbase.HStoreKey;
>>>> 1 instance of class
>>>> [Lorg.apache.hadoop.hbase.io.ImmutableBytesWritable;
>>>> 1 instance of class [Lorg.apache.hadoop.ipc.Server$Handler;
>>>> 1 instance of class
>>>> [Lorg.mortbay.jetty.servlet.WebApplicationContext$Configuration;
>>>> 1 instance of class [Lorg.mortbay.util.Pool$PondLife;
>>>> 1 instance of class [Lorg.mortbay.util.ThreadedServer$Acceptor;
>>>> 0 instances of class javax.servlet.FilterChain 0 instances
>>>>         
>> of class
>>     
>>>> javax.servlet.GenericServlet 0 instances of class
>>>> javax.servlet.RequestDispatcher 0 instances of class
>>>> javax.servlet.Servlet 0 instances of class
>>>> javax.servlet.ServletConfig 0 instances of class
>>>> javax.servlet.ServletContext 0 instances of class
>>>> javax.servlet.ServletException 0 instances of class
>>>> javax.servlet.ServletInputStream 0 instances of class
>>>> javax.servlet.ServletOutputStream 0 instances of class
>>>> javax.servlet.ServletRequest 0 instances of class
>>>> javax.servlet.ServletResponse 0 instances of class
>>>> javax.servlet.SingleThreadModel 0 instances of class
>>>> javax.servlet.UnavailableException
>>>> 0 instances of class javax.servlet.http.Cookie 0 instances
>>>>         
>> of class
>>     
>>>> javax.servlet.http.HttpServlet 0 instances of class
>>>> javax.servlet.http.HttpServletRequest
>>>> 0 instances of class javax.servlet.http.HttpServletResponse
>>>> 0 instances of class javax.servlet.http.HttpSession 0 instances of
>>>> class javax.servlet.jsp.HttpJspPage 0 instances of class
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>>>> javax.servlet.jsp.JspEngineInfo 0 instances of class
>>>> javax.servlet.jsp.JspFactory 0 instances of class
>>>> javax.servlet.jsp.JspPage 0 instances of class
>>>> javax.servlet.jsp.PageContext 0 instances of class
>>>> javax.servlet.jsp.el.VariableResolver
>>>> 0 instances of class org.apache.commons.logging.Log 0 instances of
>>>> class org.apache.commons.logging.LogConfigurationException
>>>> 0 instances of class org.apache.commons.logging.LogFactory
>>>> 0 instances of class org.apache.commons.logging.LogFactory$1
>>>> 0 instances of class org.apache.commons.logging.LogFactory$2
>>>> 0 instances of class org.apache.commons.logging.LogFactory$3
>>>> 0 instances of class
>>>>         
>> org.apache.commons.logging.impl.LogFactoryImpl$1
>>     
>>>> 0 instances of class org.apache.hadoop.conf.Configurable
>>>> 0 instances of class org.apache.hadoop.conf.Configuration
>>>> 0 instances of class org.apache.hadoop.conf.Configured 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.dfs.AlreadyBeingCreatedException
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>>>> 0 instances of class org.apache.hadoop.dfs.DFSClient$DNAddrPair
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>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.dfs.DatanodeDescriptor
>>>> 0 instances of class org.apache.hadoop.dfs.DatanodeID 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.dfs.DatanodeRegistration
>>>> 0 instances of class org.apache.hadoop.dfs.DfsPath 0 instances of
>>>> class org.apache.hadoop.dfs.DisallowedDatanodeException
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>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.dfs.FSImage 0 instances of class
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>>>>         
>> instances of class
>>     
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>>>>         
>> org.apache.hadoop.dfs.NotReplicatedYetException
>>     
>>>> 0 instances of class org.apache.hadoop.dfs.SafeModeException
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>>>> org.apache.hadoop.dfs.UnregisteredDatanodeException
