when starting cassandra, there is "Keys must be written in ascending order."
error. and, when my application reads the datastore, it throws outofmemory
exception.
what causes this error? how should I go about to fix the problem? thanks,
-aj
INFO 15:55:19,713 Creating new commitlog segment
C:\dev\content\cassandra\commitlog\CommitLog-1273877719713.log
INFO 15:55:19,822 Last written key :
DecoratedKey(61078635599166706937511052402724559481:L,
61078635599166706937511052402724559481:L)
INFO 15:55:19,822 Current key :
DecoratedKey(136380791207214638541884810421800860241:Bootstrap,
136380791207214638541884810421800860241:Bootstrap)
INFO 15:55:19,822 Writing into file
C:\dev\content\cassandra\data\system\LocationInfo-tmp-10-Data.db
ERROR 15:55:20,385 Error in executor futuretask
java.util.concurrent.ExecutionException: java.io.IOException: Keys must be
written in ascending order.
at
java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
at java.util.concurrent.FutureTask.get(FutureTask.java:83)
at
org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor.afterExecute(DebuggableThreadPoolExecutor.java:86)
at
org.apache.cassandra.db.CompactionManager$CompactionExecutor.afterExecute(CompactionManager.java:582)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:888)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: Keys must be written in ascending order.
at
org.apache.cassandra.io.SSTableWriter.beforeAppend(SSTableWriter.java:71)
at
org.apache.cassandra.io.SSTableWriter.append(SSTableWriter.java:95)
at
org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:304)
at
org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:102)
at
org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:83)
at
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
--
AJ Chen, PhD
Chair, Semantic Web SIG, sdforum.org
http://web2express.org
twitter @web2express
Palo Alto, CA, USA
