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From "Dan Peebles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5202) AssertionError in the backend: "DecoratedKey(-1, ) != DecoratedKey(x, y) ..." while querying data after bulk insert - 1M rows with 100 columns. Also failure to drop column families
Date Wed, 27 Mar 2013 16:55:16 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615484#comment-13615484
] 

Dan Peebles commented on CASSANDRA-5202:
----------------------------------------

Yuki: I'll try to reduce the truncate issue we're seeing when I get some time. It definitely
appears connected to this, and might suggest that there's a broader issue here. 

For what it's worth, we're now randomly also getting the following error message, as described
in the closely related CASSANDRA-4687 bug:

Caused by: java.io.EOFException: unable to seek to position X in Y (Z bytes) in read-only
mode

also cured by clearing the key caches.

                
> AssertionError in the backend: "DecoratedKey(-1, ) != DecoratedKey(x, y) ..." while querying
data after bulk insert - 1M rows with 100 columns. Also failure to drop column families
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-5202
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5202
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.1.9
>         Environment: OS: Windows 7, 
> Server: Cassandra 1.1.9 release drop
> Client: astyanax 1.56.21, 
> JVM: Sun/Oracle JVM 64 bit (jdk1.6.0_27)
>            Reporter: Marat Bedretdinov
>            Assignee: Yuki Morishita
>              Labels: test
>         Attachments: 5202-1.1.txt, astyanax-stress-driver.zip
>
>
> Attached is a driver that sequentially:
> 1. Drops keyspace
> 2. Creates keyspace
> 4. Creates 2 column families
> 5. Seeds 1M rows with 100 columns
> 6. Queries these 2 column families
> The above steps are repeated 1000 times.
> The following exception is observed at random (race - SEDA?):
> ERROR [ReadStage:55] 2013-01-29 19:24:52,676 AbstractCassandraDaemon.java (line 135)
Exception in thread Thread[ReadStage:55,5,main]
> java.lang.AssertionError: DecoratedKey(-1, ) != DecoratedKey(62819832764241410631599989027761269388,
313a31) in C:\var\lib\cassandra\data\user_role_reverse_index\business_entity_role\user_role_reverse_index-business_entity_role-hf-1-Data.db
> 	at org.apache.cassandra.db.columniterator.SSTableSliceIterator.<init>(SSTableSliceIterator.java:60)
> 	at org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:67)
> 	at org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:79)
> 	at org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:256)
> 	at org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:64)
> 	at org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1367)
> 	at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1229)
> 	at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1164)
> 	at org.apache.cassandra.db.Table.getRow(Table.java:378)
> 	at org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:69)
> 	at org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:822)
> 	at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1271)
> 	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)
> This exception appears in the server at the time of client submitting a query request
(row slice) and not at the time data is seeded. The client times out and this data can no
longer be queried as the same exception would always occur from there on.
> Also on iteration 201, it appears that dropping column families failed and as a result
their recreation failed with unique column family name violation (see exception below). Note
that the data files are actually gone, so it appears that the server runtime responsible for
creating column family was out of sync with the piece that dropped them:
> Starting dropping column families
> Dropped column families
> Starting dropping keyspace
> Dropped keyspace
> Starting creating column families
> Created column families
> Starting seeding data
> Total rows inserted: 1000000 in 5105 ms
> Iteration: 200; Total running time for 1000 queries is 232; Average running time of 1000
queries is 0 ms
> Starting dropping column families
> Dropped column families
> Starting dropping keyspace
> Dropped keyspace
> Starting creating column families
> Created column families
> Starting seeding data
> Total rows inserted: 1000000 in 5361 ms
> Iteration: 201; Total running time for 1000 queries is 222; Average running time of 1000
queries is 0 ms
> Starting dropping column families
> Starting creating column families
> Exception in thread "main" com.netflix.astyanax.connectionpool.exceptions.BadRequestException:
BadRequestException: [host=127.0.0.1(127.0.0.1):9160, latency=2468(2469), attempts=1]InvalidRequestException(why:Keyspace
names must be case-insensitively unique ("user_role_reverse_index" conflicts with "user_role_reverse_index"))
> 	at com.netflix.astyanax.thrift.ThriftConverter.ToConnectionPoolException(ThriftConverter.java:159)
> 	at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:60)
> 	at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:27)
> 	at com.netflix.astyanax.thrift.ThriftSyncConnectionFactoryImpl$1.execute(ThriftSyncConnectionFactoryImpl.java:140)
> 	at com.netflix.astyanax.connectionpool.impl.AbstractExecuteWithFailoverImpl.tryOperation(AbstractExecuteWithFailoverImpl.java:69)
> 	at com.netflix.astyanax.connectionpool.impl.AbstractHostPartitionConnectionPool.executeWithFailover(AbstractHostPartitionConnectionPool.java:255)
> 	at com.netflix.astyanax.thrift.ThriftKeyspaceImpl.createKeyspace(ThriftKeyspaceImpl.java:569)
> 	at com.nuance.mca.astyanax.App.recreateKeyspaceSchema(App.java:139)
> 	at com.nuance.mca.astyanax.App.main(App.java:88)
> Caused by: InvalidRequestException(why:Keyspace names must be case-insensitively unique
("user_role_reverse_index" conflicts with "user_role_reverse_index"))
> 	at org.apache.cassandra.thrift.Cassandra$system_add_keyspace_result.read(Cassandra.java:30010)
> 	at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
> 	at org.apache.cassandra.thrift.Cassandra$Client.recv_system_add_keyspace(Cassandra.java:1285)
> 	at org.apache.cassandra.thrift.Cassandra$Client.system_add_keyspace(Cassandra.java:1272)
> 	at com.netflix.astyanax.thrift.ThriftKeyspaceImpl$14.internalExecute(ThriftKeyspaceImpl.java:584)
> 	at com.netflix.astyanax.thrift.ThriftKeyspaceImpl$14.internalExecute(ThriftKeyspaceImpl.java:572)
> 	at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:55)
> 	... 7 more

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