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>>>> 0 instances of class
>>>> org.apache.hadoop.dfs.namenode.metrics.FSNamesystemMBean
>>>> 0 instances of class org.apache.hadoop.fs.ChecksumException
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>>>> 0 instances of class org.apache.hadoop.fs.FSOutputSummer
>>>> 0 instances of class org.apache.hadoop.fs.FileStatus 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.fs.FileSystem 0 instances of class
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>>>> 0 instances of class org.apache.hadoop.fs.LocalFileSystem
>>>> 0 instances of class org.apache.hadoop.fs.PathFilter 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.fs.PositionedReadable
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>>>> class org.apache.hadoop.fs.permission.AccessControlException
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>>>> org.apache.hadoop.hbase.FileSystemVersionException
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>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.HAbstractScanner$ColumnMatcher
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>>>> 0 instances of class org.apache.hadoop.hbase.HConstants
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.HInternalScannerInterface
>>>> 0 instances of class org.apache.hadoop.hbase.HMaster 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.hbase.HMasterInterface
>>>> 0 instances of class org.apache.hadoop.hbase.HMasterRegionInterface
>>>> 0 instances of class org.apache.hadoop.hbase.HMsg 0 instances of
>>>> class org.apache.hadoop.hbase.HRegion$HScanner
>>>> 0 instances of class org.apache.hadoop.hbase.HRegionInterface
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.HRegionServer$ScannerListener
>>>> 0 instances of class
>>>>         
>> org.apache.hadoop.hbase.HRegionServer$ToDoEntry
>>     
>>>> 0 instances of class org.apache.hadoop.hbase.HScannerInterface
>>>> 0 instances of class
>>>>         
>> org.apache.hadoop.hbase.HStore$CompactionReader
>>     
>>>> 0 instances of class org.apache.hadoop.hbase.HStore$HStoreScanner
>>>> 0 instances of class org.apache.hadoop.hbase.HStore$HStoreSize
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.HStore$Memcache$MemcacheScanner
>>>> 0 instances of class
>>>>         
>> org.apache.hadoop.hbase.HStore$StoreFileScanner
>>     
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.HStoreFile$HbaseMapFile$HbaseReader
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.HStoreFile$HbaseMapFile$HbaseWriter
>>>> 0 instances of class org.apache.hadoop.hbase.HTable$1 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.hbase.HTable$2 0 instances of class
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>>>> org.apache.hadoop.hbase.HTable$4 0 instances of class
>>>> org.apache.hadoop.hbase.HTable$5 0 instances of class
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>>>> org.apache.hadoop.hbase.InvalidColumnNameException
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>>>> 0 instances of class org.apache.hadoop.hbase.LocalHBaseCluster
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.LocalHBaseCluster$RegionServerThread
>>>> 0 instances of class org.apache.hadoop.hbase.LogRollListener
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.MasterNotRunningException
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.NoServerForRegionException
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.NotServingRegionException
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.RegionServerRunningException
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.RegionUnavailableListener
>>>> 0 instances of class org.apache.hadoop.hbase.TableNotFoundException
