[jira] [Created] (CASSANDRA-7051) UnsupportedOperationException

["Digant Modha (JIRA)" <ji...@apache.org>]

Digant Modha created CASSANDRA-7051:
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             Summary: UnsupportedOperationException
                 Key: CASSANDRA-7051
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7051
             Project: Cassandra
          Issue Type: Bug
          Components: API, Core
         Environment: Cassandra 2.0.6
            Reporter: Digant Modha
            Priority: Critical


UnsupportedOperationException exception thrown when using batchstatement.  This is because in org.apache.cassandra.cql3.statements.BatchStatement.unzipMutations returns a collection that does not support add if the size of mutation is 1.

STACK:
throws UnsupportedOperationException.
Daemon Thread [Native-Transport-Requests:1043] (Suspended (entry into method <init> in UnsupportedOperationException))
        UnsupportedOperationException.<init>() line: 42 [local variables unavailable]
        HashMap$Values(AbstractCollection<E>).add(E) line: 260
        HashMap$Values(AbstractCollection<E>).addAll(Collection<? extends E>) line: 342
        StorageProxy.mutateWithTriggers(Collection<IMutation>, ConsistencyLevel, boolean) line: 519
        BatchStatement.executeWithoutConditions(Collection<IMutation>, ConsistencyLevel) line: 210
        BatchStatement.execute(BatchStatement$BatchVariables, boolean, ConsistencyLevel, long) line: 203
        BatchStatement.executeWithPerStatementVariables(ConsistencyLevel, QueryState, List<List<ByteBuffer>>) line: 192
        QueryProcessor.processBatch(BatchStatement, ConsistencyLevel, QueryState, List<List<ByteBuffer>>, List<Object>) line: 373
        BatchMessage.execute(QueryState) line: 206
        Message$Dispatcher.messageReceived(ChannelHandlerContext, MessageEvent) line: 304
        Message$Dispatcher(SimpleChannelUpstreamHandler).handleUpstream(ChannelHandlerContext, ChannelEvent) line: 70
        DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline$DefaultChannelHandlerContext, ChannelEvent) line: 564
        DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(ChannelEvent) line: 791
        ChannelUpstreamEventRunnable.doRun() line: 43
        ChannelUpstreamEventRunnable(ChannelEventRunnable).run() line: 67
        RequestThreadPoolExecutor(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker) line: 1145
        ThreadPoolExecutor$Worker.run() line: 615
        Thread.run() line: 744

org.apache.cassandra.cql3.statements.BatchStatement:
private Collection<? extends IMutation> unzipMutations(Map<String, Map<ByteBuffer, IMutation>> mutations)
    {
        // The case where all statement where on the same keyspace is pretty common
        if (mutations.size() == 1)
            return mutations.values().iterator().next().values();

        List<IMutation> ms = new ArrayList<>();
        for (Map<ByteBuffer, IMutation> ksMap : mutations.values())
            ms.addAll(ksMap.values());
        return ms;
    }




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