[jira] [Commented] (CASSANDRA-6374) AssertionError for rows with zero columns

["Mikhail Mazursky (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-6374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13827283#comment-13827283 ] 

Mikhail Mazursky commented on CASSANDRA-6374:
---------------------------------------------

[~jbellis] can you explain please what exactly is a bad idea here? We are ok with "a row with zero columns will be removed as soon as it compacts". We just didn't expected this usage to be a problem - is it documented somewhere? It works fine with 1.2.x and do not work with 2.0.x.

> AssertionError for rows with zero columns
> -----------------------------------------
>
>                 Key: CASSANDRA-6374
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6374
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Anton Gorbunov
>
> After upgrading from 1.2.5 to 1.2.9 and then to 2.0.2 we've got those exceptions:
> {code}
> ERROR [FlushWriter:1] 2013-11-18 16:14:36,305 CassandraDaemon.java (line 187) Exception in thread Thread[FlushWriter:1,5,main]
> java.lang.AssertionError
>         at org.apache.cassandra.io.sstable.SSTableWriter.rawAppend(SSTableWriter.java:198)
>         at org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:186)
>         at org.apache.cassandra.db.Memtable$FlushRunnable.writeSortedContents(Memtable.java:360)
>         at org.apache.cassandra.db.Memtable$FlushRunnable.runWith(Memtable.java:315)
>         at org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48)
>         at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
>         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:722)
> {code}
> Also found similar issue in this thread:
> http://www.mail-archive.com/user@cassandra.apache.org/msg32875.html
> There Aaron Morton said that its caused by leaving rows with zero columns - that's exactly what we do in some CFs (using Thrift & Astyanax).



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