>>>> 0 instances of class
>>>>         
>> org.apache.hadoop.hbase.UnknownScannerException
>>     
>>>> 0 instances of class org.apache.hadoop.hbase.WrongRegionException
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.filter.RowFilterInterface
>>>> 0 instances of class org.apache.hadoop.hbase.filter.RowFilterSet
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.generated.regionserver.regionserver_jsp
>>>> 0 instances of class org.apache.hadoop.hbase.io.HbaseMapWritable
>>>> 0 instances of class org.apache.hadoop.hbase.io.HbaseObjectWritable
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.io.HbaseObjectWritable$NullInstance
>>>> 0 instances of class org.apache.hadoop.hbase.io.TextSequence
>>>> 0 instances of class org.apache.hadoop.hbase.ipc.HbaseRPC
>>>> 0 instances of class
>>>> org.apache.hadoop.hbase.ipc.HbaseRPC$VersionMismatch
>>>> 0 instances of class org.apache.hadoop.hbase.util.FSUtils
>>>> 0 instances of class org.apache.hadoop.hbase.util.JenkinsHash
>>>> 0 instances of class org.apache.hadoop.hbase.util.Threads
>>>> 0 instances of class org.apache.hadoop.hbase.util.Writables
>>>> 0 instances of class org.apache.hadoop.io.IOUtils 0 instances of
>>>> class org.apache.hadoop.io.MD5Hash 0 instances of class
>>>> org.apache.hadoop.io.MapFile$Reader
>>>> 0 instances of class org.apache.hadoop.io.MapFile$Writer
>>>> 0 instances of class org.apache.hadoop.io.NullWritable 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.io.ObjectWritable
>>>> 0 instances of class
>>>>         
>> org.apache.hadoop.io.ObjectWritable$NullInstance
>>     
>>>> 0 instances of class org.apache.hadoop.io.SequenceFile 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.io.SequenceFile$CompressedBytes
>>>> 0 instances of class
>>>> org.apache.hadoop.io.SequenceFile$RecordCompressWriter
>>>> 0 instances of class
>>>> org.apache.hadoop.io.SequenceFile$UncompressedBytes
>>>> 0 instances of class org.apache.hadoop.io.SequenceFile$ValueBytes
>>>> 0 instances of class org.apache.hadoop.io.VersionMismatchException
>>>> 0 instances of class org.apache.hadoop.io.Writable 0 instances of
>>>> class org.apache.hadoop.io.WritableComparable
>>>> 0 instances of class org.apache.hadoop.io.WritableFactories
>>>> 0 instances of class org.apache.hadoop.io.WritableFactory
>>>> 0 instances of class org.apache.hadoop.io.WritableName 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.io.WritableUtils
>>>> 0 instances of class org.apache.hadoop.io.compress.CompressionCodec
>>>> 0 instances of class
>>>> org.apache.hadoop.io.compress.CompressionInputStream
>>>> 0 instances of class
>>>> org.apache.hadoop.io.compress.CompressionOutputStream
>>>> 0 instances of class org.apache.hadoop.io.compress.Compressor
>>>> 0 instances of class org.apache.hadoop.io.compress.Decompressor
>>>> 0 instances of class org.apache.hadoop.io.compress.GzipCodec
>>>> 0 instances of class
>>>> org.apache.hadoop.io.compress.zlib.ZlibCompressor
>>>> 0 instances of class
>>>> org.apache.hadoop.io.compress.zlib.ZlibDecompressor
>>>> 0 instances of class org.apache.hadoop.io.compress.zlib.ZlibFactory
>>>> 0 instances of class org.apache.hadoop.io.retry.RetryPolicies
>>>> 0 instances of class
>>>> org.apache.hadoop.io.retry.RetryPolicies$RetryLimited
>>>> 0 instances of class org.apache.hadoop.io.retry.RetryPolicy
>>>> 0 instances of class org.apache.hadoop.io.retry.RetryProxy
>>>> 0 instances of class org.apache.hadoop.ipc.Client$Call 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.ipc.Client$ParallelCall
>>>> 0 instances of class org.apache.hadoop.ipc.RPC 0 instances
>>>>         
>> of class
>>     
>>>> org.apache.hadoop.ipc.RPC$Invocation
