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From Ramzi Rabah <rra...@playdom.com>
Subject Re: Remove not working for me
Date Fri, 09 Oct 2009 00:53:44 GMT
Hi Jonathan thanks a lot for the quick response :) here is the error
in the server log

DEBUG [pool-1-thread-4] 2009-10-08 20:24:17,428 StorageProxy.java
(line 515) weakreadlocal reading
SliceFromReadCommand(table='Keyspace1', key='user1',
column_parent='QueryPath(columnFamilyName='Datastore',
superColumnName='[B@1a5e65f', columnName='null')', start='',
finish='', reversed=false, count=3)
ERROR [pool-1-thread-4] 2009-10-08 20:24:17,430 Cassandra.java (line
657) Internal error processing get_slice
java.lang.AssertionError
       at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1347)
       at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1325)
       at org.apache.cassandra.db.Table.getRow(Table.java:590)
       at org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:59)
       at org.apache.cassandra.service.StorageProxy.weakReadLocal(StorageProxy.java:518)
       at org.apache.cassandra.service.StorageProxy.readProtocol(StorageProxy.java:310)
       at org.apache.cassandra.service.CassandraServer.readColumnFamily(CassandraServer.java:99)
       at org.apache.cassandra.service.CassandraServer.getSlice(CassandraServer.java:180)
       at org.apache.cassandra.service.CassandraServer.multigetSliceInternal(CassandraServer.java:249)
       at org.apache.cassandra.service.CassandraServer.get_slice(CassandraServer.java:218)
       at org.apache.cassandra.service.Cassandra$Processor$get_slice.process(Cassandra.java:651)
       at org.apache.cassandra.service.Cassandra$Processor.process(Cassandra.java:609)
       at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:253)
       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)

On Thu, Oct 8, 2009 at 5:41 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
> "Internal error" usually means you found a bug.  Are there any
> exceptions in the server log?
>
> On Thu, Oct 8, 2009 at 7:33 PM, Ramzi Rabah <rrabah@playdom.com> wrote:
>> Hello all,
>>
>> I am trying to test Cassandra for deploying it in production in our
>> company, and I am very pleased with the performance of the
>> reads/writes on Columns. I did run into an issue with the API though
>> while trying to play with supercolumns. Here is my code:
>>
>> // Creating a supercolumn with name = "key" and columns ("value", "created").
>>        long now = System.currentTimeMillis();
>>        byte[] keyAsBytes = key.getBytes();
>>
>>        ColumnOrSuperColumn colOrSuperCol = new ColumnOrSuperColumn();
>>        SuperColumn superCol = new SuperColumn();
>>        colOrSuperCol.setSuper_column(superCol);
>>        superCol.setName(keyAsBytes);
>>        List<Column> cols = new ArrayList<Column>();
>>
>>        // first the key/value pair
>>        Column col = new Column();
>>        col.setName("value".getBytes());
>>        col.setValue(value);
>>        cols.add(col);
>>
>>        // then the time created
>>        col = new Column();
>>        col.setName("created".getBytes());
>>        col.setValue((now + "").getBytes());
>>        cols.add(col);
>>
>>        superCol.setColumns(cols);
>>
>>        Map<String, List<ColumnOrSuperColumn>> map = new
>> HashMap<String, List<ColumnOrSuperColumn>>();
>>        List<ColumnOrSuperColumn> list = new ArrayList<ColumnOrSuperColumn>();
>>        list.add(colOrSuperCol);
>>        map.put(COLUMN_FAMILY_NAME, list);
>>
>>        client.batch_insert(KEYSPACE_NAME, key, map, ConsistencyLevel.ONE);
>>
>>
>> // The GET of the supercolumn
>>        SlicePredicate predicate = new SlicePredicate(null, new
>> SliceRange(new byte
>> [0], new byte[0], false, 2));
>>        ColumnParent parent = new ColumnParent(COLUMN_FAMILY_NAME,
>> key.getBytes());
>>
>>        List<ColumnOrSuperColumn> columns = null;
>>            columns = client.get_slice(KEYSPACE_NAME, key,
>>                    parent, predicate, ConsistencyLevel.ONE);
>>
>>
>> // delete the supercolumn
>>            client.remove(KEYSPACE_NAME, key,new
>> ColumnPath(COLUMN_FAMILY_NAME, null, null),
>> System.currentTimeMillis(),ConsistencyLevel.ONE);
>>
>> // Do the get again
>>
>> When I try to delete the super column and then I try to read it again,
>> I get an exception thrown by cassandra
>>
>> org.apache.thrift.TApplicationException: Internal error processing get_slice
>>        at org.apache.thrift.TApplicationException.read(TApplicationException.java:107)
>>        at org.apache.cassandra.service.Cassandra$Client.recv_get_slice(Cassandra.java:171)
>>        at org.apache.cassandra.service.Cassandra$Client.get_slice(Cassandra.java:150)
>>        at com.playdom.cassandra.datastore.CassandraDataStore.testGet(CassandraDataStore.java:233)
>>        at com.playdom.cassandra.test.TestCassandraDataStore.testSetAndGetTrial(TestCassandraDataStore.java:58)
>>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>        at java.lang.reflect.Method.invoke(Method.java:597)
>>        at junit.framework.TestCase.runTest(TestCase.java:168)
>>        at junit.framework.TestCase.runBare(TestCase.java:134)
>>        at junit.framework.TestResult$1.protect(TestResult.java:110)
>>        at junit.framework.TestResult.runProtected(TestResult.java:128)
>>        at junit.framework.TestResult.run(TestResult.java:113)
>>        at junit.framework.TestCase.run(TestCase.java:124)
>>        at junit.framework.TestSuite.runTest(TestSuite.java:232)
>>        at junit.framework.TestSuite.run(TestSuite.java:227)
>>        at junit.textui.TestRunner.doRun(TestRunner.java:116)
>>        at com.intellij.rt.execution.junit.IdeaTestRunner.doRun(IdeaTestRunner.java:94)
>>        at junit.textui.TestRunner.doRun(TestRunner.java:109)
>>        at com.intellij.rt.execution.junit.IdeaTestRunner.startRunnerWithArgs(IdeaTestRunner.java:22)
>>        at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:118)
>>        at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:40)
>>
>> I was expecting a NotFoundException() since I thought the read will
>> not find anything. Also anytime I try to rerun this after the delete I
>> always get an exception in the reads.
>>
>> Am I doing something seriously wrong? Thanks a lot for your help
>>
>> Ray
>>
>

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