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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: nodetool cfstats on 1.0.0-rc1 throws an exception
Date Mon, 03 Oct 2011 22:15:12 GMT
My suspicion would be that it has more to do with "rare case when
running with 5000 CFs" than "1.0 regression."

On Mon, Oct 3, 2011 at 5:00 PM, Ramesh Natarajan <ramesh25@gmail.com> wrote:
> We have about 5000 column family and when we run the nodetool cfstats it
> throws out this exception...  this is running 1.0.0-rc1
> This seems to work on 0.8.6.  Is this a bug in 1.0.0?
>
> thanks
> Ramesh
> Keyspace: system
>         Read Count: 28
>         Read Latency: 5.8675 ms.
>         Write Count: 3
>         Write Latency: 0.166 ms.
>         Pending Tasks: 0
>                 Column Family: Schema
>                 SSTable count: 4
>                 Space used (live): 4293758276
>                 Space used (total): 4293758276
>                 Number of Keys (estimate): 5376
>                 Memtable Columns Count: 0
>                 Memtable Data Size: 0
>                 Memtable Switch Count: 0
>                 Read Count: 3
>                 Read Latency: NaN ms.
>                 Write Count: 0
>                 Write Latency: NaN ms.
>                 Pending Tasks: 0
>                 Key cache capacity: 53
>                 Key cache size: 2
>                 Key cache hit rate: NaN
>                 Row cache: disabled
>                 Compacted row minimum size: 104
>                 Compacted row maximum size: 1955666
>                 Compacted row mean size: 1508515
>                 Column Family: HintsColumnFamily
>                 SSTable count: 0
>                 Space used (live): 0
>                 Space used (total): 0
>                 Number of Keys (estimate): 0
>                 Memtable Columns Count: 0
>                 Memtable Data Size: 0
>                 Memtable Switch Count: 0
>                 Read Count: 5
>                 Read Latency: NaN ms.
>                 Write Count: 0
>                 Write Latency: NaN ms.
>                 Pending Tasks: 0
>                 Key cache capacity: 1
>                 Key cache size: 0
>                 Key cache hit rate: NaN
>                 Row cache: disabled
>                 Compacted row minimum size: 0
>                 Compacted row maximum size: 0
>                 Compacted row mean size: 0
>                 Column Family: LocationInfo
>                 SSTable count: 1
>                 Space used (live): 6947
>                 Space used (total): 6947
>                 Number of Keys (estimate): 128
>                 Memtable Columns Count: 0
>                 Memtable Data Size: 0
>                 Memtable Switch Count: 2
>                 Read Count: 20
>                 Read Latency: NaN ms.
>                 Write Count: 3
>                 Write Latency: NaN ms.
>                 Pending Tasks: 0
>                 Key cache capacity: 1
>                 Key cache size: 1
>                 Key cache hit rate: NaN
>                 Row cache: disabled
>                 Compacted row minimum size: 73
>                 Compacted row maximum size: 258
>                 Compacted row mean size: 185
>                 Column Family: Migrations
>                 SSTable count: 4
>                 Space used (live): 4315909643
>                 Space used (total): 4315909643
>                 Number of Keys (estimate): 512
>                 Memtable Columns Count: 0
>                 Memtable Data Size: 0
>                 Memtable Switch Count: 0
>                 Read Count: 0
>                 Read Latency: NaN ms.
>                 Write Count: 0
>                 Write Latency: NaN ms.
>                 Pending Tasks: 0
>                 Key cache capacity: 5
>                 Key cache size: 0
>                 Key cache hit rate: NaN
>                 Row cache: disabled
>                 Compacted row minimum size: 5839589
>                 Compacted row maximum size: 9223372036854775807
> Exception in thread "main" java.lang.IllegalStateException: Unable to
> compute ceiling for max when histogram overflowed
>         at
> org.apache.cassandra.utils.EstimatedHistogram.mean(EstimatedHistogram.java:170)
>         at
> org.apache.cassandra.db.DataTracker.getMeanRowSize(DataTracker.java:395)
>         at
> org.apache.cassandra.db.ColumnFamilyStore.getMeanRowSize(ColumnFamilyStore.java:275)
>         at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at
> com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93)
>         at
> com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27)
>         at
> com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)
>         at
> com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:65)
>         at
> com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:216)
>         at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)
>         at
> com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638)
>         at
> javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1404)
>         at
> javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)
>         at
> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265)
>         at
> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1360)
>         at
> javax.management.remote.rmi.RMIConnectionImpl.getAttribute(RMIConnectionImpl.java:600)
>         at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at
> sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
>         at sun.rmi.transport.Transport$1.run(Transport.java:159)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
>         at
> sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
>         at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
>         at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
>         at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>         at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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