>>>> 0 instances of class org.apache.hadoop.ipc.RPC$VersionMismatch
>>>> 0 instances of class org.apache.hadoop.ipc.RemoteException
>>>> 0 instances of class org.apache.hadoop.ipc.Server 0 instances of
>>>> class org.apache.hadoop.ipc.VersionedProtocol
>>>> 0 instances of class org.apache.hadoop.ipc.metrics.RpcMgtMBean
>>>> 0 instances of class org.apache.hadoop.log.LogLevel$Servlet
>>>> 0 instances of class org.apache.hadoop.mapred.JobConf 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.mapred.StatusHttpServer$StackServlet
>>>> 0 instances of class org.apache.hadoop.metrics.MetricsContext
>>>> 0 instances of class org.apache.hadoop.metrics.MetricsException
>>>> 0 instances of class org.apache.hadoop.metrics.MetricsRecord
>>>> 0 instances of class org.apache.hadoop.metrics.MetricsUtil
>>>> 0 instances of class org.apache.hadoop.metrics.Updater 0
>>>>         
>> instances of
>>     
>>>> class org.apache.hadoop.metrics.spi.AbstractMetricsContext
>>>> 0 instances of class
>>>> org.apache.hadoop.metrics.spi.AbstractMetricsContext$1
>>>> 0 instances of class org.apache.hadoop.metrics.util.MBeanUtil
>>>> 0 instances of class org.apache.hadoop.net.DNS 0 instances
>>>>         
>> of class
>>     
>>>> org.apache.hadoop.net.NetUtils 0 instances of class
>>>> org.apache.hadoop.net.Node 0 instances of class
>>>> org.apache.hadoop.security.UnixUserGroupInformation$1
>>>> 0 instances of class
>>>>         
>> org.apache.hadoop.security.UserGroupInformation
>>     
>>>> 0 instances of class org.apache.hadoop.util.NativeCodeLoader
>>>> 0 instances of class org.apache.hadoop.util.ReflectionUtils
>>>> 0 instances of class org.apache.hadoop.util.Shell 0 instances of
>>>> class org.apache.hadoop.util.Shell$1 0 instances of class
>>>> org.apache.hadoop.util.Shell$ExitCodeException
>>>> 0 instances of class
>>>> org.apache.hadoop.util.Shell$ShellCommandExecutor
>>>> 0 instances of class org.apache.hadoop.util.StringUtils
>>>> 0 instances of class org.apache.hadoop.util.StringUtils$1
>>>> 0 instances of class org.apache.jasper.JasperException 0
>>>>         
>> instances of
>>     
>>>> class org.apache.jasper.Options 0 instances of class
>>>> org.apache.jasper.compiler.JspConfig$JspPropertyGroup
>>>> 0 instances of class org.apache.jasper.compiler.Node$Visitor
>>>> 0 instances of class org.apache.jasper.compiler.TagPluginManager$1
>>>> 0 instances of class
>>>> org.apache.jasper.compiler.tagplugin.TagPluginContext
>>>> 0 instances of class org.apache.jasper.runtime.HttpJspBase
>>>> 0 instances of class org.apache.jasper.runtime.JspFactoryImpl$1
>>>> 0 instances of class org.apache.jasper.runtime.JspSourceDependent
>>>> 0 instances of class org.apache.jasper.runtime.PageContextImpl
>>>> 0 instances of class org.apache.jasper.security.SecurityClassLoad
>>>> 0 instances of class org.apache.jasper.servlet.JspCServletContext
>>>> 0 instances of class org.apache.log4j.Appender 0 instances
>>>>         
>> of class
>>     
>>>> org.apache.log4j.AppenderSkeleton 0 instances of class
>>>> org.apache.log4j.Category 0 instances of class
>>>> org.apache.log4j.ConsoleAppender$SystemErrStream
>>>> 0 instances of class
>>>>         
>> org.apache.log4j.ConsoleAppender$SystemOutStream
>>     
>>>> 0 instances of class org.apache.log4j.Layout 0 instances of class
>>>> org.apache.log4j.LogManager 0 instances of class
>>>> org.apache.log4j.Priority 0 instances of class
>>>> org.apache.log4j.PropertyConfigurator
>>>> 0 instances of class org.apache.log4j.PropertyWatchdog 0
>>>>         
>> instances of
>>     
>>>> class org.apache.log4j.WriterAppender 0 instances of class
>>>> org.apache.log4j.config.PropertySetter
>>>> 0 instances of class
>>>>         
