当通过Pycassa从Cassandra获取行时,有时会出现TApplicationException: get_slice failed: unknown result]
。Cassandra/Pycassa:get_slice()/ get_indexed_slice()失败,TApplicationException:Unknown结果
我无法重现此异常,也无法找到有关此问题的任何文档。现在我将Cassandra作为单个节点运行(用于开发),并且Exception总是在发生大量并发请求的上下文中引发的。 我想知道这是因为性能问题还是与其他问题有关(因此,我想知道在生产环境中运行多个节点时它是否会消失)。
卡桑德拉版本是1.0.7,并从日志输出如下:
[DEBUG 17:45:58,253 Thrift transport error occurred during processing of message.
org.apache.thrift.transport.TTransportException
at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:132)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
at org.apache.thrift.transport.TFramedTransport.readFrame(TFramedTransport.java:129)
at org.apache.thrift.transport.TFramedTransport.read(TFramedTransport.java:101)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:378)
at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:297)
at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:204)
at org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:2877)
at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:187)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
DEBUG 17:45:58,315 logged out: #<User allow_all groups=[]>]
你在cassandra日志中看到了什么,以及cassandra的版本是什么? – sdolgy 2012-03-06 15:49:02
@sdolgy:我已经更新了上面的问题! – 2012-03-06 16:52:41
什么是您的pycassa控制台日志和您的密钥空间(运行cassandra-cli并键入describe ksName;) – 2012-05-28 07:57:36