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https://issues.apache.org/jira/browse/CASSANDRA-669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796913#action_12796913
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Brandon Williams commented on CASSANDRA-669:
--------------------------------------------

Received the following traceback after testing (during compaction):

ERROR - Error in executor futuretask
java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: 
Negative position
        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
        at java.util.concurrent.FutureTask.get(FutureTask.java:111)
        at 
org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor.afterExecute(DebuggableThreadPoolExecutor.java:53)
        at 
org.apache.cassandra.db.CompactionManager$CompactionExecutor.afterExecute(CompactionManager.java:591)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1118)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.IllegalArgumentException: Negative position
        at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:739)
        at org.apache.cassandra.io.SSTableReader.mmap(SSTableReader.java:273)
        at org.apache.cassandra.io.SSTableReader.<init>(SSTableReader.java:234)
        at 
org.apache.cassandra.io.SSTableWriter.closeAndOpenReader(SSTableWriter.java:157)
        at 
org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:307)
        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:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)


> Handle mmapping index files greater than 2GB
> --------------------------------------------
>
>                 Key: CASSANDRA-669
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-669
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.9
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 0.9
>
>         Attachments: 
> 0001-store-data-information-for-any-index-entries-spanning-.txt, 
> 0002-add-support-for-multiple-mmapped-index-segments-and-ad.txt
>
>
> "Who would ever have an index file larger than 2GB?" I thought.  Turns out 
> it's not that hard with narrow rows... :)

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