>> org.apache.log4j.config.PropertySetterException
>>     
>>>> 0 instances of class
>>>>         
>> org.apache.log4j.helpers.AbsoluteTimeDateFormat
>>     
>>>> 0 instances of class org.apache.log4j.helpers.DateTimeDateFormat
>>>> 0 instances of class org.apache.log4j.helpers.FileWatchdog
>>>> 0 instances of class org.apache.log4j.helpers.Loader 0
>>>>         
>> instances of
>>     
>>>> class org.apache.log4j.helpers.LogLog 0 instances of class
>>>> org.apache.log4j.helpers.OptionConverter
>>>> 0 instances of class org.apache.log4j.helpers.PatternConverter
>>>> 0 instances of class
>>>> org.apache.log4j.helpers.PatternParser$CategoryPatternConverter
>>>> 0 instances of class
>>>> org.apache.log4j.helpers.PatternParser$MDCPatternConverter
>>>> 0 instances of class
>>>> org.apache.log4j.helpers.PatternParser$NamedPatternConverter
>>>> 0 instances of class org.apache.log4j.or.ObjectRenderer
>>>> 0 instances of class org.apache.log4j.spi.AppenderAttachable
>>>> 0 instances of class org.apache.log4j.spi.Configurator 0
>>>>         
>> instances of
>>     
>>>> class org.apache.log4j.spi.ErrorHandler 0 instances of class
>>>> org.apache.log4j.spi.Filter 0 instances of class
>>>> org.apache.log4j.spi.LocationInfo 0 instances of class
>>>> org.apache.log4j.spi.LoggerFactory
>>>> 0 instances of class org.apache.log4j.spi.LoggerRepository
>>>> 0 instances of class org.apache.log4j.spi.LoggingEvent 0
>>>>         
>> instances of
>>     
>>>> class org.apache.log4j.spi.OptionHandler
>>>> 0 instances of class org.apache.log4j.spi.RendererSupport
>>>> 0 instances of class org.apache.log4j.spi.RepositorySelector
>>>> 0 instances of class org.mortbay.http.Authenticator 0 instances of
>>>> class org.mortbay.http.BasicAuthenticator
>>>> 0 instances of class org.mortbay.http.HttpException 0 instances of
>>>> class org.mortbay.http.HttpHandler 0 instances of class
>>>> org.mortbay.http.HttpListener 0 instances of class
>>>> org.mortbay.http.HttpOnlyCookie 0 instances of class
>>>> org.mortbay.http.HttpServer 0 instances of class
>>>> org.mortbay.http.SecurityConstraint
>>>> 0 instances of class org.mortbay.http.Version 0 instances of class
>>>> org.mortbay.http.handler.AbstractHttpHandler
>>>> 0 instances of class
>>>>         
>> org.mortbay.jetty.servlet.AbstractSessionManager
>>     
>>>> 0 instances of class
>>>> org.mortbay.jetty.servlet.AbstractSessionManager$Session
>>>> 0 instances of class org.mortbay.jetty.servlet.FormAuthenticator
>>>> 0 instances of class
>>>> org.mortbay.jetty.servlet.HashSessionManager$Session
>>>> 0 instances of class org.mortbay.jetty.servlet.Holder 0
>>>>         
>> instances of
>>     
>>>> class org.mortbay.jetty.servlet.ServletHandler
>>>> 0 instances of class org.mortbay.jetty.servlet.ServletHttpContext
>>>> 0 instances of class org.mortbay.jetty.servlet.ServletHttpRequest
>>>> 0 instances of class org.mortbay.jetty.servlet.SessionManager
>>>> 0 instances of class
>>>>         
>> org.mortbay.jetty.servlet.SessionManager$Session
>>     
>>>> 0 instances of class
>>>> org.mortbay.jetty.servlet.WebApplicationContext$Configuration
>>>> 0 instances of class
>>>> org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain
>>>> 0 instances of class
>>>> org.mortbay.jetty.servlet.WebApplicationHandler$Chain
>>>> 0 instances of class org.mortbay.util.BadResource 0 instances of
>>>> class org.mortbay.util.ByteArrayISO8859Writer
>>>> 0 instances of class org.mortbay.util.CachedResource 0
>>>>         
>> instances of
>>     
>>>> class org.mortbay.util.ComponentEvent 0 instances of class
>>>> org.mortbay.util.Container 0 instances of class
>>>> org.mortbay.util.Credential 0 instances of class
>>>> org.mortbay.util.Credential$Crypt 0 instances of class
