Cassandra 2.0-寫時單節點設置超時-復制/一致性？

Question

我正在嘗試在一個非常基本的設置（單個節點）中對cassandra（2.0.9）進行基准測試，但是使用datastax驅動程序（2.0.4）時，我很早就將批處理插入了WriteTimeoutException。 我正在使用具有14GB ram，jvm oracle 8u11的4核計算機。 有誰知道為什么我的寫作失敗？

以下是我的日志輸出。

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
2014-08-08 17:33:46 INFO ***.***.SimpleClient connect Connected to cluster: Test Cluster

2014-08-08 17:33:46 INFO ***.***.SimpleClient connect Connected to cluster: Test Cluster
Datacenter: datacenter1; Host: /<ip address>; Rack: rack1

2014-08-08 17:33:49 INFO ***.***.SimpleClient loadData i: 0
Exception in thread "main" com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra timeout during write query at consistency ONE (1 replica were required but only 0 acknowledged the write)
    at com.datastax.driver.core.exceptions.WriteTimeoutException.copy(WriteTimeoutException.java:54)
    at com.datastax.driver.core.DefaultResultSetFuture.extractCauseFromExecutionException(DefaultResultSetFuture.java:256)
    at com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultResultSetFuture.java:172)
    at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:52)
    at ***.***.SimpleClient.loadData(SimpleClient.java:97)
    at ***.***.App.cassandraMapInsert(App.java:371)
    at ***.***.App.main(App.java:354)
Caused by: com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra timeout during write query at consistency ONE (1 replica were required but only 0 acknowledged the write)
    at com.datastax.driver.core.exceptions.WriteTimeoutException.copy(WriteTimeoutException.java:54)
    at com.datastax.driver.core.Responses$Error.asException(Responses.java:93)
    at com.datastax.driver.core.DefaultResultSetFuture.onSet(DefaultResultSetFuture.java:108)
    at com.datastax.driver.core.RequestHandler.setFinalResult(RequestHandler.java:235)
    at com.datastax.driver.core.RequestHandler.onSet(RequestHandler.java:379)
    at com.datastax.driver.core.Connection$Dispatcher.messageReceived(Connection.java:584)
    at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:558)
    at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:777)
    at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
    at org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:71)
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:558)
    at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:777)
    at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
    at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:327)
    at org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:305)
    at org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:207)
    at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:558)
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:553)
    at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
    at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
    at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:343)
    at org.jboss.netty.channel.socket.nio.NioWorker.processSelectedKeys(NioWorker.java:274)
    at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:194)
    at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
    at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra timeout during write query at consistency ONE (1 replica were required but only 0 acknowledged the write)
    at com.datastax.driver.core.Responses$Error$1.decode(Responses.java:54)
    at com.datastax.driver.core.Responses$Error$1.decode(Responses.java:34)
    at com.datastax.driver.core.Message$ProtocolDecoder.decode(Message.java:182)
    at org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:67)
    ... 19 more

Answer 1

您可以在conf / cassandra.yaml文件中配置超時。

write_request_timeout_in_ms