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From Patrik Modesto <patrik.mode...@gmail.com>
Subject Re: AssertionError: originally calculated column size ...
Date Mon, 30 Apr 2012 19:11:27 GMT
Hi Aaron,

it's still an issue. However it's difficult to reproduce because I'd
need to insert data to Cassandra for day or more which is not
possible.

I think the problem is somehow connected to an IntegerType secondary
index. I had a different problem with CF with two secondary indexes,
the first UTF8Type, the second IntegerType. After a few hours of
inserting data in the afternoon and midnight repair+compact, the next
day I couldn't find any row using the IntegerType secondary index. The
output was like this:

[default@rfTest3] get IndexTest where col1 =
'3230727:http://zaskolak.cz/download.php';
-------------------
RowKey: 3230727:8383582:http://zaskolak.cz/download.php
=> (column=col1, value=3230727:http://zaskolak.cz/download.php,
timestamp=1335348630332000)
=> (column=col2, value=8383582, timestamp=1335348630332000)
-------------------
RowKey: 3230727:8383583:http://zaskolak.cz/download.php
=> (column=col1, value=3230727:http://zaskolak.cz/download.php,
timestamp=1335348449078000)
=> (column=col2, value=8383583, timestamp=1335348449078000)
-------------------
RowKey: 3230727:8383579:http://zaskolak.cz/download.php
=> (column=col1, value=3230727:http://zaskolak.cz/download.php,
timestamp=1335348778577000)
=> (column=col2, value=8383579, timestamp=1335348778577000)

3 Rows Returned.
Elapsed time: 292 msec(s).

[default@rfTest3] get IndexTest where col2 = 8383583;

0 Row Returned.
Elapsed time: 7 msec(s

You can see there really is an 8383583 in col2 in on of the listed
rows, but the search by secondary index returns nothing.

The Assert Exception also happend only on CF with the secondary index
of IntegerType. There were also secondary indexes of UTF8Type and
LongType types. It's the first time I've tried secondary indexes of
other type than UTF8Type.

Regards,
Patrik



On Mon, Apr 30, 2012 at 06:05, aaron morton <aaron@thelastpickle.com> wrote:
> Looks a bit like https://issues.apache.org/jira/browse/CASSANDRA-3579 but
> that was fixed in 1.0.7
>
> Is this still an issue ? Are you able to reproduce the fault ?
>
> Cheers
>
>
> -----------------
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 27/04/2012, at 6:56 PM, Patrik Modesto wrote:
>
> Hi,
>
> I've 4 node cluster of Cassandra 1.0.9. There is a rfTest3 keyspace
> with RF=3 and one CF with two secondary indexes. I'm importing data
> into this CF using Hadoop Mapreduce job, each row has less than 10
> colkumns. From JMX:
> MaxRowSize:  1597
> MeanRowSize: 369
>
> And there are some tens of millions of rows.
>
> It's write-heavy usage and there is a big pressure on each node, there
> are quite some dropped mutations on each node. After ~12 hours of
> inserting I see these assertion exceptiona on 3 out of four nodes:
>
> ERROR 06:25:40,124 Fatal exception in thread Thread[HintedHandoff:1,1,main]
> java.lang.RuntimeException: java.util.concurrent.ExecutionException:
> java.lang.AssertionError: originally calculated column size of
> 629444349 but now it is 588008950
>        at
> org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpointInternal(HintedHandOffManager.java:388)
>        at
> org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpoint(HintedHandOffManager.java:256)
>        at
> org.apache.cassandra.db.HintedHandOffManager.access$300(HintedHandOffManager.java:84)
>        at
> org.apache.cassandra.db.HintedHandOffManager$3.runMayThrow(HintedHandOffManager.java:437)
>        at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>        at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>        at java.lang.Thread.run(Thread.java:662)
> Caused by: java.util.concurrent.ExecutionException:
> java.lang.AssertionError: originally calculated column size of
> 629444349 but now it is 588008950
>        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
>        at java.util.concurrent.FutureTask.get(FutureTask.java:83)
>        at
> org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpointInternal(HintedHandOffManager.java:384)
>        ... 7 more
> Caused by: java.lang.AssertionError: originally calculated column size
> of 629444349 but now it is 588008950
>        at
> org.apache.cassandra.db.compaction.LazilyCompactedRow.write(LazilyCompactedRow.java:124)
>        at
> org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:160)
>        at
> org.apache.cassandra.db.compaction.CompactionTask.execute(CompactionTask.java:161)
>        at
> org.apache.cassandra.db.compaction.CompactionManager$7.call(CompactionManager.java:380)
>        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
>        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
>        ... 3 more
>
>
> Few lines regarding Hints from the output.log:
>
> INFO 06:21:26,202 Compacting large row
> system/HintsColumnFamily:70000000000000000000000000000000 (1712834057
> bytes) incrementally
> INFO 06:22:52,610 Compacting large row
> system/HintsColumnFamily:10000000000000000000000000000000 (2616073981
> bytes) incrementally
> INFO 06:22:59,111 flushing high-traffic column family
> CFS(Keyspace='system', ColumnFamily='HintsColumnFamily') (estimated
> 305147360 bytes)
> INFO 06:22:59,813 Enqueuing flush of
> Memtable-HintsColumnFamily@833933926(3814342/305147360 serialized/live
> bytes, 7452 ops)
> INFO 06:22:59,814 Writing
> Memtable-HintsColumnFamily@833933926(3814342/305147360 serialized/live
> bytes, 7452 ops)
>
>

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