>>>> org.mortbay.util.Credential$MD5 0 instances of class
>>>> org.mortbay.util.EventProvider 0 instances of class
>>>> org.mortbay.util.IO 0 instances of class
>>>> org.mortbay.util.JarFileResource 0 instances of class
>>>> org.mortbay.util.JarResource 0 instances of class
>>>> org.mortbay.util.LazyList 0 instances of class
>>>> org.mortbay.util.LifeCycle 0 instances of class
>>>> org.mortbay.util.LifeCycleEvent 0 instances of class
>>>> org.mortbay.util.Loader 0 instances of class
>>>> org.mortbay.util.LogSupport 0 instances of class
>>>> org.mortbay.util.MultiException 0 instances of class
>>>> org.mortbay.util.Password 0 instances of class
>>>> org.mortbay.util.Pool$PondLife 0 instances of class
>>>> org.mortbay.util.Resource 0 instances of class
>>>> org.mortbay.util.StringUtil 0 instances of class
>>>> org.mortbay.util.ThreadPool 0 instances of class
>>>> org.mortbay.util.ThreadedServer 0 instances of class
>>>> org.mortbay.util.URI 0 instances of class
>>>> org.mortbay.util.URLResource 0 instances of class
>>>> org.mortbay.util.UrlEncoded 0 instances of class
>>>> org.mortbay.util.WriterOutputStream
>>>> 0 instances of class org.mortbay.xml.XmlParser$1 0
>>>>         
>> instances of class
>>     
>>>> org.mortbay.xml.XmlParser$Attribute
>>>> 0 instances of class org.mortbay.xml.XmlParser$Node 0 instances of
>>>> class org.onelab.filter.BloomFilter 0 instances of class
>>>> org.onelab.filter.CountingBloomFilter
>>>> 0 instances of class org.onelab.filter.Filter 0 instances of class
>>>> org.onelab.filter.RemoveScheme 0 instances of class
>>>> org.onelab.filter.RetouchedBloomFilter
>>>> 0 instances of class [Lorg.apache.hadoop.dfs.DFSFileInfo;
>>>> 0 instances of class [Lorg.apache.hadoop.dfs.DatanodeID;
>>>> 0 instances of class [Lorg.apache.hadoop.dfs.LocatedBlock;
>>>> 0 instances of class [Lorg.apache.hadoop.fs.FileStatus;
>>>> 0 instances of class [Lorg.apache.hadoop.fs.Path; 0 instances of
>>>> class [Lorg.apache.hadoop.hbase.HConstants;
>>>> 0 instances of class
>>>> [Lorg.apache.hadoop.hbase.HInternalScannerInterface;
>>>> 0 instances of class [Lorg.apache.hadoop.hbase.HMsg; 0
>>>>         
>> instances of
>>     
>>>> class [Lorg.apache.hadoop.hbase.HRegion;
>>>> 0 instances of class [Lorg.apache.hadoop.hbase.HScannerInterface;
>>>> 0 instances of class [Lorg.apache.hadoop.hbase.HStore; 0
>>>>         
>> instances of
>>     
>>>> class [Lorg.apache.hadoop.io.MapFile$Reader;
>>>> 0 instances of class [Lorg.apache.hadoop.io.Writable; 0
>>>>         
>> instances of
>>     
>>>> class [Lorg.apache.hadoop.net.Node; 0 instances of class
>>>> [Lorg.mortbay.http.HttpContext; 0 instances of class
>>>> [Lorg.mortbay.http.HttpListener; 0 instances of class
>>>> [Lorg.mortbay.jetty.servlet.Holder;
>>>> 0 instances of class [Lorg.mortbay.jetty.servlet.ServletHolder;
>>>> 0 instances of class [Lorg.mortbay.util.Container; 0 instances of
>>>> class [Lorg.mortbay.util.EventProvider; 0 instances of class
>>>> [Lorg.mortbay.util.LifeCycle; 0 instances of class
>>>> [Lorg.mortbay.xml.XmlParser$Attribute;
>>>>
>>>> ---
>>>> Jim Kellerman, Senior Engineer; Powerset
>>>>
>>>> No virus found in this outgoing message.
>>>> Checked by AVG.
>>>> Version: 7.5.519 / Virus Database: 269.22.0/1344 - Release Date:
>>>> 3/26/2008 8:52 AM
>>>>
>>>>         
>> No virus found in this incoming message.
>> Checked by AVG.
>> Version: 7.5.519 / Virus Database: 269.22.0/1344 - Release
>> Date: 3/26/2008 8:52 AM
>>
>>
>>     
>
> No virus found in this outgoing message.
> Checked by AVG.
> Version: 7.5.519 / Virus Database: 269.22.0/1344 - Release Date: 3/26/2008 8:52 AM
>
>   


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