incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <jbel...@gmail.com>
Subject Re: NullPointerException in DatabaseDescriptor.getComparator
Date Wed, 24 Mar 2010 14:32:49 GMT
probably 0.5.1 is allowing an invalid query and erroring out when it
actually runs it.  0.6 beta3 should catch the problem earlier.

On Wed, Mar 24, 2010 at 9:28 AM, Oleg Mürk <oleg.myrk@gmail.com> wrote:
> Hello,
> I am having the following problem with Cassandra. When I first start
> Cassandra, it works fine and I insert some data, but when I kill cassandra
> and then start it again, it starts throwing NullPointerException (into
> log4j). When I restart Cassandra once more, it doesn't throw the exception
> (usually), but when I query for previously inserted data, it is gone.
> I am using out-of-the box Cassandra 0.5.1 on a single node (Java 6 / OS X
> 10.5.8). My schema is as follows:
> ------------------------------------------------
>     <Keyspace Name="zclosure">
>       <KeysCachedFraction>0.01</KeysCachedFraction>
>       <ColumnFamily CompareWith="UTF8Type" Name="url-item"/>
>       <ColumnFamily CompareWith="UTF8Type" Name="url-item-headers"/>
>     </Keyspace>
> ------------------------------------------------
> and the exception log is below. Any ideas?
> Thank You,
> Oleg Mürk
> -----------------------------------------------
> .......
> INFO - Log replay complete
> INFO - Saved Token found: 93658780503831948900522797887764765383
> INFO - Starting up server gossip
> DEBUG - Starting to listen on localhost/127.0.0.1
> DEBUG - Binding thrift service to localhost/127.0.0.1:9160
> INFO - Cassandra starting up...
> DEBUG - Disseminating load info ...
> DEBUG - get_count
> DEBUG - get_slice
> DEBUG - strongread reading data for SliceFromReadCommand(table='zclosure',
> key='http://paulgraham.com/kate.html',
> column_parent='QueryPath(columnFamilyName='url-item',
> superColumnName='null', col
> umnName='null')', start='', finish='', reversed=false, count=2147483647)
> from 29@localhost/127.0.0.1
> ERROR - Error in ThreadPoolExecutor
> java.lang.NullPointerException
>         at
> org.apache.cassandra.config.DatabaseDescriptor.getComparator(DatabaseDescriptor.java:914)
>         at
> org.apache.cassandra.io.SSTableReader.getColumnComparator(SSTableReader.java:414)
>         at
> org.apache.cassandra.db.filter.SSTableSliceIterator.<init>(SSTableSliceIterator.java:54)
>         at
> org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:63)
>         at
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamilyInternal(ColumnFamilyStore.java:1245)
>         at
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1203)
>         at
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1172)
>         at org.apache.cassandra.db.Table.getRow(Table.java:415)
>         at
> org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:59)
>         at
> org.apache.cassandra.db.ReadVerbHandler.doVerb(ReadVerbHandler.java:79)
>         at
> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:38)
>         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:637)
> ERROR - Fatal exception in thread Thread[ROW-READ-STAGE:1,5,main]
> java.lang.NullPointerException
>         at
> org.apache.cassandra.config.DatabaseDescriptor.getComparator(DatabaseDescriptor.java:914)
>         at
> org.apache.cassandra.io.SSTableReader.getColumnComparator(SSTableReader.java:414)
>         at
> org.apache.cassandra.db.filter.SSTableSliceIterator.<init>(SSTableSliceIterator.java:54)
>         at
> org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:63)
>         at
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamilyInternal(ColumnFamilyStore.java:1245)
>         at
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1203)
>         at
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1172)
>         at org.apache.cassandra.db.Table.getRow(Table.java:415)
>         at
> org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:59)
>         at
> org.apache.cassandra.db.ReadVerbHandler.doVerb(ReadVerbHandler.java:79)
>         at
> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:38)
>         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:637)
>

Mime
View raw message