Question

当我第一步尝试Cassandra的Playlist tutorial时，我遇到了异常。我在Google Compute Engine上创建了一个VM并安装了cassandra 3.0.10（this link）。然后我做了教程所说的。

Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: localhost/127.0.0.1:9042 (com.datastax.driver.core.exceptions.InvalidQueryException: unconfigured table schema_keyspaces))
    at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:240)
    at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:86)
    at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1455)
    at com.datastax.driver.core.Cluster.init(Cluster.java:158)
    at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:329)
    at com.datastax.driver.core.Cluster.connect(Cluster.java:279)
    at playlist.model.CassandraData.createSession(CassandraData.java:66)
    at playlist.model.CassandraData.getSession(CassandraData.java:50)
    at playlist.model.CassandraInfo.<init>(CassandraInfo.java:25)
    at playlist.controller.HomeServlet.doGet(HomeServlet.java:23)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:595)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:191)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:72)
    at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:742)
    at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:712)
    at org.apache.jsp.index_jsp._jspService(index_jsp.java:123)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    ... 38 more

有人说com.datastax.cassandra的版本与Cassandra不匹配。在pom.xml中，com.datastax.cassandra的版本是2.1.10。虽然我将其更改为3.1.0，但仍然出现例外情况我应该采用哪个版本的com.datastax.cassandra？

顺便说一句，我可以使用com.datastax.cassandra3.1.0来访问Cassandra3.7。但使用com.datastax.cassandra2.1.10访问Cassandra3.7也有同样的例外。

Answer 1

问题确实是版本的不一致。当我使用$solo[2..6] = "slow"部署此应用程序时，我可以成功从Web浏览器访问它。但是，使用Tomcat所采用的教程对我不起作用。我不熟悉它。也许我做错了什么。

创建集群时cassandra中的InvalidQueryException

1 个答案: