Question

我一直在尝试使用Elasticsearch作为Memcached的替代品。我已经安装了memcached传输，它看起来很好，并且在正确的端口上。但是，如果我尝试使用java spy.memcahed客户端库，我将无法缓存内容。

相反，我得到的错误如下：

2014-10-01 08:22:31.579 INFO net.spy.memcached.MemcachedConnection:  Added {QA sa=localhost/127.0.0.1:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue
2014-10-01 08:22:31.586 INFO net.spy.memcached.MemcachedConnection:  Connection state changed for sun.nio.ch.SelectionKeyImpl@76fb509a
2014-10-01 08:22:31.679 INFO net.spy.memcached.MemcachedConnection:  Reconnecting due to exception on {QA sa=localhost/127.0.0.1:11211, #Rops=2, #Wops=0, #iq=0, topRop=Cmd: 2 Opaque: 2 Key: foo Cas: 0 Exp: 1000 Flags: 0 Data Length: 3, topWop=null, toWrite=0, interested=1}
java.io.IOException: Disconnected unexpected, will reconnect.

一遍又一遍。

在Elasticsearch方面，我收到错误

[2014-10-01 08:22:31,675][ERROR][memcached.netty          ] [Living Hulk] Unsupported opcode [0x2], ignoring and closing connection

这是我的客户端配置：

ConnectionFactoryBuilder factory =  new ConnectionFactoryBuilder();
        factory.setProtocol(ConnectionFactoryBuilder.Protocol.BINARY);
        SerializingTranscoder t = new SerializingTranscoder(1000000);
        t.setCompressionThreshold(1024);
        factory.setTranscoder(t);
        factory.setOpTimeout(1000);
        factory.setTimeoutExceptionThreshold(1998);
        factory.setHashAlg(DefaultHashAlgorithm.KETAMA_HASH);
        factory.setLocatorType(ConnectionFactoryBuilder.Locator.CONSISTENT);
        factory.setFailureMode(FailureMode.Redistribute);
        factory.setUseNagleAlgorithm(false);

Answer 1

事实证明这个错误是因为我打电话给＃34; ADD＆＃34; （0x2）在客户端上。运输目前不支持ADD。 GitHub上存在一个问题：https://github.com/elasticsearch/elasticsearch-transport-memcached/issues/7

请注意，切换到SET会修复此特定问题，但是在GET上还存在spy.memcache存在问题的其他问题。

Elasticsearch作为Memcached的替代品

1 个答案: