【发布时间】：2014-10-02 11:26:18
【问题描述】：
我正在尝试在一个非常基本的设置（单节点）中对 cassandra (2.0.9) 进行基准测试，但是使用 datastax 驱动程序 (2.0.4) 我在批量插入中很早就收到了 WriteTimeoutException。我使用的是 14GB 内存的 4 核机器，jvm oracle 8u11。有人知道为什么我的写作失败了吗？
以下是我的日志输出。
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
【问题讨论】：
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标签： java ubuntu cassandra bigdata datastax