Question

如果我尝试

cassandra-cli -h myhost.compute-1.amazonaws.com

我连接到它没有任何问题。通过使用astyanax，它也有效。

但是，在playOrm中，如果我将主机字符串设置为myhost.compute-1.amazonaws.com:9160，它会抱怨我需要使用逗号分隔的字符串和主机列表。如果我使用myhost.compute-1.amazonaws.com:9160,或myhost.compute-1.amazonaws.com:9160,myhost.compute-1.amazonaws.com:9160，我会收到以下异常。

如何设置连接字符串以连接到远程主机？

java.lang.RuntimeException: com.netflix.astyanax.connectionpool.exceptions.TokenRangeOfflineException: TokenRangeOfflineException: [host=myhost.compute-1.amazonaws.com(...):9160, latency=336(336), attempts=1] UnavailableException()
    at com.alvazan.orm.layer9z.spi.db.cassandra.CursorKeysToRows.execute(CursorKeysToRows.java:157)
    at com.alvazan.orm.layer9z.spi.db.cassandra.CursorKeysToRows.loadCache(CursorKeysToRows.java:100)
    at com.alvazan.orm.layer9z.spi.db.cassandra.CursorKeysToRows.nextImpl(CursorKeysToRows.java:65)
    at com.alvazan.orm.layer0.base.CursorRow.nextImpl(CursorRow.java:33)
    at com.alvazan.orm.api.z8spi.iter.AbstractCursor.next(AbstractCursor.java:10)
    at com.alvazan.orm.layer0.base.BaseEntityManagerImpl.find(BaseEntityManagerImpl.java:132)
    at com.alvazan.orm.layer0.base.BaseEntityManagerImpl.saveMetaData(BaseEntityManagerImpl.java:235)
    at com.alvazan.orm.layer0.base.BaseEntityManagerFactoryImpl.rescan(BaseEntityManagerFactoryImpl.java:102)
    at com.alvazan.orm.layer0.base.BaseEntityManagerFactoryImpl.setup(BaseEntityManagerFactoryImpl.java:131)
    at com.alvazan.orm.impl.bindings.BootstrapImpl.createInstanceImpl(BootstrapImpl.java:64)
    at com.alvazan.orm.impl.bindings.BootstrapImpl.createInstance(BootstrapImpl.java:35)
    at com.alvazan.orm.api.base.Bootstrap.create(Bootstrap.java:57)
    at com.alvazan.orm.api.base.Bootstrap.create(Bootstrap.java:52)
    at com.alvazan.orm.api.base.Bootstrap.create(Bootstrap.java:45)
    at com.alvazan.orm.api.base.Bootstrap.create(Bootstrap.java:24)
    at com.s1mbi0se.dmp.da.dao.PlayOrmConfiguration.init(PlayOrmConfiguration.java:39)
    at com.s1mbi0se.dmp.da.dao.TestUserDao.testFindAllUsers(TestUserDao.java:73)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: com.netflix.astyanax.connectionpool.exceptions.TokenRangeOfflineException: TokenRangeOfflineException: [host=myhost.compute-1.amazonaws.com(....):9160, latency=336(336), attempts=1] UnavailableException()
    at com.netflix.astyanax.thrift.ThriftConverter.ToConnectionPoolException(ThriftConverter.java:165)
    at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:60)
    at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:27)
    at com.netflix.astyanax.thrift.ThriftSyncConnectionFactoryImpl$1.execute(ThriftSyncConnectionFactoryImpl.java:131)
    at com.netflix.astyanax.connectionpool.impl.AbstractExecuteWithFailoverImpl.tryOperation(AbstractExecuteWithFailoverImpl.java:52)
    at com.netflix.astyanax.connectionpool.impl.AbstractHostPartitionConnectionPool.executeWithFailover(AbstractHostPartitionConnectionPool.java:229)
    at com.netflix.astyanax.thrift.ThriftColumnFamilyQueryImpl$4.execute(ThriftColumnFamilyQueryImpl.java:457)
    at com.alvazan.orm.layer9z.spi.db.cassandra.CursorKeysToRows.execute(CursorKeysToRows.java:155)
    ... 39 more
Caused by: UnavailableException()
    at org.apache.cassandra.thrift.Cassandra$multiget_slice_result.read(Cassandra.java:9722)
    at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
    at org.apache.cassandra.thrift.Cassandra$Client.recv_multiget_slice(Cassandra.java:613)
    at org.apache.cassandra.thrift.Cassandra$Client.multiget_slice(Cassandra.java:597)
    at com.netflix.astyanax.thrift.ThriftColumnFamilyQueryImpl$4$1.internalExecute(ThriftColumnFamilyQueryImpl.java:463)
    at com.netflix.astyanax.thrift.ThriftColumnFamilyQueryImpl$4$1.internalExecute(ThriftColumnFamilyQueryImpl.java:460)
    at com.netflix.astyanax.thrift.AbstractOperationImpl.execute(AbstractOperationImpl.java:55)
    ... 45 more

Answer 1

代码期望真正的集群运行2个或更多节点而不是单个节点。（抱歉，感恩节假期）。您是否只需要连接到一个节点？

另外，我们在那里检测的原因是如果你只有一个节点我们做CL_ONE但我们假设可能不正确人们只会使用一个节点来玩cassandra（即localhost）。我们认为它们实际上不会只用一个节点。你需要修改吗？如果是这样，请告诉我们，我们可以改变它。

感谢，迪安

Answer 2

这已在版本1.4.2中修复，该版本可在Maven仓库中找到。如果您仍然遇到任何问题，请尝试告诉我们。

playorm仅连接到localhost

2 个答案: