Astyanax:简单写入引发此异常:没有足够的字节来读取组件的值

问题描述

我是不熟悉astyanax并尝试一些示例程序并遇到此错误的方法.这是一个简单的编写，看起来像是在做一些基本错误的事情.不使用组合键.

I am new to astyanax and trying some sample programs and getting this error. This is a simple write and looks like am doing some thing basic wrong. Not using composite keys.

Caused by: InvalidRequestException(why:Not enough bytes to read value of component 0)
    at org.apache.cassandra.thrift.Cassandra$batch_mutate_result.read(Cassandra.java:20833)
    at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
    at org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(Cassandra.java:964)
    at org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(Cassandra.java:950)
    at com.netflix.astyanax.thrift.ThriftKeyspaceImpl$1$1.internalExecute(ThriftKeyspaceImpl.java:120)
    at com.netflix.astyanax.thrift.ThriftKeyspaceImpl$1$1.internalExecute(ThriftKeyspaceImpl.java:117)
    at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:56)

代码如下:

    AstyanaxContext<Keyspace> context = new AstyanaxContext.Builder()
        .forCluster(CLUSTER_NAME)
        .forKeyspace(keySpaceName)
        .withAstyanaxConfiguration(new AstyanaxConfigurationImpl()      
            .setDiscoveryType(NodeDiscoveryType.RING_DESCRIBE)
            .setCqlVersion("3.0.0")
            .setTargetCassandraVersion("1.2")
        )
        .withConnectionPoolConfiguration(new ConnectionPoolConfigurationImpl("MyConnectionPool")
            .setPort(50825)
            .setMaxConnsPerHost(10)
            .setSeeds("nodename:50825")
            .setConnectTimeout(20000)
        )
        .withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
        .buildKeyspace(ThriftFamilyFactory.getInstance());

    context.start();
    System.out.println("getting context.. done ");
    Keyspace keyspace = context.getEntity();
    MutationBatch m = keyspace.prepareMutationBatch();

    ColumnFamily<String, String> colFam = new ColumnFamily<String, String>("test",
            StringSerializer.get(), StringSerializer.get());

    m.withRow(colFam, "abc")
        .putColumn("col2", "test1", null);
    m.execute();

以下是表格说明:

CREATE TABLE test (
 col1 text PRIMARY KEY,
 col2 text,
 col3 text
) WITH
 bloom_filter_fp_chance=0.010000 AND
 caching='KEYS_ONLY' AND
 comment='' AND
 dclocal_read_repair_chance=0.000000 AND
 gc_grace_seconds=864000 AND
 read_repair_chance=0.100000 AND
 replicate_on_write='true' AND
 populate_io_cache_on_flush='false' AND
 compaction={'class': 'SizeTieredCompactionStrategy'} AND
 compression={'sstable_compression': 'SnappyCompressor'};

推荐答案

我也是Astyanax的新手，遇到了相同的异常.例外是由于基于Astyanax Thrift的对象认为列定义应与使用CQL 3将其存储在1.2+中之间不匹配.我学会了指定COMPACT STORAGE，以便以1.2之前的格式创建表让我可以通过基于Thrift的对象与之交互. FWIW:我正在从源代码构建Astyanax，但是我确实在Maven Central看到了1.56.34.我也会对此进行更新.

I'm also new to Astyanax and encountering the the same exceptions. The exception is due to a mismatch between what Astyanax Thrift-based objects think the column definition should look like and how it is store in 1.2+ using CQL 3. I learned specifying COMPACT STORAGE so that the table is created in the pre 1.2 format will allow me interact with it via the Thrift-based objects. FWIW: I'm building Astyanax from source, but I did see a 1.56.34 in maven central; I would update to that also.

CREATE TABLE test (
 col1 text PRIMARY KEY,
 col2 text,
 col3 text
) WITH COMPACT STORAGE AND
...

请参见使用CQL 3之前的应用程序

这篇关于Astyanax:简单写入引发此异常:没有足够的字节来读取组件的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！