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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2309) Scrub resulting in "Keys must be written in ascending order" exception
Date Wed, 23 Mar 2011 12:47:05 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13010100#comment-13010100
] 

Jonathan Ellis commented on CASSANDRA-2309:
-------------------------------------------

bq. The sstable2json attempt is throwing the following

That looks a lot like "sstable2json couldn't find the Cassandra schema"

bq. What might cause sstables with unordered keys to be written in 0.7.4?

Possibly some kind of ByteBuffer race, although you'd think more people would hit that.  Are
the keys correct-but-unordered or unordered-and-garbage?

> Scrub resulting in "Keys must be written in ascending order" exception
> ----------------------------------------------------------------------
>
>                 Key: CASSANDRA-2309
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2309
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.7.3, 0.7.4
>            Reporter: Jason Harvey
>
> Getting the following when I try to scrub. The SSTable causing it is over a gig. Trying
to repro on smaller tables so I have something to upload.
> {code}
> DEBUG [CompactionExecutor:1] 2011-03-10 12:07:13,264 CompactionManager.java (line 543)
Reading row at 552076476
> DEBUG [CompactionExecutor:1] 2011-03-10 12:07:13,265 CompactionManager.java (line 552)
row 6c6173745f636f6d6d656e74735f74335f386c387633 is 168 bytes
> DEBUG [CompactionExecutor:1] 2011-03-10 12:07:13,265 CompactionManager.java (line 581)
Index doublecheck: row 6c6173745f636f6d6d656e74735f74335f386c387633 is 168 bytes
>  INFO [CompactionExecutor:1] 2011-03-10 12:07:13,265 SSTableWriter.java (line 108) Last
written key : DecoratedKey(125686934811414729670440675125192621396, 627975726c2833626333626339353363353762313133373331336461303233396438303534312c66692e676f73757065726d6f64656c2e636f6d2f70726f66696c65732f2f6170706c65747265713d3132373333393332313937363529)
>  INFO [CompactionExecutor:1] 2011-03-10 12:07:13,265 SSTableWriter.java (line 109) Current
key : DecoratedKey(11163129555189411157074346827960371449, 6c6173745f636f6d6d656e74735f74335f386c387633)
>  INFO [CompactionExecutor:1] 2011-03-10 12:07:13,265 SSTableWriter.java (line 110) Writing
into file /var/lib/cassandra/data/reddit/permacache-tmp-f-168492-Data.db
>  WARN [CompactionExecutor:1] 2011-03-10 12:07:13,265 CompactionManager.java (line 599)
Non-fatal error reading row (stacktrace follows)
> java.io.IOException: Keys must be written in ascending order.
>         at org.apache.cassandra.io.sstable.SSTableWriter.beforeAppend(SSTableWriter.java:111)
>         at org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:128)
>         at org.apache.cassandra.db.CompactionManager.doScrub(CompactionManager.java:591)
>         at org.apache.cassandra.db.CompactionManager.access$600(CompactionManager.java:56)
>         at org.apache.cassandra.db.CompactionManager$3.call(CompactionManager.java:195)
>         at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
>         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>         at java.lang.Thread.run(Thread.java:636)
> {code}

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