Pretty sure I could ask that better:
Is it possible for me to perform RowMutations on BinaryMemtable for a
ColumnFamily of type Super?
The bmt_example seems to say that it's possible, but cassandra 0.7 b3 seems to
disagree with the following:
ERROR [MutationStage:38] 2010-11-11 13:47:37,383
DebuggableThreadPoolExecutor.java (line 103) Error in ThreadPoolExecutor
java.lang.RuntimeException: java.lang.UnsupportedOperationException: This
operation is not supported for Super Columns.
at
org.apache.cassandra.db.BinaryVerbHandler.doVerb(BinaryVerbHandler.java:54)
at
org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:62)
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:619)
Caused by: java.lang.UnsupportedOperationException: This operation is not
supported for Super Columns.
at org.apache.cassandra.db.SuperColumn.value(SuperColumn.java:158)
at org.apache.cassandra.db.Table.load(Table.java:640)
at org.apache.cassandra.db.RowMutation.applyBinary(RowMutation.java:206)
at
org.apache.cassandra.db.BinaryVerbHandler.doVerb(BinaryVerbHandler.java:44)
The code in the bmt_example serializes the CF for the super columns and sets
that as column data (made me scratch my head) on a different CF for the
RowMutation. Attempting that causes the following exception:
Caused by: java.io.IOException: Invalid localDeleteTime read: 0
at
org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.java:334)
at
org.apache.cassandra.db.SuperColumnSerializer.deserialize(SuperColumn.java:291)
at
org.apache.cassandra.db.ColumnFamilySerializer.deserializeColumns(ColumnFamilySerializer.java:129)
at
org.apache.cassandra.db.ColumnFamilySerializer.deserialize(ColumnFamilySerializer.java:120)
at
org.apache.cassandra.db.RowMutationSerializer.defreezeTheMaps(RowMutation.java:368)
at
org.apache.cassandra.db.RowMutationSerializer.deserialize(RowMutation.java:378)
at
org.apache.cassandra.db.RowMutationSerializer.deserialize(RowMutation.java:336)
at
org.apache.cassandra.db.RowMutationMessageSerializer.deserialize(RowMutationMessage.java:84)
at
org.apache.cassandra.db.BinaryVerbHandler.doVerb(BinaryVerbHandler.java:42)
... which is basically because the CFSerializer is (rightly) expecting to
deserialize a super column though the bmt_example serialized a Standard CF.
Any help on BMT with supercolumns would be appreciated.
Thanks.
AD
From: Aditya Muralidharan [mailto:aditya.muralidha...@nisc.coop]
Sent: Thursday, November 11, 2010 3:27 PM
To: user@cassandra.apache.org
Subject: Cassandra 0.7 beta3 BinaryMemtable and Supercolumns
Is it possible for BinaryMemtable RowMutations to a ColumnFamily with
supercolumns?
